Fei Bao MiG-21 Fishbed Instruction Manual - Additional Items Required
Fei Bao MiG-21 Fishbed Instruction Manual (Draft Rev 0)
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the time to get everything pneumatic right the first time, as having your landing gear fail to
retract is not THAT bad, but having it fail to deploy can really ruin you day and the paint on the
bottom of your model.
D.
Additional Items Required
While the kit is comprehensive, there are additional parts required as follows:
Flight Controls Recommended Servo List
Ailerons (2): JR 3421
Elevator (2): JR 8611
Rudder (1):
JR DS3301, DS3421sa or equivalent
Flaps (2):
JR8611
NWS (1):
JR 8611 or equivalent size and appropriate torque.
Matchbox (2) – elevators & flaps as required depending on transmitter/receiver selection.
Pneumatic Systems
The air kit comes with a servo driven spool valve for the retracts, air brakes, and wheel brakes
but there are many “aftermarket” components available which can be used for these functions.
Several possible solutions are listed below. The individual builder may choose one of these
solutions or provide their own solution based on their experiences and preferences.
Retracts/Gear Doors
Solution #1
Retracts:
Provided spool valve & JR 341 servo or equivalent
Gear doors:
Pushbutton valve such as BVM #5753 Air Micro Switch
Solution #2
Retracts:
Provided spool valve & JR 341 servo or equivalent
Gear doors:
Provided spool valve & JR 341 servo or equivalent
Electronic sequencer
Solution #3
Ultra Precision UP-3 valve & JR 341 servo or equivalent
Solution #4
Retracts:
Jet-Tronics Dual Action electronic pneumatic valve
Gear doors:
Jet-Tronics Dual Action electronic pneumatic valve
Electronic sequencer
Wheel Brakes
Solution #1
Provided spool valve & JR 341 servo or equivalent (non-proportional brakes)
Solution #2
Proportional brake valve (Ultra Precision UP-6 or BVM Smooth-Stop) & JR341 servo or
equivalent
Solution #3
Jet-Tronics Low Loss electronic brake valve
Airbrakes
Solution #1