Another method to get landing flap operation with a 5 channel system is use
a linkage in the plane similar to the elevator trim arrangement of reed control
systems A five servo installation is needed Make a "trim bar" between elevator
and flap servo See FIG. 17. Landing flap mode can be set up with four channel
systems by coupling with the throttle servo, but it has not been proven out yet
Coupling Bar as in reed systems
Trim Bar There are many ways to
accomplish this method
Note Servo is at 100° position
lor stunting Move toward
0° for landing flap position
5th Channel Servo
Flap
Elev Servo
Elev
MECHANICAL COUPLING
FIG. 17
PREPARATION FOR FLYING EXPERT
As mentioned earlier, the control surfaces should have the following move-
ments ailerons ± 10 degrees, elevator ± 15 degrees rudder ± 30 degrees, and
flaps ± 5 degrees. This flap/elevator coupling is the same whether mechanical
or electronic systems are used If landing flap mode is available, the flaps should
go down to 25 degrees.
The Center of Gravity should be measured (without fuel in the tank) at
6 to 7 inches forward of the hinge line on the wing Move the battery pack
around to achieve this Set up the surfaces with transmitter trims in neutral,
then apply up-trim at the transmitter to hold level flight or give a slight climb
Although the engine is well cowled, it is adequately cooled even with a
muffler Have a f u l l fuel tank on the first flights Use a 10 x 5 Top Flite propeller,
after a few flights accomplished, go to a 1 0 x 6 Top Flite Power prop
As the model sits level on the ground, a positive rotation is required for
lift-off From grass use a slightly oversized nose wheel to have a positive angle
of attack As an expert flyer, you already know how to trim a model Make
several short flights adjusting the clevises to move the transmitter sticks back
to neutral The model should be adjusted for level hands-off flight upright and
with down trim applied for inverted flight Make these checks at 3/4 throttle
At take-off, propeller slipstream effect gives a left yaw Compensate with
rudder keeping the wings level with ailerons, if necessary Once you have ac-
celerated well past stall speed, the yaw disappears Side thrust can introduce
more problems than it is worth on stunt ships With the Nobler, it is easily
accounted for by the effective rudder
When landing, the model is stable and amazingly slow Avoid the floating
in ground effect by closing the throttle during the downwind leg of your landing
approach when the plane is exactly opposite the landing area. Full stall landings
are best.
9
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