Accident Description
A pilot reported that during the takeoff roll in calm wind conditions, the airplane did not accelerate enough to lift off. The pilot added throttle and attempted to jettison the load, but the dump-stop mechanism prevented the load from being released. As the aircraft reached the end of the runway, it lifted off. Shortly after, the tailwheel struck a small ridge, causing the airplane to decelerate. The aircraft then cleared a ditch and began impacting young trees. With large trees directly ahead, the pilot reduced power and landed in a field of young trees.
Damage
The upper and lower wing panels sustained substantial damage.
Pilot Comments
The pilot stated that the accident could have been prevented if the dump-stop had been flipped over prior to takeoff, which would have allowed the load to be dumped faster. Additionally, the pilot noted that because the temperature had increased from earlier in the morning, he should have reduced his chemical load.
Environmental Conditions
The density altitude at the time of the accident was calculated to be about 2,042 feet mean sea level (msl). The elevation of the airstrip was approximately 90 feet msl.
Mechanical Status
The pilot reported no mechanical malfunctions or failures with the airplane that would have precluded normal operation.