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 is usually caused by incorrect trim settings, improper centre of gravity (CG), or insufficient elevator control. First, check that your plane’s CG is in the recommended position, typically around 25-33% of the wing chord from the leading edge. If it’s too far forward, the plane will tend to pitch down. Next, verify your elevator trim is set near neutral before launch; if it’s trimmed nose-down, the plane will dive immediately. Also, ensure your transmitter and receiver are calibrated and the elevator control surfaces move correctly and respond smoothly. When launching, give the plane a firm, level toss and be ready to apply gentle elevator up input to counteract any tendency to dive. Finally, inspect for any damage or misalignment in the control surfaces or wings that could affect stability. Adjusting the CG slightly aft or increasing elevator trim upwards often resolves nose dive issues. Testing in calm conditions helps isolate problems and ensures safer flights.