Overview
Winter has an excellent reputation as a quality manufacturer of aircraft
instruments. With all the high tech devices in sailplanes these days,
having a reliable mechanical variometer makes sense. It will
continue to work perfectly regardless of the status of your glider battery
and fuses. Winter is also known for their airspeed indicators,
MacCready speed-to-fly rings, altimeters, barographs and accessories for all those products.
Special
Instrument Dial Colors
In addition to the standard and classy white on black instrument dials,
Winter offers light ivory and anodized aluminum colors an option for many of
their instruments. The light ivory dials (with black markings and red
and black pointers) give the instruments a classic look that looks fantastic in
vintage sailplanes. Below is a photo of the ivory dials installed in
the panel of a Spalinger sailplane that is being worked on by Mike Redman at
RAW Fabrication, LLC. Click on the image to view a larger version.
There is a $80 extra charge for the ivory dials for most instruments, and
$50 for the W-1115 QM III bank indicator shown in the bottom center of the
photo. The upgrade part number is W-8028.
Special Instrument
Dial Colors
Standard
White markings
and pointers on a
black anodized background
Black markings and
red and black pointers on a
light ivory background
Black markings and
red and black pointers on an
anodized aluminum background
The Company
Flight instruments must ensure a safe flight and afford the pilot the
opportunity of exploiting the capabilities of his aircraft to the fullest.
The requirement placed on instruments of this nature in regard to measuring
accuracy, insensitivity to outside influences (vibration, acceleration,
fluctuations in temperature, etc.) and operational reliability are stringent
in the extreme
Photos from Winter's
Headquarters in Jungingen, Germany Click on the images below to view larger versions.
The small town of
Jungingen, Germany
The small town of
Jungingen, Germany
Photo from the castle
(Burg Hohenzollern) in the fog.
Instrument Assembly
Instrument Assembly
Adjusting Airspeed
Indicators
Gebr. Winter has accumulated many years'
experience in manufacturing and developing flight instruments. Thanks
to optimally equipped test facilities, instrument workshops and a staff of
experienced specialists, Winter instruments have become a byword for high
precision and reliability. Maximum emphasis is placed on dependable
service in the after-sales inspection and overhaul of the instruments.
Company Overview Video
This page will give you an overview of the
range of flight instruments Winter produces.
How to Order To order a product, click on the
button next to the product. When you are ready to complete your order, click on the
button. Click on the small images to view larger versions.
Part #
Description
Photo
(Click on images below to view large versions)
Ball Bank Indicator, Model:
QM I
Fits in a 57 mm (2 1/4") instrument hole. See drawing at
right for dimensions.
Whenever there is no turn and bank indicator, it is advisable to install
a bank indicator. This simple instrument is particularly useful
in training aircraft.
Note: There
is a small bubble inside the glass tube. There is a small space
for the bubble to hide on the right end of the tube. If you see
the bubble then simply tilt the unit to the left until the bubble goes
"home".
Ball Bank Indicator, Model:
QM III
This version is mounted in a case that fits into a standard 57 mm (2
1/4") instrument hole.
See drawing at right for dimensions.
Whenever there is no turn and bank indicator, it is advisable to install
a bank indicator. This simple instrument is particularly useful
in training aircraft.
Note: There
is a small bubble inside the glass tube. There is a small space
for the bubble to hide on the right end of the tube. If you see
the bubble then simply tilt the unit to the left until the bubble goes
"home".
Ball Bank Indicator, Model:
QM II
See drawing at right for dimensions.
Whenever there is no turn and bank indicator, it is advisable to install
a bank indicator. This simple instrument is particularly useful
in training aircraft.
Note: There
is a small bubble inside the glass tube. There is a small space
for the bubble to hide on the right end of the tube. If you see
the bubble then simply tilt the unit to the left until the bubble goes
"home".
Watch, Winter, by
Renée Gerove
This nice watch is a great conversation starter. It features the Winter
logo and a nice image of a glider. I wear mine often. It is neat to be
able to point to the glider image when describing to my friends what I
do for fun. I would describe the watch as a medium quality watch -
as reflected by the price.
Whoever
sits in the cockpit knows – precision becomes a passion. The
high-quality wrist watch is made by the well known manufacturer Renée
Gerove who has produced clocks for more than 30 years. The fashionable
noble-steel-casing is provided with a high-quality Swiss quartz-work.
With unscratchable mineral-glass and noble leather bracelet. Special
edition for our customers. You can see other watches by Renée
Gerove on their web site here:
http://www.renee-gerove.de
Battery
The watch uses a standard 377 battery. Mine came with a Sony
SR626SW battery which is also sometimes referred to as a 377 battery.
I replaced it with an Energizer 377 battery. The back can be
popped-off somewhat easily, but a tool is required to close it. I
have the proper tools here and can replace the battery for you for $30.
The battery should last several years. As with any watch purchased
in any store, it is unknown how new the battery will be when you
purchase the watch. It may have been on the shelf at Winter or my
office for several months. If the battery dies within 6 months of
purchasing the watch from me, I'll replace it for free - as long as you
pay to ship the watch to me.
FSZMD, Flying Hours
Counter, Digital
Winter flying hours counters are installed wherever actual flying time
has to be recorded, primarily a consideration in training and charter
aircraft, although this instrument should also be installed in aircraft
operated by clubs or by private individuals, where it permits a
check of inspection intervals to be kept.
The flying hours counter has an digital display which displays in hours.
It is connected to the aircraft’s total pressure sensor (pitot) and
automatically switches on when airspeed increases to 60 km/h. This
ensures that actual flying time only is recorded, while secondary times
for take off and landing are ignored.
Once installed, the plug can be sealed to prevent tampering.
Fits in a 57 mm (2 1/4") instrument hole. See drawing at
right for dimensions.
T tubing connector included
Power Input Required: 12 to 24 VDC, 2 to 4 mA
FSZM, Flying Hours
Counter, Analog
Winter flying hours counters are installed wherever actual flying time
has to be recorded, primarily a consideration in training and charter
aircraft, although this instrument should also be installed in aircraft
operated by clubs or by private individuals, where it permits a
check of inspection intervals to be kept.
The flying hours counter has an electrically driven counter mechanism
and the readings are in hours and minutes. It is connected to the
aircraft’s total pressure sensor (pitot) and automatically switches on when
airspeed increases to 60 km/h. This ensures that actual flying time only
is recorded, while secondary times for take off and landing are ignored.
Once installed, the plug can be sealed to prevent tampering.
Fits in a 57 mm (2 1/4") instrument hole. See drawing at
right for dimensions.
T tubing connector included
Power Input Required: 12 to 24 VDC, 20 mA
MacCready Rings
The MacCready type ring is an indispensable aid in cross-country soaring.
The ring is rotatable and is marked with speeds and a white triangle.
The chief use of the MacCready ring is to achieve the highest possible
cruising speed (average cross-country flying speed) on thermal cross-country
flights. This involves setting the white arrow to the anticipated rate
of climb for the next thermal. Optimum flight performance is assured
when the airspeed indicated by the airspeed indicator corresponds to the preselected flying speed to which the MacCready ring has been set. The
MacCready ring allows gliding distance and final approach to be
optimized. Please refer to relevant literature for further details.
When ordering, please do not forget to state the type of aircraft in which
the ring will be used. If the ring is retrofitted to a variometer of
older design, the original threaded ring of the instrument must be removed
and replaced by a grooved threaded ring onto which the MacCready ring can be
fixed with ease. Rings are available in blank and pre-labeled
versions.
MacCready Ring, 80 mm,
unmarked, with bezel-ring The MacCready type ring is an indispensable aid in cross-country soaring.
The ring is rotatable and is marked with speeds and a white triangle.
The chief use of the MacCready ring is to achieve the highest possible
cruising speed (average cross-country flying speed) on thermal cross-country
flights. This involves setting the white arrow to the anticipated rate
of climb for the next thermal. Optimum flight performance is assured
when the airspeed indicated by the airspeed indicator corresponds to the preselected
flying speed to which the MacCready ring has been set. The
MacCready ring allows gliding distance and final approach to be
optimized. Please refer to relevant literature for further
details. When ordering, please do not forget to state the type of
aircraft in which the ring will be used. If the ring is
retrofitted to a variometer of older design, the original threaded ring
of the instrument must be removed and replaced by a grooved threaded
ring onto which the MacCready ring can be fixed with ease.
This model comes with an unmarked ring that you can mark to match the
polar of your glider. Variometer not included.
MacCready Ring, 80 mm,
custom labeled for your glider, with bezel-ring
The MacCready type ring is an indispensable aid in cross-country soaring.
The ring is rotatable and is marked with speeds and a white triangle.
The chief use of the MacCready ring is to achieve the highest possible
cruising speed (average cross-country flying speed) on thermal cross-country
flights. This involves setting the white arrow to the anticipated rate
of climb for the next thermal. Optimum flight performance is assured
when the airspeed indicated by the airspeed indicator corresponds to the preselected
flying speed to which the MacCready ring has been set. The
MacCready ring allows gliding distance and final approach to be
optimized. Please refer to relevant literature for further
details. When ordering, please do not forget to state the type of
aircraft in which the ring will be used. If the ring is
retrofitted to a variometer of older design, the original threaded ring
of the instrument must be removed and replaced by a grooved threaded
ring onto which the MacCready ring can be fixed with ease. Variometer not included. When you place the online order you will need to select from the
following options:
Glider Make and Model
Units for the speed-to-fly markings
on the ring (knots, mph, km/hr)
Units and range of the vario dial (+/-
10 knots, or +/- 1000 ft/min, or +/- 5 m/s, or...?)
MacCready Ring, 57 mm,
unmarked, with bezel-ring
The MacCready type ring is an indispensable aid in cross-country soaring.
The ring is rotatable and is marked with speeds and a white triangle.
The chief use of the MacCready ring is to achieve the highest possible
cruising speed (average cross-country flying speed) on thermal cross-country
flights. This involves setting the white arrow to the anticipated rate
of climb for the next thermal. Optimum flight performance is assured
when the airspeed indicated by the airspeed indicator corresponds to the preselected
flying speed to which the MacCready ring has been set. The
MacCready ring allows gliding distance and final approach to be
optimized. Please refer to relevant literature for further
details. When ordering, please do not forget to state the type of
aircraft in which the ring will be used. If the ring is
retrofitted to a variometer of older design, the original threaded ring
of the instrument must be removed and replaced by a grooved threaded
ring onto which the MacCready ring can be fixed with ease. Variometer not included.
MacCready Ring, 57 mm,
custom labeled for your glider, with bezel-ring The MacCready type ring is an indispensable aid in cross-country soaring.
The ring is rotatable and is marked with speeds and a white triangle.
The chief use of the MacCready ring is to achieve the highest possible
cruising speed (average cross-country flying speed) on thermal cross-country
flights. This involves setting the white arrow to the anticipated rate
of climb for the next thermal. Optimum flight performance is assured
when the airspeed indicated by the airspeed indicator corresponds to the preselected
flying speed to which the MacCready ring has been set. The
MacCready ring allows gliding distance and final approach to be
optimized. Please refer to relevant literature for further
details. When ordering, please do not forget to state the type of
aircraft in which the ring will be used. If the ring is
retrofitted to a variometer of older design, the original threaded ring
of the instrument must be removed and replaced by a grooved threaded
ring onto which the MacCready ring can be fixed with ease. Variometer not included. When you place the online order you will need to select from the
following options:
Glider Type
Units for the speed-to-fly markings
on the ring (knots, mph, km/hr)
Units and range of the vario dial (+/-
10 knots, or +/- 1000 ft/min, or +/- 5 m/s, or...?)
Winter MacCready Ring
for 304 CZ-17m, 57mm -
Sale I'm not sure how I ended up with this extra ring, but I don't need
it. It is designed for use on a standard 57 mm Winter W-5453 variometer
in knots. It does not include a bezel ring, but they are available if
necessary. Most Winter variometers made in recent years already include
the necessary grooved bezel ring. A set like this one normally sells for
$83. I am selling it for $45.
The MacCready type ring is an indispensable aid in cross-country soaring.
The ring is rotatable and is marked with speeds and a white triangle.
The chief use of the MacCready ring is to achieve the highest possible
cruising speed (average cross-country flying speed) on thermal cross-country
flights. This involves setting the white arrow to the anticipated rate
of climb for the next thermal. Optimum flight performance is assured
when the airspeed indicated by the airspeed indicator corresponds to the preselected
flying speed to which the MacCready ring has been set. The
MacCready ring allows gliding distance and final approach to be
optimized. Please refer to relevant literature for further
details. When ordering, please do not forget to state the type of
aircraft in which the ring will be used. If the ring is
retrofitted to a variometer of older design, the original threaded ring
of the instrument must be removed and replaced by a grooved threaded
ring onto which the MacCready ring can be fixed with ease.
Variometers Vane type variometers measure the change in air pressure inherent to
changes in altitude. The instrument consists of a cylindrical chamber
with a precision-ft baffle plate (vane) rotating on shockproof jewel
bearings and centered by a coil spring. The vane divides the chamber
in two: one section is open to static pressure, while the other is connected
to an expansion tank in which a volume of air is insulated against thermal
effects. Differences in pressure are compensated by the narrow gap
between vane and chamber wall. There is a change in static pressure
when the aircraft climbs or descends, and a differential pressure is
established between the two sections of the chamber. The resultant
deflection of the vane provides a measure of the vertical speed and this
deflection is transferred to the pointer of the instrument. The
response rate of a variometer is important. In high-performance
gliding, thermals can be identified all the quicker and used all the more
efficiently if the variometer responds without delay.
Defined as the length of time the instrument
takes to reach 65% of its final reading in response to a sudden change in
vertical speed, the time constant serves as a standard for gauging speed of
response. The faster a variometer responds, the smaller its time
constant will be.
Vane type variometers with large measuring
ranges such as the 5 StV 5 (± 20 knots and ± 30 knots) have small time
constants. The volume of the expansion tank must be increased in order
to achieve comparable figures with variometers having the most common
measuring range (± 10 knots).
Winter Variometers Details Table
The Winter Variometer Details Table
contains a list of all the available variometers from Winter. Details
such as weight, response time, etc. are
included for each vario. Winter variometers come in a wide variety of flavors. I stock the most
commonly used units which are highlighted in the table and included in the price list below.
But I can get any unit you desire. Below is a list of options.
Ranges/Units
±10 knots
±1000 ft/m
±2 m/s
±5 m/s
±10 m/s
Scale Type
Linear - standard
Logarithmic - for more needle
movement at weak lift and sink (0.90 L capacity flask)
Size
80 mm (3 1/8")
57 mm (2 1/4")
Response Speed
Standard - 3 second (0.45 L capacity
flask)
Fast ("Sensitive") - 1.8 second
(0.90 L capacity flask)
Application
Indicates the aircraft's vertical speed (rate of climb, rate of
descent). The variometer is the most valuable aid on all types of
aircraft for pilots whishing to fully exploit the prevailing thermal
conditions. This variometer has a linear dial calibration so that
it can be used with a MacCready ring (see below).
Technical Data
Black plastic housing, See scale drawing at right for installation
dimensions. Shock-resistant
Weight: 0.220 kg (7.8 oz), Weight with W-9014 0.45
L capacity flask: 0.4 kg (14 oz)
Includes W-9014 0.45 L Capacity Flask
Manual-5StV-Variometers.pdf
Application
Indicates the aircraft's vertical speed (rate of climb, rate of
descent). The variometer is the most valuable aid on all types of
aircraft for pilots whishing to fully exploit the prevailing thermal
conditions. This variometer has a linear dial calibration so that
it can be used with a MacCready ring (see below).
Technical Data
Black plastic housing, See scale drawing at right for installation
dimensions. Shock-resistant
Weight: 0.220 kg (7.8 oz), Weight with W-9014 0.45
L capacity flask: 0.4 kg (14 oz)
Includes W-9014 0.45 L Capacity Flask
Manual-5StV-Variometers.pdf
Mechanical Variometer,
Vane Type,
Model: 5 StV 5-3 -
Most Popular
80 mm (3 1/8")
±10 knots
3 second response time
Application
Indicates the aircraft's vertical speed (rate of climb, rate of
descent).
Technical Data
Black plastic housing, See scale drawing at right for installation
dimensions.
Weight: 0.220 kg (7.8 oz), Weight with W-9014 0.45
L capacity flask: 0.4 kg (14 oz)
Includes W-9014 0.45 L Capacity Flask
Manual-5StV-Variometers.pdf
Application
Indicates the aircraft's vertical speed (rate of climb, rate of
descent). By using double the capacity used with the standard
vario, this unit offers nearly twice as fast a response time. This
variometer has a linear dial calibration so that it can be used with a
MacCready ring (see below).
Technical Data
Black plastic housing, See scale drawing at right for installation
dimensions. Requires the use of a W-9015 0.90 L Capacity Flask
or 2 x W-9014 0.45 L Capacity Flasks
Weight: 0.220 kg (7.8 oz), weight with W-9015 0.90
L capacity flask: 0.51 kg (1.12 lb)
Includes W-9015 0.90 L Capacity Flask
Manual-5StV-Variometers.pdf
Application
Indicates the aircraft's vertical speed (rate of climb, rate of
descent). By using double the capacity used with the standard
vario, this unit offers nearly twice as fast a response time. This
variometer has a linear dial calibration so that it can be used with a
MacCready ring (see below).
Technical Data
Black plastic housing, See scale drawing at right for installation
dimensions. Requires the use of a W-9015 0.90 L Capacity Flask
or 2 x W-9014 0.45 L Capacity Flasks
Weight: 0.220 kg (7.8 oz), weight with W-9015 0.90
L capacity flask: 0.51 kg (1.12 lb)
Includes W-9015 0.90 L Capacity Flask
Manual-5StV-Variometers.pdf
Application
With its logarithmic scale, the 5 StVL combines the advantages of a
precision variometer with those of a standard variometer. In the
precision range from 0 to ±200 ft/min the graduations are equal to 20
ft/min. From ±200 ft/min to the end of the scale the instrument is
a standard variometer. The needle travels farther in the low
lift/sink range than in high lift/sink range - giving you more
information when you need it in weak lift.
Note: Since the scale is not linear, this variometer cannot be used with
a MacCready ring.
Technical Data
Same as the 5 StV vane type variometer, Requires the use of a W-9015 0.90 L Capacity Flask
or 2 x W-9014 0.45 L Capacity Flasks
Weight: 0.220 kg (7.8 oz), weight with W-9015 0.90
L capacity flask: 0.51 kg (1.12 lb)
Includes W-9015 0.90 L Capacity Flask
Manual-5StV-Variometers.pdf
Application
With its logarithmic scale, the 5 StVL combines the advantages of a
precision variometer with those of a standard variometer. In the
precision range from 0 to ±2 knots the graduations are equal to 0.2
knots. From ±2 knots to the end of the scale the instrument is a
standard variometer. The needle travels farther in the low
lift/sink range than in high lift/sink range - giving you more
information when you need it in weak lift.
Note: Since the scale is not linear, this variometer cannot be used with
a MacCready ring.
Technical Data
Same as the 5 StV vane type variometer, Requires the use of a W-9015 0.90 L Capacity Flask
or 2 x W-9014 0.45 L Capacity Flasks
Weight: 0.220 kg (7.8 oz), weight with W-9015 0.90
L capacity flask: 0.51 kg (1.12 lb)
Includes W-9015 0.90 L Capacity Flask
Manual-5StV-Variometers.pdf
Application
Indicates the aircraft's vertical speed (rate of climb, rate of
descent). The variometer is the most valuable aid on all types of
aircraft for pilots whishing to fully exploit the prevailing thermal
conditions. This variometer has a linear dial calibration so that
it can be used with a MacCready ring (see below).
Technical Data
Black plastic housing, See scale drawing at right for installation
dimensions. Shock-resistant
Weight: 0.220 kg (7.8 oz), Weight with W-9014 0.45
L capacity flask: 0.4 kg (14 oz)
Includes W-9014 0.45 L Capacity Flask
Manual-5StV-Variometers.pdf
Application
Indicates the aircraft's vertical speed (rate of climb, rate of
descent). The variometer is the most valuable aid on all types of
aircraft for pilots whishing to fully exploit the prevailing thermal
conditions. This variometer has a linear dial calibration so that
it can be used with a MacCready ring (see below).
Technical Data
Black plastic housing, See scale drawing at right for installation
dimensions. Shock-resistant
Weight: 0.220 kg (7.8 oz), Weight with W-9014 0.45
L capacity flask: 0.4 kg (14 oz)
Includes W-9014 0.45 L Capacity Flask
Manual-5StV-Variometers.pdf
Mechanical Variometer,
Vane Type,
Model: 5 StVM 5-3 - Most Popular
57 mm (2 1/4")
±10 knots,
3 second
response time
Application
Indicates the aircraft's vertical speed (rate of climb, rate of
descent). The variometer is the most valuable aid on all types of
aircraft for pilots whishing to fully exploit the prevailing thermal
conditions. This variometer has a linear dial calibration so that
it can be used with a MacCready ring (see below).
Technical Data
Black plastic housing, See scale drawing at right for installation
dimensions. Shock-resistant
Weight: 0.220 kg (7.8 oz), Weight with W-9014 0.45
L capacity flask: 0.4 kg (14 oz)
Includes W-9014 0.45 L Capacity Flask
Manual-5StV-Variometers.pdf
Application
Indicates the aircraft's vertical speed (rate of climb, rate of
descent). By using double the capacity used with the standard
vario, this unit offers nearly twice as fast a response time. This
variometer has a linear dial calibration so that it can be used with a
MacCready ring (see below).
Technical Data
Black plastic housing, See scale drawing at right for installation
dimensions. Requires the use of a W-9015 0.90 L Capacity Flask
or 2 x W-9014 0.45 L Capacity Flasks
Weight: 0.220 kg (7.8 oz), weight with W-9015 0.90
L capacity flask: 0.51 kg (1.12 lb)
Includes W-9015 0.90 L Capacity Flask
Manual-5StV-Variometers.pdf
Application
Indicates the aircraft's vertical speed (rate of climb, rate of
descent). By using double the capacity used with the standard
vario, this unit offers nearly twice as fast a response time. This
variometer has a linear dial calibration so that it can be used with a
MacCready ring (see below).
Technical Data
Black plastic housing, See scale drawing at right for installation
dimensions. Requires the use of a W-9015 0.90 L Capacity Flask
or 2 x W-9014 0.45 L Capacity Flasks
Weight: 0.220 kg (7.8 oz), weight with W-9015 0.90
L capacity flask: 0.51 kg (1.12 lb)
Includes W-9015 0.90 L Capacity Flask
Manual-5StV-Variometers.pdf
Application
With its logarithmic scale, the 5 StVL combines the advantages of a
precision variometer with those of a standard variometer. In the
precision range from 0 to ±200 ft/min the graduations are equal to 20
ft/min. From ±200 ft/min to the end of the scale the instrument is
a standard variometer. The needle travels farther in the low
lift/sink range than in high lift/sink range - giving you more
information when you need it in weak lift.
Note: Since the scale is not linear, this variometer cannot be used with
a MacCready ring.
Technical Data
Same as the 5 StV vane type variometer, Requires the use of a W-9015 0.90 L Capacity Flask
or 2 x W-9014 0.45 L Capacity Flasks
Weight: 0.220 kg (7.8 oz), weight with W-9015 0.90
L capacity flask: 0.51 kg (1.12 lb)
Includes W-9015 0.90 L Capacity Flask
Manual-5StV-Variometers.pdf
Application
With its logarithmic scale, the 5 StVL combines the advantages of a
precision variometer with those of a standard variometer. In the
precision range from 0 to ±200 ft/min the graduations are equal to 20
ft/min. From ±200 ft/min to the end of the scale the instrument is
a standard variometer. The needle travels farther in the low
lift/sink range than in high lift/sink range - giving you more
information when you need it in weak lift.
Note: Since the scale is not linear, this variometer cannot be used with
a MacCready ring.
Technical Data
Same as the 5 StV vane type variometer, Requires the use of a W-9015 0.90 L Capacity Flask
or 2 x W-9014 0.45 L Capacity Flasks
Weight: 0.220 kg (7.8 oz), weight with W-9015 0.90
L capacity flask: 0.51 kg (1.12 lb)
Includes W-9015 0.90 L Capacity Flask
Manual-5StV-Variometers.pdf
Großkinsky - Variable-Camberflap
Rings Application
As is generally known, wing load and, in turn, the optimum flap
positions for the varios speed ranges of a variable-flap glider changes
with take-of weight. Until now, selecting the right flap position
has involved using special tables carried on board or observing a
confusingly large number of marks on the airspeed indicator. The
new adjustable ring for airspeed indicators makes these complicated
methods things of the past.
Features
As the illustration shows, the ring has a double scale for aircraft
weight "G": and wing loading "G/F". Four arrows can also be seen,
showing the corresponding angles for the flap positions. The
number of arrows depends on the number of flap positions for the type of
glider in question. Like the MacCready ring of the variometer, the
rotatable ring is simply push-fitted onto the airspeed indicator.
Use
One the take-off weight has been calculated by adding the empty weight
of the aircraft, the weight of the pilot and the weight of any water
ballast on board, the "G" scale is simply turned until this figure is
aligned with the 0 mark on the airspeed indicator. The arrows on
the ring now automatically show the correct flap positions on the
airspeed indicator scale. Furthermore, the correct wing load for
the take-off weight can be read from the "G/F" scale and entered in an
electronic variometer or flight computer, if fitted. If wing load
changes in the course of the flight, due to a reduction in ballast, for
example, the ring need only be turned back to the new flying weight, and
immediately, the arrows show the new, flight-dependent flap positions.
The ring is calibrated for a standard preset acceleration of 1 g.
If values as high as 1.2 g should occur, as they do in high-performance
competition gliding, a second ring with the appropriate values can be
fitted during the flight, or changed as required. If the
Großkinsky ring is not ordered along with a new airspeed indicator,
please send us a digital photo of the airspeed indicator and state the type of aircraft in
which it is installed, because the scales vary from model to model.
Only the 6 FMS 4 or 7 FMS 4 series airspeed indicators with 510° scales
are suitable.
Großkinsky - Variable-Camberflap
Ring, 80 mm Application
As is generally known, wing load and, in turn, the optimum flap
positions for the varios speed ranges of a variable-flap glider changes
with take-of weight. Until now, selecting the right flap position
has involved using special tables carried on board or observing a
confusingly large number of marks on the airspeed indicator. The
new adjustable ring for airspeed indicators makes these complicated
methods things of the past.
Features
As the illustration shows, the ring has a double scale for aircraft
weight "G": and wing loading "G/F". Four arrows can also be seen,
showing the corresponding angles for the flap positions. The
number of arrows depends on the number of flap positions for the type of
glider in question. Like the MacCready ring of the variometer, the
rotatable ring is simply push-fitted onto the airspeed indicator.
Use
One the take-off weight has been calculated by adding the empty weight
of the aircraft, the weight of the pilot and the weight of any water
ballast on board, the "G" scale is simply turned until this figure is
aligned with the 0 mark on the airspeed indicator. The arrows on
the ring now automatically show the correct flap positions on the
airspeed indicator scale. Furthermore, the correct wing load for
the take-off weight can be read from the "G/F" scale and entered in an
electronic variometer or flight computer, if fitted. If wing load
changes in the course of the flight, due to a reduction in ballast, for
example, the ring need only be turned back to the new flying weight, and
immediately, the arrows show the new, flight-dependent flap positions.
The ring is calibrated for a standard preset acceleration of 1 g.
If values as high as 1.2 g should occur, as they do in high-performance
competition gliding, a second ring with the appropriate values can be
fitted during the flight, or changed as required. If the
Großkinsky ring is not ordered along with a new airspeed indicator,
please send us the airspeed indicator and state the type of aircraft in
which it is installed, because the scales vary from model to model.
Only the 6 FMS 4 or 7 FMS 4 series airspeed indicators with 510° scales
are suitable. Note: Airspeed indicator not included.
If the Großkinsky ring is not ordered along with a new airspeed
indicator, please send us a digital photo of the airspeed indicator and state the type of aircraft in
which it is installed, because the scales vary from model to model.
Großkinsky - Variable-Camberflap
Ring, 57 mm Application
As is generally known, wing load and, in turn, the optimum flap
positions for the varios speed ranges of a variable-flap glider changes
with take-of weight. Until now, selecting the right flap position
has involved using special tables carried on board or observing a
confusingly large number of marks on the airspeed indicator. The
new adjustable ring for airspeed indicators makes these complicated
methods things of the past.
Features
As the illustration shows, the ring has a double scale for aircraft
weight "G": and wing loading "G/F". Four arrows can also be seen,
showing the corresponding angles for the flap positions. The
number of arrows depends on the number of flap positions for the type of
glider in question. Like the MacCready ring of the variometer, the
rotateable ring is simply push-fitted onto the airspeed indicator.
Use
One the take-off weight has been calculated by adding the empty weight
of the aircraft, the weight of the pilot and the weight of any water
ballast on board, the "G" scale is simply turned until this figure is
aligned with the 0 mark on the airspeed indicator. The arrows on
the ring now automatically show the correct flap positions on the
airspeed indicator scale. Furthermore, the correct wing load for
the take-off weight can be read from the "G/F" scale and entered in an
electronic variometer or flight computer, if fitted. If wing load
changes in the course of the flight, due to a reduction in ballast, for
example, the ring need only be turned back to the new flying weight, and
immediately, the arrows show the new, flight-dependent flap positions.
The ring is calibrated for a standard preset acceleration of 1 g.
If values as high as 1.2 g should occur, as they do in high-performance
competition gliding, a second ring with the appropriate values can be
fitted during the flight, or changed as required. If the
Großkinsky ring is not ordered along with a new airspeed indicator,
please send us the airspeed indicator and state the type of aircraft in
which it is installed, because the scales vary from model to model.
Only the 6 FMS 4 or 7 FMS 4 series airspeed indicators with 510° scales
are suitable. Note: Airspeed indicator not included.
Note: The photo at right shows an 80 mm ring rather than a 57 mm
ring.
If the Großkinsky ring
is not ordered along with a new airspeed indicator, please send us a
digital photo of the airspeed indicator and state the type of aircraft in
which it is installed, because the scales vary from model to model.
6 SR, Pitot/Static Tube
(Prandtl Tube) with Right-Angle Mount The pitot pressure input is at the tip of the tube and the static
ports are slots on the side of the tube. The mounting arm has a hole and
a slot to use for mounting it to the aircraft.
For use with 5 mm I.D. (internal diameter)
tubing (see W-9001), Also works with 3/16 inch
I.D. tubing.
Material: Stainless Steel
Dimensions
Length of Head: 150 mm (5.9 in)
Diameter of Head: 16 mm (0.63 in)
Length of Mounting Arm: 245 mm (9.6 in)
Length from bottom of Prandtl tube to center of top mounting hole: 175
mm (6.9 in)
Weight: 227 g (8 ounces)
6 DSD Static Pressure
Sensor Pair 1 pair of static pressure sensors with mounting screws and nuts
It is common practice to install a pitot
tube in the nose of a glider to measure total pressure, along with two
pressure sensors (this item), one on each side of the fuselage, to
measure static pressure. The static pressure sensors must be
installed at points where the airstream flowing past the fuselage does
not cause any disturbance.
For use with 5 mm I.D. (internal diameter)
tubing (see W-9001), Also works with 3/16 inch
I.D. tubing.
Material: Stainless Steel
Dimensions
Diameter of round plate: 35 mm (1.38 in)
Weight for 1 pair: 62 g (2.2 ounces)
Airspeed Indicators Airspeed indicators measure the difference between total pressure and
static pressure. The total (or measured) pressure is sensed by a pitot
tube positioned at the stagnation point of the airstream and is carried to
the airspeed indicator by a hose. A static pressure sensor can also be
connected. The measuring element is an open diaphragm unit with
excellent elastic properties; hysteresis (differences between advance and
return movement) and secondary elastic effects are negligible. The
total pressure and static pressure act on the diaphragm, causing a
deformation that is transferred to the pointer by a linkage and gear
mechanism. The different operating ranges of the aircraft can be
identified by color markings on the airspeed indicator dial; e. g. green for
normal operating range, yellow for caution, white for flaps down and red for
maximum speed. The instruments are insensitive to shock and vibration.
Winter Airspeed Indicators Details Table
The Winter Airspeed Indicator Details Table
contains a list of all the available airspeed indicators from Winter. Details
such as weight, speed range, etc. are
included for each unit. I stock the most commonly used units which are
highlighted in the table and included in the price list below.
But I can get any unit you desire. Below is a list of options.
Units
Knots (standard)
Mph
km/h
Size
80 mm (3 1/8")
57 mm (2 1/4")
Speed Range
0 to 100, 140, 160, 200, 220, or 250 knots
0 to 120, 160, 180, 220, 250, or 280 mph
0 to 200, 250, 300, 350, 400, or 450 km/h
Single or Multiple Revolutions
510° - standard, needle swings
more than 1 turn to give more resolution. Very popular in
sailplanes.
360° - single turn, easier to
read, but less resolution.
Custom - Factory applied markings
are great and not very expensive, but there is a 6 week
lead-time.
Großkinsky - Variable-Camberflap Ring
Optional ring which displays the
recommended flap setting for defined airspeed ranges and is adjustable
for wing loading. See the W-6001 and
W-7001 above.
Airspeed Indicator,
Model 6 FMS 212 - Popular with Schweizer Sailplane
Owners
80 mm (3 1/8")
Range: 0 to 120 mph
360° (1 revolution) needle swing
zero at 12 o'clock
Application
Indicate the speed of the aircraft relative to the surrounding air.
Part of the minimum prescribed instrumentation for any aircraft.
Technical Data
Black plastic housing, White scale on matt black background, See scale
drawing at right for installation dimensions, Graduation approximately
linear, Available with dual scale (km/h and knots) on request.
Weight: 0.205 kg (7.2 oz)
Note:
Operating range markings are not included as standard.
Custom color operating range markings are available for an additional
$30 with a 6 week lead-time. Or you can apply the range markings
yourself using the Airspeed Operating Range
Stickers. The factory applied markings are much nicer
than the stickers.
Manual-6FMS-80mm-Airspeed-Indicators.pdf
Application
Developed especially for gliding, the instrument shows airspeed on a
510° spiral scale. Graduations for low and average speeds are
greatly enlarged in order to permit speeds in the ranges of primary
interest to be read accurately and with ease.
Technical Data
Black plastic housing, white scale on matt black background, see scale
drawing at right for installation dimensions
Weight: 0.205 kg (7.2 oz)
Note:
Operating range markings are not included as standard.
Custom color operating range markings are available for an additional
$30 with a 6 week lead-time. Or you can apply the range markings
yourself using the Airspeed Operating Range
Stickers. The factory applied markings are much nicer
than the stickers.
Manual-6FMS-80mm-Airspeed-Indicators.pdf
Airspeed Indicator,
Model: 6 FMS 423 - Most Popular
80 mm (3 1/8")
Range: 0 to 160 knots
510° needle swing
zero at 12 o'clock
Application
Developed especially for gliding, the instrument shows airspeed on a
510° spiral scale. Graduations for low and average speeds are
greatly enlarged in order to permit speeds in the ranges of primary
interest to be read accurately and with ease.
Technical Data
Black plastic housing, white scale on matt black background, see scale
drawing at right for installation dimensions
Weight: 0.205 kg (7.2 oz)
Note:
Operating range markings are not included as standard.
Custom color operating range markings are available for an additional
$30 with a 6 week lead-time. Or you can apply the range markings
yourself using the Airspeed Operating Range
Stickers. The factory applied markings are much nicer
than the stickers.
Manual-6FMS-80mm-Airspeed-Indicators.pdf
Application
Indicate the speed of the aircraft relative to the surrounding air.
Part of the minimum prescribed instrumentation for any aircraft.
Technical Data
Black plastic housing, White scale on matt black background, See scale
drawing at right for installation dimensions, Graduation approximately
linear
Weight: 0.205 kg (7.2 oz)
Note:
Operating range markings are not included as standard.
Custom color operating range markings are available for an additional
$30 with a 6 week lead-time. Or you can apply the range markings
yourself using the Airspeed Operating Range
Stickers. The factory applied markings are much nicer
than the stickers.
Manual-6FMS-80mm-Airspeed-Indicators.pdf
Application
Indicate the speed of the aircraft relative to the surrounding air.
Part of the minimum prescribed instrumentation for any aircraft.
Technical Data
Black plastic housing, White scale on matt black background, See scale
drawing at right for installation dimensions, Graduation approximately
linear, Available with dual scale (km/h and knots) on request.
Weight: 0.205 kg (7.2 oz)
Note:
Operating range markings are not included as standard.
Custom color operating range markings are available for an additional
$30 with a 6 week lead-time. Or you can apply the range markings
yourself using the Airspeed Operating Range
Stickers. The factory applied markings are much nicer
than the stickers.
Manual-6FMS-80mm-Airspeed-Indicators.pdf
Application
Developed especially for gliding, the instrument shows airspeed on a
510° spiral scale. Graduations for low and average speeds are
greatly enlarged in order to permit speeds in the ranges of primary
interest to be read accurately and with ease.
Technical Data
Black plastic housing, white scale on matt black background, see scale
drawing at right for installation dimensions
Weight: 0.075 kg (2.6 oz)
Note:
Operating range markings are not included as standard.
Custom color operating range markings are available for an additional
$30 with a 6 week lead-time. Or you can apply the range markings
yourself using the Airspeed Operating Range
Stickers. The factory applied markings are much nicer
than the stickers.
Manual-7FMS-57mm-Airspeed-Indicators.pdf
Airspeed Indicator,
Model: 7 FMS 423 - Most Popular
57 mm (2 1/4")
Range: 0 to 160 knots
510° needle swing
zero at 12 o'clock
Application
Developed especially for gliding, the instrument shows airspeed on a
510° spiral scale. Graduations for low and average speeds are
greatly enlarged in order to permit speeds in the ranges of primary
interest to be read accurately and with ease.
Technical Data
Black plastic housing, white scale on matt black background, see scale
drawing at right for installation dimensions
Weight: 0.075 kg (2.6 oz)
Note:
Operating range markings are not included as standard.
Custom color operating range markings are available for an additional
$30 with a 6 week lead-time. Or you can apply the range markings
yourself using the Airspeed Operating Range
Stickers. The factory applied markings are much nicer
than the stickers.
Manual-7FMS-57mm-Airspeed-Indicators.pdf
Application
Indicate the speed of the aircraft relative to the surrounding air.
Part of the minimum prescribed instrumentation for any aircraft.
Technical Data
Black plastic housing, White scale on matt black background, See scale
drawing at right for installation dimensions, Graduation approximately
linear Note: The photo at right shows a unit in km/hr - which is
different from this unit.
Weight: 0.075 kg (2.6 oz)
Note:
Operating range markings are not included as standard.
Custom color operating range markings are available for an additional
$30 with a 6 week lead-time. Or you can apply the range markings
yourself using the Airspeed Operating Range
Stickers. The factory applied markings are much nicer
than the stickers.
Manual-7FMS-57mm-Airspeed-Indicators.pdf
Application
Indicate the speed of the aircraft relative to the surrounding air.
Part of the minimum prescribed instrumentation for any aircraft.
Technical Data
Black plastic housing, White scale on matt black background, See scale
drawing at right for installation dimensions, Graduation approximately
linear Note: The photo at right shows a unit in km/hr - which is
different from this unit.
Weight: 0.075 kg (2.6 oz)
Note:
Operating range markings are not included as standard.
Custom color operating range markings are available for an additional
$30 with a 6 week lead-time. Or you can apply the range markings
yourself using the Airspeed Operating Range
Stickers. The factory applied markings are much nicer
than the stickers.
Manual-7FMS-57mm-Airspeed-Indicators.pdf
Altimeter Scale Rings Prior to cross-country flight, the altimeter is usually set to field
elevation. Atmospheric pressure reduced to pressure at sea level
(QNH pressure) is then indicated from the Kollsman window.
Throughout the flight, the altimeter reads height above sea level.
In many instances, it is also desirable to know one's relative altitude
above a defined landmark, as well as height above sea level. One a
final approach, for example, it is essential to know one's height above
the landing field at any given time. Once the arrow on the
rotatable scale ring has been set to the elevation of the landing field,
altitude above the field can be read off the gradations at any time
until touchdown (reading corresponds to the QFE setting).
Further applications include the safe crossing of ground obstacles
(mountain ranges) or control zones, cases in which the difference in
altitude can be read directly once the ring has been correctly adjusted.
The scale ring has also proved particularly useful for destination
approach calculations in performance gliding. For more information
see the
W-4011 and W-4022 below.
Altimeter Scale Ring, 80
mm
Scale ring for use with 4 FGH 10 altimeters.
Prior to cross-country flight, the altimeter is usually set to field
elevation. Atmospheric pressure reduced to pressure at sea level
(QNH pressure) is then indicated from the Kollsman window.
Throughout the flight, the altimeter reads height above sea level.
In many instances, it is also desirable to know one's relative altitude
above a defined landmark, as well as height above sea level. One a
final approach, for example, it is essential to know one's height above
the landing field at any given time. Once the arrow on the
rotatable scale ring has been set to the elevation of the landing field,
altitude above the field can be read off the gradations at any time
until touchdown (reading corresponds to the QFE setting).
Further applications include the safe crossing of ground obstacles
(mountain ranges) or control zones, cases in which the difference in
altitude can be read directly once the ring has been correctly adjusted.
The scale ring has also proved particularly useful for destination
approach calculations in performance gliding.
Note: The standard W-4325 altimeter does not
accommodate this ring. However, a specially modified version can
be ordered that will work with this scale ring.
Altimeter Scale Ring, 57 mm
Scale ring for use with 4 FGH 40 altimeters
Prior to cross-country flight, the altimeter is usually set to field
elevation. Atmospheric pressure reduced to pressure at sea level
(QNH pressure) is then indicated from the Kollsman window.
Throughout the flight, the altimeter reads height above sea level.
In many instances, it is also desirable to know one's relative altitude
above a defined landmark, as well as height above sea level. One a
final approach, for example, it is essential to know one's height above
the landing field at any given time. Once the arrow on the
rotatable scale ring has been set to the elevation of the landing field,
altitude above the field can be read off the graduations at any time
until touchdown (reading corresponds to the QFE setting).
Further applications include the safe crossing of ground obstacles
(mountain ranges) or control zones, cases in which the difference in
altitude can be read directly once the ring has been correctly adjusted.
The scale ring has also proved particularly useful for destination
approach calculations in performance gliding.
Altimeters Altimeters measure static air pressure, which decreases with altitude.
The pressure-sensitive measuring element is a diaphragm capsule from which
the air has been removed (aneroid capsule), which reacts to the effect of
changing air pressure as the aircraft changes altitude. Tempered, aged
copper-beryllium diaphragms ensure highly accurate readings. Diaphragm
movement is transmitted to the instrument pointers by a linkage and
gearwheels - the entire unit is insensitive to shock and vibration. A
bimetal link compensates the effects of temperature change.
Features of Winter Altimeters
High measuring precision, temperature compensation, linear dial gauge
graduations, insensitive to shock and vibration, simple zero adjustment.
Winter Altimeter Details Table
The Winter Altimeter Details Table
contains a list of all the available altimeters from Winter. Details
such as weight, altitude range, etc. are
included for each unit. I stock the most commonly used units which are
highlighted in the table and included in the price list below.
But I can get any unit you desire. Below is a list of options.
Altimeter,
Model: 4 FGH 10, 20,000 ft 80 mm (3 1/8"), 3 pointer, , Range:
0 to 1,000 to 20,000 feet, Inch (Hg) pressure scale, zero
at 12 o'clock
3-pointer altimeter for measuring absolute and relative altitudes in the
0 to 20,000 ft range.
Indicating range: 0 to 1000 to 20,000 feet
Gradations: large pointer: 10 ft per line, small pointer: 100
feet per line, third pointer: 1000 feet per line
Technical Data
Airtight, black plastic housing. Connection via hose from static
pressure sensor to hose connector at the rear. Kollsman window with
Inch scale from 27.6 to 30.5 inches of Hg. See scale drawing at
right for installation dimensions. Weight: 0.345 kg (12.2 oz).
360° linear scale.
Note: The standard W-4325 altimeter does
not accommodate the optional
W-4011 scale ring. However, a specially
modified version of the altimeter can be ordered that will work with the
scale ring. The price of the special altimeter is the same as a
standard altimeter but the scale ring is extra. You can select the
special version when ordering. When ordering online the price for
the special altimeter includes the W-4011 scale ring.
Manual-4FGH10-80mm-Altimeters.pdf
Altimeter, Model: 4FGH
40 This altimeter is very popular with glider pilots because of its
small size. It fits nicely into the small instrument panels found in
many sailplanes. It is the only small (57 mm) altimeter for use in a
certificated airplane that I am aware of. However, there may be
some compromises due to its small size. Some pilots find it more
difficult to read than other (larger) altimeters. It seems obvious
to me, that the small size would make it more difficult to read, but I
have flown with them and I had no problem reading it. In 2007
Winter changed the 3rd pointer from a short white pointer to a long,
thin black pointer with a red colored tip (see photo at right).
That should make the unit easier to interpret in flight.
Also, the
accuracy appears to be less than that of other (larger) altimeters. The
Specifications indicate that the
altitude error may be as much as +/- 120 feet at 8000 feet - more at
higher altitudes. That doesn't concern or surprise me, but it is
good to be aware of it.
Size:
57 mm (2 1/4"), Range:
0 to 1,000 to 20,000 feet, Inch (Hg) pressure scale, zero
at 12 o'clock
3-pointer altimeter for measuring absolute and relative altitudes in the
0 to 20,000 ft range.
Indicating Range: 0 to 1000 to 20,000 feet.
Note: As specified in the
Specifications the unit will
indicate up to 15,000 m (49,215 feet) without any damage to the
altimeter. But it is calibrated only to 20,000 feet.
Scale graduation: large pointer: 10 feet per line, small pointer: 100
feet per line, third pointer: 1000 feet per line
Technical Data
Airtight, black plastic housing. Connection via hose from static
pressure sensor to hose connector at the rear. Kollsman window with
scale in inches of Hg. See scale drawing at
right for installation dimensions. Weight: 0.235 kg (8.3 oz).
360° linear scale. This altimeter can be fitted with a
W-4022 scale ring. Specifications
Manual-4FGH2040-57mm-Altimeters.pdf
Tubing Connector, Straight
metal, nickel plated, A little pricey, but much nicer than the plastic
connectors you can buy at any hardware store. If a plastic
connector gets nicked it may leak. That is not problem with these
metal connectors.
Tubing Connector, T
metal, nickel plated, A little pricey, but much nicer than the plastic
connectors you can buy at any hardware store. If a plastic
connector gets nicked it may leak. That is not problem with these
metal connectors.
Tubing Connector, +
metal, nickel plated, A little pricey, but much nicer than the plastic
connectors you can buy at any hardware store. If a plastic
connector gets nicked it may leak. That is not problem with these
metal connectors.
5-Way Tubing Quick Connector
Hose connections are not usually accessible when an instrument panel is
installed or removed. Winter offers a hose coupling with 5
connectors, to which all the hoses can be connected before the
instrument panel is installed. Once the panel is in position, all
that remains is to close the hose coupling.
Tank for Water
Condensation
This is a simple reservoir with 2 hose connectors. It is used to
collect any water that condenses inside the tubing at a low point.
It has a removable cap to facilitate removing the collected water.
This is a great way to keep water from damaging your sensitive soaring
instruments.
Instrument Screw
M4 x 20, black
The same screws supplied by Winter with all their instruments.
Non-magnetic. Aluminum with black coating. Price is for each screw.
Tool for Bezel Rings
May be used for removing and installing the bezel rings which hold the
glass face plate on the instruments. Adjustable for use with 57 and 80 mm diameter instruments.
Rental Option
If you think you need this tool for only a few days you can rent one for
$15 (plus shipping). I bill your credit card the full price and
then give you a partial refund as long as you return the unit in good
condition within 20 days.
Capacity Flask
0.45 L expansion tank with copperwool filling, for use with standard variometers.
Logarithmic and "sensitive" varios require a single
W-9015 0.9 L capacity flask, or 2 of these 0.45 capacity flasks.
Dimensions: 65 mm (2.56")
diameter, 280 mm (11.0") long
Weight: 0.18 kg (6.4 oz)
Note: Capacity flasks are included with all new variometers.
Capacity Flask
0.90 L expansion tank with copperwool filling, for use with "L" (logarithmic) and "S" (sensitive) varios.
Dimensions: 80 mm (3.15") diameter, 350 mm (13.78") long
Weight: 0.29 kg (10.2 oz)
Note: Capacity flasks are included with all new variometers.
Bezel ring, Grooved, 80
mm, for use with MacCready ring Most Winter variometers ship with a beveled bezel ring that does not
accommodate a MacCready Ring. The standard "beveled" bezel ring
can be removed (unscrewed) and this "grooved" bezel ring can be screwed
onto the front of the variometer. The MacCready Ring (not
included) has several spring-loaded ball bearings that ride in the
groove.
This part is included with the
W-5000, W-5002, W-5010
and W-5012 MacCready Rings.
The W-9010 Tool for Bezel Ring is highly
recommended for removing and re-mounting the bezel rings.
Bezel ring, Beveled, 80
mm This is the standard beveled bezel ring that ships with most Winter
Variometers. It does not accommodate a MacCready Ring.
The W-9010 Tool for Bezel Ring is highly
recommended for removing and re-mounting the bezel rings.
Bezel ring, Grooved, 57
mm, for use with MacCready ring Most Winter variometers ship with a beveled bezel ring that does not
accommodate a MacCready Ring. The standard "beveled" bezel ring
can be removed (unscrewed) and this "grooved" bezel ring can be screwed
onto the front of the variometer. The MacCready Ring (not
included) has several spring-loaded ball bearings that ride in the
groove.
This part is included with the
W-5000, W-5002, W-5010
and W-5012 MacCready Rings.
The W-9010 Tool for Bezel Ring is highly
recommended for removing and re-mounting the bezel rings.
Bezel ring, Beveled, 57
mm This is the standard beveled bezel ring that ships with most Winter
Variometers. It does not accommodate a MacCready Ring.
The W-9010 Tool for Bezel Ring is highly
recommended for removing and re-mounting the bezel rings.
button next to the product. 
