17
that you do not have the top of the line radio and you are missing one or both of these
functions you can program your mixing function.
For the servo rudder servos I will suggest also to use a Match Box for best servo
operation.
For throttle servo I will recommend a top quality analog servo, such JR8231. The throttle
servo needs to be analog for better handling of the engine vibration. Digital servos will
not be forgiving while the analog will, making this type of servo best for the throttle
application.
HOOKING THE AILERONS TO THE SERVOS
Use good quality aluminum 1 ¼” servo control horn; connect the ball link at the outer
hole. At the aileron horn, use two Heavy duty Dubro control horns. Measuring from
hinge line to ball link point connection should be at 1 5/8 inches for both horns. The inner
control horn will appear to be shorter because we are measuring from the hinge line and
the aileron is thicker at the inner area. Hook the servos arms to the control horns using
good quality 4/40 rods such Hangar 9 titanium rods. Make a quick check to see if the
servo direction is correct. Make sure the aileron sub trim and trim at your radio program
are at zero. Once it is at zero install the servo horn to be perpendicular to the main servo
axis. If you find the servo horn is not perfectly perpendicular, slightly adjust the Match
Box. Once all of this is done, adjust the pushrod to the proper length to set the aileron
surface at a perfectly neutral position. With your radio set at high rate and traveling set at
maximum, check full deflection right and left and adjust the Match Box for maximum
traveling and both servos the same for best servo operation. Do the same thing with both
wing panels. It is very important both ailerons travel the same distance up and down, if
not it is called aileron differential. In the case of this 102” Yak-54 it will not need any
differential, so make sure that both ailerons are traveling the same distance up and down.
If the ailerons are not traveling same, then the aileron rolls will not be clean and axial and
will look more like barrel rolls. Remember it is important to have the servo arm
perpendicular to the main axis of the servo and the sub trim and trim of your radio at
zero; this will make the job much simpler.
HOOKING THE ELEVATORS TO THE SERVOS
Install the servos and connect to their respective channels as was suggested on servo
connections. Set the sub trims and trim at zero and install a good quality aluminum servo
horn perpendicular to the main servo axis with a length of 1 ¼”. Install the Heavy duty
Dubro control horn. Measuring from the hinge line to the ball link’s bolt should be 1 ¼
in. Adjust a good quality 4/40 rod such as Hanger Nine’s titanium rod to the right length
in order to set the elevator at ne utral position. Make sure both halves are traveling in the
right direction. It is important that both halves of the elevator travel the same up and
down, because if they don’t, your airplane will not track straight at corners. Best way to
check if the elevators are traveling the same it to measure at the counter balance leading
edge or look at them from the back. If there is any difference on the travel, use the travel
adjustment functions. Some times the travel adjustment function will not be as perfect as
needed, so then use the sub trim to offset a bit at neutral position and re-adjust the rod to
the right length to keep the elevator at neutral position. By playing with this you will
Содержание 102" YAK 54
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