Checking the CG Balance Point Don’t fly your RC model without knowing

Checking the CG Balance Point  Don’t fly your RC model without knowing

After checking your engine performance and the radio operation, always make sure that your model is properly balanced before your first flight. It happens all too often: Someone with a brand new airplane shows up at the flying field and has everything working perfectly. The radio checks out, all the controls move in the correct directions; the engine runs reliably and provides plenty of power. The pilot taxis it out and runs down the field and becomes airborne. Right away, it starts to rock its wings; the nose points up sharply; and after several frightening seconds, it hits the ground—hard! The pilot did everything right except he forgot to check his model’s balance.

BalancerWhether it is a trainer or an unlimited aerobatic plane, to successfully test-fly a new model, you must be absolutely certain that it is balanced at the correct center of gravity (CG) location. Nothing can spoil your day more than trying to deal with a tail-heavy model after it has left the ground. It is a fair bet that improper CG location is responsible for more broken airplanes than engine and radio issues combined. Let’s look at some methods for determining the CG.

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