check that when you place your fingers on these marks, the plane balances with the nose down a bit. Its also helpful to plug in your design into an online Center of Gravity Calculator to find the correct balance point. Here is a good...
Purchasing plans also help to support the operation of the Academy of Model Aeronautics - the #1 advocate for model aviation throughout the world. If the AMA no longer has this plan on file, I will be glad to send you my higher resolution version. Try my Scale Calculator for Mod...
The aerodynamic center of the wing section is simply 0.25 times the MAC. The aerodynamic center must be found for both the wing and tail surfaces. The neutral point of the aircraft must be found next. It is used to determine the location of the center of gravity of the airplane, and is...