Monocoupe 90A
Page 9 Copyright © 2016 Jim Young and T& J Models
Assemble the elevator push rod as
shown on the plans and install. Use
plastic tubes as guides for the rudder
pull-pull cables.
Any iron on covering is suitable. The
Prototype is covered with 21
st
Century
Painted Fabric. There are plenty of
classic color scheme possible. The
windshield is cut from clear plastic from
the template on the plans.
The prototype is flying with a Scorpion
3020-16 spinning a 12x6 Xoar wooden
prop, a Castle Creations Phoenix 45
ESC, and a 3S 3300mAhr LiPo pack.
Since there are 6 servos, a separate
switching BEC is used to power the
radio.
The recommended servos are HS-65 for
the elevator, rudder, and flaps. The
ailerons can be HS-45’s or HS65s.
Recommended control throws are:
Ailerons: +/- 3/8”
Flaps: 45 degrees
Elevator: +/- 3/8”
Rudder: +/- 1”
Flap to Elevator Mix: 20% down
Flying
The Monocoupe 90A is not a hard plane
to fly but it is not a trainer being a tail
dragger. Take offs require rudder input
to keep it tracking straight. Once in the
air you’ll find that it can do basic
aerobatics including loops, rolls, and
stall turns. The rudder is very effective,
and the roll rate is typical for a high
wing plane.
The stall is very gentle, and depending
on the elevator throws non-existant.
The flaps are not necessary, but add
another element of flight to experiment
with. Without elevator input, deploying
the flaps will cause the ‘coupe to nose
up, so down elevator is needed to
maintain level flight. I have the flaps
setup on a flight mode switch with the
elevator trim separate for each mode.
This allows for quick setup of the
elevator compensation for flaps. As you
deploy the flaps in the different flight
modes, simply add down elevator trim to
maintain level flight. When the flaps are
retracted, the elevator trim returns to
normal flight mode trim setting.
