QuiQue's Aircraft 102” YAK 54 Assembly & Instruction Manual - page 6
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learn which is the best direction and the amount needed. You will be surprise how much
influence a small amount off at center will affect the performance.
HOOKING THE SERVOS TO THE RUDDER
Connect two or three servos to the Match Box and then the Match Box to the receiver and
set sub trim and trim to neutral position, install a good quality aluminum servo arm as
shown in the assembly manual, place all arms perfectly perpendicular to the main servo
axis. If there is difference adjust the Match Box to the desired position. Install to the
rudder surface the control horns, the best for this case will be the HD Dubro rudder
control horn as we suggest in the assembly manual. Now you need to prepare the cables
and connect them to the servo arm. Connect the other end to the control horns. The servo
arm length 3 ½ in. and the control ho rn again from hinge line is 1 7/8 in. each side.
Adjust the cables in order to set the rudder at neutral position. After you fly the airplane
for 3 to 5 flights you will need to readjust the cables because they will get to “their
place”. After that you sho uld check the cables every 50 flights or so.
HOOKING THE SERVO TO THE THROTTLE
Nothing is different here from what you’ve been doing but a few things to look at. Try to
have similar number (%) at your high and low throttle settings. If these numbers are not
similar then your throttle response will change. For that try to set the carburetor butterfly
at middle range, and then set your throttle stick at center, then adjust the top and bottom
end. The ideal % will be if you are like 100% for full open and 100% for idle with trim at
center. To reach that 100%, play with the clevises position at the servo horn. With the
trim at center then you can kill the engine by shifting the throttle trim to full down
position. At this value the throttle will be lineal, the n if you do not like how the engine
responds, use the throttle curve function if your TX program has it. My personal feeling
on this is to not use throttle curve as I like to feel the engine how it is with out any
electronic feeling in between.
Advice, use a good quality servo for the throttle and as mention before an analog type, I
have seen many crashes because the throttle servo failed. You know accidents happen
when something fails, your throttle servo is as important is any other servo on board.
RADIO SET UP
Your radio set up is a very important side of the airplane for the very top performance.
All of the mechanical and aerodynamic adjustments have been done, and please keep in
mind if you change any of these mechanical values all the electronic values will change.
So let’s have a look to the radio programming.
After you do the servo connection as I have described above, you will need to adjust the
rates. For that I suggest for you to adjust all servo travel to full position. I have given you
above the servo size arm and the links position at the control horn however different
radios will give you different travel. So to avoid mistakes I would like to talk about the
measurements at the airplane rather than percentage.
While you adjust the maximum trave ling for each servo (rudder, elevator and aileron)
you are adjusting the high rate that you are going to need to do the 3D aerobatics.
So go and check the following values.