High-quality retractable landing gear with accessories for ... · PDF file · e-mail:...
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www.fema-modelltechnik.de · e-mail: [email protected]
High-quality retractable landing gear with accessories for the ambitious model maker
Program for retractable landing gear
Our products are available at specialist shops or you can purchase them directly from us.
For direct delivery, we charge the following shipping costs:
Germany: Up to a weight of 5 kg ...................... 7,00 €
Abroad: Up to a weight of 5 kg....................... 18,00 €
For a higher weight and delivery outside EU we will calculate
the shipping costs individually.
All shown prices include VAT.
Bank details
Sparkasse Wolfach · D-77709 Wolfach
IBAN DE49 6645 2776 0000 019449
BIC SOLADES1WOF
Delivery
All products in this catalogue and the delivery of these products
are subject to change without notice.
FEMA Retractable landing gearThe FEMA retractable landing gear sets new standards
in matters of stability, functionality, modularity and
price. The landing gear is available in four sizes for
wheel diameters of 70 - 165 mm.
FEMA retractable landing gear for large
scale gliders with FES (Nose drive FES)
This retractable landing is is mainly similar to our
standard retractable landing gear with the exception of
extended swinging arms. The retractable landing gear
with FES is available in two sizes for wheel diameters
of 90 – 127 mm.
FEMAwheelsplusFEMAwheelsplus with fi ber-reinforced rims and alu-
minium hubs are designed to satisfy the highest
demands and are suitable for gliders and motorised
aircraft equally. No more fl at tires!
Axles for motorised aircraftWe provide axles for motorised aircraft models made
out of high-quality tempering steel that are complemen-
tary to our FEMAwheels.
Gas spring LiftlineThe gas spring Liftline is suited for all our retractable
landing gears and or common application in model
making, e.g. landing gear, canopy, retractable power-
unit etc.
All our products are
made in Germany
NEW!
NEW!
Program for retractable landing gear
www.fema-modelltechnik.de · e-mail: [email protected]
www.fema-modelltechnik.de · e-mail: [email protected]
l FEMA-Retractable undercarriages for models
in the scale 2,0-4,5.
l Optional: With springs and wheel brake.
l New, weight-optimized design.
l New, wheel cover.
Basis-chassis Option: supplement sets
for fi xed mounting for spring-loaded mounting
between two fuselage bulkheads
Option:
Highly effective wheel brake
EZFW-Programm
FEMA-Retractable undercarriages for
big-scale models set new graduations
concerning quality and price!
www.fema-modelltechnik.de · e-mail: [email protected]
possible damping even on the roughest runways. The
damping can be adjusted to the weight of the model
by three damping variations all of them available for
immediate delivery. The required springiness of the gas
pressure spring can be calculated as follows:
Springiness (N)=model weight in kg x 40 (1kg~t10N)
Gas pressure springs are available with a springiness of
200N, 300N, 400N. Models of more than 10kg require
the attachment of 2 springs, more than 20kg require the
attachment of three springs.
The additional kit for spring-loaded mounting includes
two stable aluminium angles with borings for the
mounting. They are attached to the fuselage bulkhead
with the same screws as the retractable undercarriage.
This makes it possible to prepare the fuselage bulkhead
as shown in the illustration and you obtain enough room
for building in the moulded seat.
For the safety of your model, we recommend the
attachment of a wheel brake independently of whether
the undercarriage is attached fi rmly or spring-loaded.
The wheel brake is operated by a servo and it can be
applied extremely sensible though its high brake power.
If the retractable undercarriage is attached fi rmly, the
brake-servo can be mounted on the front fastening-
bulkhead or directly on the chassis of the undercarriage.
The retractable undercarriages are available
in four sizes:
Stock number 9800A
for models at a scale of 2.0 – 2.8
for wheel diameters of 165, 152 and 140mm
Stock number 9810A
for models at a scale of 2.5 – 3.2
for wheel diameters of 127 and 112mm
Stock number 9820A
for models at a scale of 3.3 – 3.7
for wheel diameters of 100 and 90mm
Stock number 9830A
for models at a scale of 3.8 -4.5
for wheel diameters of 70 and 82mm
A retractable undercarriage is essential for scale
and semi-scale models. The “FEMA retractable
undercarriages” are being used successfully for years
and have demonstrated their ability in fl ight practice.
Mr Gardemin wrote in his test report about retractable
undercarriages:
»FEMA retractable undercarriages are without any
technical paraphernalia but they are designed 100%
functional and sturdy.«
We still feel obliged to this statement, now and in future.
The new generation of FEMA retractable undercarriages
for large sail-planes is a logical development of the
proven undercarriages which we have been producing
since 1988. The retractable undercarriages are designed
modularly and thus can be adapted perfectly to different
conditions. The undercarriages can be installed either
fi rmly between two fuselage bulkheads or spring-loaded.
If they are used together with FEMA solid tires, these
retractable undercarriages withstand even extreme
strains. The infl exible mounting between two bulkheads
of the fuselage is perfect for standard models. It is
advisable to use spring-loaded carriages for really soft
touch-downs. The gas pressure spring makes the best
Retractable undercarriages
We have made the mounting of the springloaded
version considerably easier and also made room for
the attachment of the moulded seat.
Wheel cover from glass fi bre reinforced plastics. The wheel cover is an ideal splash guard and pro-
tects the inside of the fuselage against spraying water and dirt during take-off and landing. You just have to slide the wheel cover between the rocker arms of the retractable undercarriage and attach it with silicone adhesive.The wheel cover is retrofi ttable for all FEMA undercarriages, that have been previously delivered.
www.fema-modelltechnik.de · e-mail: [email protected]
If it is attached spring-loaded, the brake-servo has to be
attached to the chassis of the undercarriage in order to
ensure the safely functioning of the wheel brake when the
retractable undercarriage is spring defl ected. If the brake-
servo is attached to the chassis of the undercarriage,
an additional reversing lever (stock number 9890/22) is
necessary.
The retractable undercarriages have the following outstanding
features:
l Reliable functions - Bolt mechanisms on both fi nal positions.
l Highly effi cient wheel brake - safety for model and operator.
l Spring-loaded installation - for really soft touch-downs.
l Robust attachment in the fuselage - between two
plywood bulkheads.
l Installation height in the fuselage is relatively variable .
l Installation of 1 to 4 servos is easily possible
in connection with the servo holder (landing gear rudder,
vertical rudder and elevator rudder)
l The wheel frame made out of spring steel ensures a safe
function of the ventral fl aps.
l A detailed instruction manual makes the installation as
easy as possible. With these retractable undercarriages,
we set new standards concerning quality, modularity and
price.
We are looking forward to equipping your sail plane with a
FEMA-retractable undercarriage.
servo-holder
hanger
Degree picture: masses in mm
Retractable undercarriages
Part number A B C D E F Weight* Model-weight
9800A 272 80 68 140 - 165 66 92 680 g 12 - 35 kg
9810A 220 72 60 110 - 127 56 68 420 g 8 - 20 kg
9820A 196 62 50 90 - 100 46 60 350 g 5 - 12 kg
9830A 172 54 44 70 -80 36 54 200 g 3 - 8 kg
*without wheel, servo-holder and wheelbow
Retractable undercarriages
www.fema-modelltechnik.de · e-mail: [email protected]
10
35
8,5
d
M2
10
Spare parts for retractable undercarriages
Retractable undercarriages
If functionality, operational security and quality are decisive points for your applications, then our control arm is
the right choice. The control arms have an ideal holding force (without abrading a surface on the shaft) and can be
positioned very sensitively. You can use clevis M3 or spherical head M2.
Stock number 9890/30 ........ control arm with 4 mm hole
Stock number 9890/31 ..........control arm with 5 mm hole
Stock number 9890/32 ........ control arm with 6 mm hole
The retractable undercarriages are shipped serially with the control arm.
Z-shaped servo mount and angled clevis, suitable for all FEMA retractable undercarriages
The Z-shaped servo mount solves the problem of the slanted guidance in order to extract/detract the retractable under-
carriage. Therefore, the servo can be mounted in a horizontal position for a smooth and linear operation of servo lever
and undercarriage lever. It is recommended to operate the servo with a deflection of 180° - thus the tilted clevis is
the ideal addition. The Z-shaped servo mount includes all necessary drill-holes for the assembly on the retractable
undercarriage and for the installation of a standard servo. The L-shaped servo mount is ideal for the assembly of the
brake servo.
Material: Aluminium – powder-coated.
Stock number 9890/60 ......... Z-shaped servo mount – fi nished for all standard servos, 40x20 mm
Stock number 9890/62 ......... Tilted clevis with threaded bar M3
Stock number 9890/64 ......... L-shaped servo mount – fi nished for all standard servos, 40x20 mm
www.fema-modelltechnik.de · e-mail: [email protected]
Retractable undercarriages
Retractable undercarriages for wheel diameter 165, 152 and 140mm, for models to a scale of 2,0 to 2,8 - model weight 12-35kg
Stock number9800A ..............assembled completely without wheel and bow
9801A ..............assembled completely with VG-wheel 140mm diameter and bow
9802A ..............assembled completely with VG-wheel 152mm diameter and bow
9803A ..............assembled completely with VG-wheel 165mm diameter and bow
9800/10..........wheel brake for wheel diameter of 140mm
9800/11 ..........wheel brake for wheel diameter of 152mm
9800/12..........wheel brake for wheel diameter of 165mm
9800/14..........Wheel cover from glass for wheel diameter of 140-165mm
9800/15..........additional kit for spring-loaded mounting without gas pressure spring
Retractable undercarriages for wheel diameter 127 and 112mm, for models to a scale of 2,5 to 3,2 - model weight 8-20kg
9810A ..............assembled completely without wheel and bow
9813A ..............assembled completely with VG-wheel -112 mm diameter and bow
9814A ..............assembled completely with VG-wheel -127 mm diameter and bow
9810/10..........wheel brake for wheel diameter of 112 mm
9810/11 ..........wheel brake for wheel diameter of 127 mm
9800/14..........Wheel cover from glass for wheel diameter of 112-127mm
9810/15..........additional kit for spring-loaded mounting without gas pressure spring
Retractable undercarriages for wheel diameter 100 and 90mm, for models to a scale of 3,3 to 3,7 - model weight 5-12kg
9820A ..............assembled completely without wheel and bow 9823A ..............assembled completely with VG-wheel -90 mm diameter and bow 9824A ..............assembled completely with VG-wheel -100 mm diameter and bow 9820/10..........wheel brake for wheel diameter of 90 mm 9820/11 ..........wheel brake for wheel diameter of 100 mm 9800/14..........Wheel cover from glass for wheel diameter of 90-100mm 9820/15..........additional kit for spring-loaded mounting without gas pressure spring
Retractable undercarriages for wheel diameter 82 and 70mm, for models to a scale of 3,8 to 4,3 - model weight 3-8kg ........
9830A ..............assembled completely without VG-wheel and bow
9833A ..............assembled completely with PVC-wheel 70mm diameter and bow
9834A ..............assembled completely with PVC-wheel 82mm diameter and bow
9830/10..........wheel brake for wheel diameter of 70 mm
9830/11 ..........wheel brake for wheel diameter of 82 mm
9800/14..........Wheel cover from glass for wheel diameter of 70-82mm
9830/15..........additional kit for spring-loaded mounting without gas pressure spring
Accessories, suitable for all retractable undercarriages
9890/200 .......gas pressure spring, 200N springiness
9890/300 .......gas pressure spring, 300N springiness
9890/400 .......gas pressure spring, 400N springiness
9890/20..........servo holder, suitable for all retractable undercarriages
9890/22..........reversing lever for wheel brake, suitable for all retractable undercarriages
Tuning parts, suitable for retractable undercarriages
9890/60..........Z-shaped servo mount, suitable for all standard servos
9890/62..........Angled clevis with threaded rod M3
9890/64..........L-shaped servo mount, suitable for all standard servos
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Tuning parts for retractable undercarriages
9800/16 ...........Axle with accessories9810/16 ...........Axle with accessories9820/16 ...........Axle with accessories9830/16 ...........Axle with accessories9890/25 ...........Wheel bracket made out of stainless steal (please specify the wheel diameter when placing your order)9890/30 ...........Control arm made from aluminium for the series 9830A and 9820A9890/31 ...........Control arm made from aluminium for the series 9810A9890/32 ...........Control arm made from aluminium for the series 9800A
Examples for the assembly
Courtesy of the magazine »FMT - Bauen und Fliegen«,
issue from March/April 2009, page 31.
Author: Lothar Beyer
Courtesy of the magazine »Modell«, issue from July 2007,
page 74.
Author: Ralph Müller
Retractable undercarriages
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Servo holder
Bracket
Dimensional drawing: Measurements in mm
Retractable undercarriage by FEMA
for self launching large model gliders
with nose drive (FES).
Following the general trend that more and more
large model gliders are equipped with a nosemounted
motor, this retractable undercarriage represents the
perfect solution.
We extended the rocker arm by 30 mm to guarantee
a smooth take off from the ground for large model
The retractable undercarriage is suited for wheels
with a diameter of 112 and 127 mm and is essentially
identical with the well-proven retractable undercarriage
of type 9810A.
Stock number A B C D E F Weight* Model weight
9860/FES 246 72 60 110 - 127 66 98 440 g 8 - 20 kg
9870/FES 216 62 50 90 -100 50 85 330 g 5 - 12 kg
*without wheel, servo holder and bracket
Retractable undercarriages
Stock number Item Price in EURO/piece Netto Brutto
FES/Retractable undercarriages for wheel diameter 127 and 112 mm, for models to a scale of 2.5 to 3,2
9860/FES assembled completely without wheel and bow.
9863/FES assembled completely with FEMAwheel 112mm diameter and bow.
9864/FES assembled completely with FEMAwheel 127mm diameter and bow
9860/10 wheel brake for wheel diameter of 112mm.
9860/11 wheel brake for wheel diameter of 127mm.
Any other accessories are identical with the accessories for the product range of 9810A.
FES/Retractable undercarriages for wheel diameter 100 and 90 mm, for models to a scale of 3,3 to 3,7
9870/FES
9873/FES
9874/FES
9870/10
9870/11
Recommended servo for the activation of the the landing gear
FEMA‘s retractable undercarriages are equipped with a balance spring, and thus only a minimum effort is required
to extend and retract the landing gear. A higher effort is needed to open the landing gear door as it is activated
by the landing gear. Basically every standard servo with a regulating time of more than 0.5 sec/40° is suited for
the activation of the retractable landing gear. For a smooth motion sequence we recommend a low-speed steering
servo with an amplitude of 180°. The use of the Z-shaped servo mount with stock number 9890/60 and the an-
gled clevis with stock number 9890/62 guarantees an ideal straight linkage. If you mount the landing gear doors
according to our suggested installation we recommend the following torque for the servo:
Model 9800A .................................. 80 – 120 Ncm
Model 9810A and 9860/FES ............ 60 – 80 Ncm
Model 9820A and 9870/FES ........... 40 – 60 Ncm
Model 9830A .................................. 30 – 40 Ncm
Recommended servo for the wheel brake:
Model 9800A .................................. 60 Ncm
Model 9810A and 9860/FES ............ 50 Ncm
Model 9820A and 9870/FES ............ 40 Ncm
Model 9830A .................................. 30 Ncm
4 kg
A servo with a torque
of 40 Ncm.
16/12/16
Retractable undercarriages
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Stock number Ø Wheel width Hub width Weight Hub bore
9920/90 90 mm 32 mm 40 mm 95 gr. 6,1
9920/100 100 mm 36 mm 40 mm 105 gr. 6,1
9920/112 112 mm 40 mm 40 mm 135 gr. 6,1
9920/127 127 mm 44 mm 44 mm 175 gr 6,1
9920/140 140 mm 48 mm 44 mm 220 gr 6,1
9920/152 152 mm 50 mm 44 mm 270 gr. 8,1
9920/165 165 mm 53 mm 44 mm 310 gr. 8,1
9920/178 178 mm 56 mm 44 mm 350 gr. 8,1
NEW!
Today we introduce our new wheels programme
that we developed according to your needs.
By means of a complex tool development in co -
operation with well-known rubber and plastics
processors we managed to improve the quality
notably compared to the present solid rubber
wheels. Larger rims support the tire in case of
lateral strain in an optimal way so that even
extreme crosswind landings can be absorbed
easily. All sizes are now supplied with guide grooves to keep your model on track.
FEMA wheels with glass fi bre reinforced rims and aluminium hubs are designed to meet the highest demands and are
suited for engine models as well as for large scale gliders. The wheels are extremely resilient and have ideal damping
features. Even the load of the model weight for several hours in midsummer temperatures does not lead to the dreaded
fl at tire. Despite their extreme stability, the wheels are very light. With FEMA wheels you don’t have to worry about
infl ating the valves.
Neu: FEMAwheels plusWe improved the rubber quality of our wheels and could thus signifi cantly increase the resilience as well as the abrasion
and tear resistance.
Made in GermanyMade in Germany
Gas springs
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L
spring deflexion
6,1 6,1
Ø 1
5
Ø 6
Stock no. resilience spring defl exion L
910 50N/ 5kg 20 mm 106,5
911 100N/ 10kg 20 mm 106,5
912 150N/ 15kg 20 mm 106,5
913 200N/ 20kg 20 mm 106,5
914 300N/ 30kg 20 mm 106,5
915 400N/ 40kg 20 mm 106,5
Stock no. resilience spring defl exion L
920 50N/ 5kg 40 mm 146,5
921 100N/ 10kg 40 mm 146,5
922 150N/ 15kg 40 mm 146,5
923 200N/ 20kg 40 mm 146,5
924 300N/ 30kg 40 mm 146,5
925 400N/ 40kg 40 mm 146,5
For the universal implementation in model making, i.e.
undercarriages, self launch system, cockpit canopy, etc.
Borehole of 6.1mm on both sides
15/12/16
Axles for models with engine
We deliver axles for models with engine made out of high-quality
tempering steel that match our solid tire wheels of a diameter of
90-178 mm and a hub diameter of 6.1/8.1mm. The threaded
length is measured in such a way that it is possible to attach also
the wheel cover. A nut secures the attachment of the wheel. The
bearing of the axle is made out of high-quality aluminium and has
a diameter of 10/12 mm. The axle is attached to the smooth stem
in order to avoid a notch effect that is common at an attachment
at the thread.
9940......... 2 pair Tempering steel axles 6mm for models up to a weight of 12 kg.
9942......... 2 pair Tempering steel axles 8mm for models up to a weight of 20 kg.
AB C
d1
d2
D1
D2 Dimensionchart/weight (Dimensions in mm)
Typ A B C d1 d2 D1 D2 Weight
9940 85 68 13 6 M6 10 M10 55 gr.
9942 95 75 16 8 M8 12 M12 95 gr.