Advertisement
Composite-ARF Yak 55 (2.1m/83")
-
Did you fit short Tygon or silicone tube pieces over all the clevises?
-
Did you tighten the M3 locknuts against all the clevises?
-
Are the crimp tubes crimped up nice and tight on the rudder cables?
-
Have you put clear tape over the end of the rudder hinge wires and on the stab bolts ?
Don't forget to tighten the large Plastic M6 wing retaining nuts before flying!
-
For added security add one small drop of loctite/thread locking compound on all engine
mounting bolts, and those that hold the servo arms to the servos, especially important
with digital types.
Then you can go on set up all the linkages, control throws and R/C system as described below.
Centre of Gravity:
For the 1st flights set the Centre of Gravity
at 150 - 160mm (6 - 6.4") from the trailing
edge at the wing tip. Hold it with a helper
at both wing tips in this position and make
sure the plane balances horizontally, or
slightly nose-down. This is the 'pattern' CG
position.
After you are confident with the plane, you
can move it backwards up to 15mm, but
this is definitely a '3D/Freestyle' CG setting
and should not be used for the first flights.
With this rearward CG you will need to use
the high rate control throws and more
exponential, as described below.
Don't forget to balance the plane laterally also, holding the spinner central bolt and a fingertip
under the rudder, and if needed add a small weight to the light wing tip.
Engine Thrustline:
Down-thrust should initially be set at 0.5 - 1.0°
degrees and right thrust 2 degrees, depending
on the power system and propeller used. Of
course, final settings can be fine-tuned to your
liking after the first few flights, and will ulti-
mately depend on your motor/propeller set up.
Control Throws:
All measurements are at the root/trailing edge
position. All controls should be set with a dual
rate switch, and we highly recommend that
you make your first trimming flights using all of
the low-rate settings listed below.
Setting Up Your Aircraft
30
techsupport@composite-arf.com
C of G range:
from Trailing Edge at Wing Tip.
CENTRE of GRAVITY
2° Right-thrust,
depending on propeller
0.5 - 1 ° Down-thrust,
depending on prop
THRUSTLINE
150 - 160mm
Advertisement
