Balancing:
Balance your Yak 55 75mm behind the leading edge of the wing where the wing meets the
fuselage for your maiden flight. This is approximately on the forward edge of the carbon wing spar
tube. Move the flight battery to balance as necessary.
Our preferred CG for 3D aerobatic flight is 85-90mm.
Remember -
It is much more important to have a properly balanced airplane than to save one ounce
of total weight. The Yak carries additional weight very well because of its superior aerodynamic
design, and noseweight can always be removed again if desired. After you have flown several flights,
you can tune your CG to suit your personal flying preferences.
When you experiment with CG location, move the CG only small amounts, 1/8 inch or so, at a time. A
small change in CG can have a large effect on flight characteristics.
Control Throws (in degrees and inches) and Corresponding Exponential Control Throws
Elevator:
Low rate - 15 degrees - 1.25" deflection - 30% expo
High rate - 55 degrees - 4" deflection - 80% expo
Rudder:
max throw - just short of touching elevator - 80% expo
Ailerons:
Low rate - 17 degrees - 1.75" deflection - 30% expo
High rate - 30 degrees - 2.25" defection - 60% expo
Remember, JR and Spektrum radios use positive (+) exponential, Futaba and Hitec use negative (-).
The above throw measurements were taken at the aft edge of the ailerons and elevator, and from the
bottom aft edge of the rudder. Keep in mind that even the low throws mentioned here are relatively
aggressive, so be sure to also program the matching exponential listed to help soften the model’s feel
around center stick.
Test your power system in a safe manner on the ground before ever attempting to fly your aircraft.
Range check your radio system according to manufacturer’s instructions.
Make your first flight with the controls set on low rates. During the trimming phase, we recommend
landing with some throttle, and not attempting to “dead stick” the airplane. This may mean you need to
time your flights and keep them a bit shorter than usual.
After your first flights, check all control connections and motor and prop mounts for tightness.
Thank you for your purchasing the 3D Hobby Shop 60” Yak 55. We hope you enjoy it!
Be sure to look for new aircraft and products coming soon from 3D HOBBYSHOP.COM
© 2014 3D Hobby Shop
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