20180705009129A

The flight was a practice flight operated under 14 CFR part 91 with water in the aircraft hopper. The pilot stated that he forgot to bring the aircraft out of "ground idle" and into "flight idle" following the engine run-up. The pilot stated that he did not recognize that the aircraft was not achieving the proper revolutions per minute (RPM) during takeoff roll. The pilot stated that after rotation, the aircraft did not accelerate enough to leave ground effect due to the ?ground idle? Setting and increased weight of the water load. The pilot stated that he should have jettisoned the load of water, switched the aircraft to ?flight idle,? And remained in ground effect in order to accelerate sufficiently. However, the pilot did not react in time before running out of available runway and stalling the aircraft at the departure end of the runway. The aircraft sustained substantial damage. The pilot, the sole occupant, was not injured. There was no post-crash fire.