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 means your plane's centre of gravity (CG) is too far forward or the elevator trim is set incorrectly. First, check the CG by balancing the plane at the recommended point, often around 25-33% of the wing chord from the leading edge. If it’s nose-heavy, shift batteries or add weight to the tail to move the CG back. Next, ensure your elevator trim is neutral before launch. If the trim is set to pitch down, the plane will dive immediately. Also, verify that your control surfaces move in the correct directions. During launch, throw the plane gently and slightly upwards to maintain airflow over the wings. If the problem persists, try adjusting the incidence angle of the wing or the stabiliser slightly to provide more lift at low speeds. Finally, check that the motor thrust line isn’t angled downward excessively, as this can push the nose down. Following these steps should help your plane launch smoothly without diving.