With the latter scenario, an IC plane is best balanced with an empty fuel tank otherwise the plane will become tail heavy as the tank empties during the flight. flight battery pack in place or fuel tank empty. Gently lift the plane up so it is clear of any surface and let it rest freely on your fingertips.īy the way, your plane must be 'flight ready' when you balance it i.e. the specified distance back from the leading edge of the wing or nose of the plane) and a couple of inches out from the fuselage sides. Place the tips of your index or middle fingers under each wing, exactly on the CG point ( i.e. A CG point outside of that range is rare, but not impossible.Ī quick and easy method of balancing rc planes, if you don't have a special plane balancing tool, is this: The main spar, if there is one, often lies in this general area.Īgain, this position is only a generalisation and in reality a CG point can be found anywhere from, say, 25% to 50% of the wing chord back from the leading edge. As a very general rule of thumb the CG will be about one-quarter to one-third of the wing chord (width) back from the leading edge of the wing. So, then, the first thing you need to do is identify the correct Centre of Gravity position according to the plan or manual. Tapered and delta wing shapes need to be treated differently, but it's (hopefully) unlikely that your first rc plane will have anything other than a parallel wing. High-wing planes are the easiest to balance and if it's your first plane then this is likely to be the case, since you should have bought a high wing trainer to learn on! (Learn about beginner rc planes.).Īlso, a high-wing trainer will more than likely have a parallel wing chord, which the following method applies to. This is especially true for tail-heavy planes.Īt worst, the plane will crash within seconds of getting airborne, ruining your day! Methods of Balancing RC Airplanes This is not unusual, and just means the CG can be moved forwards or backwards slightly without having an adverse affect on the plane's flight characteristics.īalancing a radio control plane correctly about its Centre of Gravity is so important because a very badly balanced plane will, at best, be hard to control.
Incidentally some rc airplane manufacturers specify a range that the Centre of Gravity can fall into, rather than a single point.
Typically it will be given in terms of distance back from either the leading edge of the wing or from the nose.
Rc airplane warbirds manual#
If you've built from a kit, the CG should be clearly marked on the plan but if you've bought an ARF or RTF plane then the instruction manual should give you the CG position. The CG point is determined during the design stage of the plane and is typically shown on a plan as a disc split in to four quadrants, as shown to the right. Technically this is called longitudinal balance.
Rc airplane warbirds how to#
Home Site search Site Map About Me Contact Me Site FAQ Privacy/Cookie Info Testimonialsīalancing RC Airplanes - How to Check Your Plane's CG.Ĭorrectly balancing your rc airplane is so important for safe flying, because an incorrect Centre of Gravity (CG or CoG) can potentially result in the plane being quite uncontrollable.Įvery rc airplane has a specific CG position, it's the mean point where all gravitational forces act upon the plane, and the point where the plane balances fore-aft correctly.
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