Fei Bao MiG-21 Fishbed Instruction Manual (Draft Rev 0)
Page 23 of 24
Drill a hole at each end of the slot such that the drill diameter is the same as the width of the
slot. Using a knife, saw, or cutoff wheel, remove the remaining slot material (colored in red in
the photo below). Screw the servo cover into place and reattach the linkage to the servo arm.
Check that the servo arm and linkage does not bind on the cutout. Trim/sand the edges of the
slot as required.
Preparing for the Maiden Flight
Thoroughly examine all aspects of your model to ensure that you haven’t missed or forgotten
anything. Check that all fasteners are tight with blue Loctite (if applicable) applied to the
threads. Make sure all wiring, air lines, linkages, and components are secure. Perform a leak
check on the pneumatic systems to make sure that there are no leaks when the landing gear is
down/up, brakes on/off, and airbrakes open/shut. Check that the landing gear retract/extend
properly and that the gear doors and air brakes open/shut without binding. Fuel and defuel the
aircraft to ensure that all fuel tanks completely fill and completely empty. If you find any
problems, correct them BEFORE flying.
“It is far better for your model to be on the ground and you wishing it was in the air
than it is for your model to be in the air and you wishing that it was on the ground!”
Test run the engine to make sure that it starts and performs correctly. Conduct some taxi tests
to ensure that the model tracks straight and that the wheel brakes evenly stop the model.
Maiden flights can be stressful enough without worrying about technical problems or potential
surprises and equipment failures. It’s generally far easier to fix a problem back in your
workshop than at the flying field. Take your time and ensure that you have checked and tested
all systems.
Congratulations, you’ve completed building your new Fei Bao MiG-21!
