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Mounting instructions
for the retractable undercarriage
FEMA retractable undercarriages are delivered completely assembled, you just have to mount
on your own the wheel brake, the additional kit for spring-loaded mounting as well as the
gas pressure spring. Please read the mounting instructions carefully and stick to them to
avoid problems.
Mounting of the wheel brake
The mounted wheel brake is clearly visible in figure (I). Please regard the following steps.
When disassemble the bolt make sure that the recuperation spring does not burst open. Attach
the end of the recuperating spring to the oscillating cranks with the help of a string. The screws
(1) are secured with adhesive and have to be heated up with a soldering bit to approximately
80°C. All retractable undercarriages with a pierced locking lever that have been delivered up to
now can additionally be equipped with wheel brakes.
Mounting of the reversing lever
If the retractable undercarriage is mounted spring-loaded the servo for operating the wheel
brake has to be attached to the frame of the undercarriage. The wheel brake is applied via
the reversing lever (stock number 9810/22). The mounted reversing lever is clearly visible on
figure (II). Use the enclosed string (twofold) to connect reversing lever and brake lever. Secure
the tied spot with adhesive.
Mounting of the additional kit for spring-loaded mounting
The additional kit for spring-loaded mounting as well as the gas-pressure spring with the
assembling gear contain all necessary parts. The mounted articulation piece (1) and the gas
pressure spring (2) are clearly visible on figure (II). For the undercarriages with the stock
numbers 9800A and 9810A the articulation piece is centred with the enclosed distance rings.
fi gure I
1
fi gure II
9810/22
2
1
1
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Table of Contents
Summary of Contents for Fema 9800A
- Page 1 The mounted articulation piece (1) and the gas pressure spring (2) are clearly visible on figure (II). For the undercarriages with the stock numbers 9800A and 9810A the articulation piece is centred with the enclosed distance rings. fi gure I fi...
- Page 2 Attach the retractable undercarriage carefully to avoid problems in flight practice. Please regard the following notes thoroughly. Up to four servos can be attached to the undercarriages with the stock numbers 9800A, 9810A and 9820A. To the undercarriage with the stock number 9830 up to two servos can be attached.
- Page 3 Mounting instructions for the retractable undercarriage Preparation and mounting of the bulkheads Use plywood 8-12 mm thick. Prepare a cardboard template according to the cross-section of the fuselage. Ascertain the mounting height of the retractable undercarriage in the fuselage (between 1-5 cm) from the lower edge of the support. Then cut the openings for the support into the template and try if it fits into the fuselage.
- Page 4 Mounting instructions for the retractable undercarriage Wheel brake The wheel brake is applied by a servo and thus can be used very sensitively even despite the high brake force. If the retractable undercarriage is attached firmly, the brake servo can be mounted either directly to the frame of the undercarriage or to the front fastening bulkhead.
- Page 5 Mounting instructions for the retractable undercarriage Fix the lower limit stop in such a way that the retractable undercarriage rests with an initial stress of 1-2 mm. The lateral guide should not have more than 0.5 mm of positive allowance. We recommend to screw plastic ledges onto the bulkhead for the lateral guide that can then be adjusted very precisely.
- Page 6 fi gure III scale model:measures in mm servo holder *without wheel, servo holder and bow stock number weight model weight 9800A 140 - 165 680 g 12 - 25 kg 9810A 110 - 127 420 g 8 - 16 kg...
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