Instruction manual

2
Safety precautions
Be aware that this model is a sophisticated working model that functions much like a real aircraft. Correct
assembly and operation are critical to the safety of both yourself and spectators.
Be sure to get experienced, knowledgeable help from an instructor with the construction and flight of your
model. Your local hobby shop has information on local clubs in your area.
Also you may contact the Academy of Model Aeronautics
5151 East Memorial Drive
Muncie, IN 47302-9252
PH 800-435-9262
FAX [phone]
www.modelaircraft.org
INTRO
The Merlin Hobbies Sunny-Craft Knife Loop Yak ARF is a high performance sport aircraft with very
stable flight characteristics allowing even intermediate pilots to enjoy flying it. It is not a beginner
airplane. We cannot recommend the Knife Loop Yak ARF as your first R/C airplane. This airplane does
not recover to straight and level flight on it’s own. If you are able to handle a good basic trainer and a
small low wing aircraft, the Knife Loop Yak ARF is an excellent choice to learn about sport flying.
Be sure to build the model straight and true. Use first class radio equipment and the correct size motor,
wheels, fuel tank, and other components.
Properly test the operation of the controls and inspect the model for structural damage on the ground before
every flight. Replace connectors, clevises, cables, horns, and any other parts that show signs of wear or
fatigue.
If any parts are broken, missing, or defective or if you have any questions during the building or flying of
this model, please call us at 1-[phone].
You may also email us at product [e-mail]
.
Motor selection
There are several motors that will work well in your Merlin Hobbies Knife Loop Yak ARF. We
recommend the 2815 Brushless Outrunner from E3 and the E3 25 Amp ESC. Using an 800mah-1650mah
3 cell lipo battery will result in good 3D characteristics.
Getting Ready
Select a build area and carefully look over the supplied kit.
Be sure you have:
Four channel or more radio.
Four micro servos.
“Y” harness for aileron servos, unless your radio is programmable for flaps.
One motor.
One Propeller, see the motor instructions for proper size and pitch.
Building Supplies and Tools
CA Thin
CA Medium