Why Does My RC Plane Nose Dive on Launch?

Question: Why does my RC plane nose dive on launch?

Answer: A nose dive on launch usually indicates a trim or balance issue. First, check the centre of gravity (CG): it should be slightly forward of the wing’s thickest point, typically around 25-33% of the chord from the leading edge. If the CG is too far forward, the plane will pitch down aggressively. Adjust by moving the battery or adding small weights towards the tail. Next, ensure your elevator trim is set correctly; the elevator should be slightly up to counteract a nose-down tendency. Test the control surfaces for proper movement and no binding. Also, check your launch technique—launching too hard or angled downward can cause a dive. Finally, inspect the wing incidence angle; if it’s too low relative to the tailplane, the plane may dive. Make small adjustments and perform gentle test launches in an open area. These steps should help you achieve a smooth, level launch.