First fuel plane, A Thunder Tiger 40 Trainer , had it a week been running in the engine every evening, Go to the local field, find someone to help me, Plane takes off with the assistance of the instructer, lands, refuel it take off,slight left bank climbing, goes into a LARGE circular climb, Tx does not control plane, instructor goes running across the field holding the Tx trying to recover it. Plane climbes almost out of sight then heads south, never to be seen again. NO WHERE IN THE INSTRUCTIONS DID IT SAYTO CHARGE THE BATTERY! Is that considered a crash?