Event Description
The pilot/owner of the airplane initiated a soft-field takeoff from a turf runway after a preflight inspection and before-takeoff checks revealed no anomalies. During the takeoff roll at an airspeed of 50 knots, the airplane became airborne after traveling over a "deep dip," then settled back onto the runway. Subsequently, the airplane "swerved" to the left, and the pilot attempted to correct with aileron and rudder inputs. The airplane departed the left side of the runway and came to rest about 300 feet beyond the runway's edge.
Damage
Examination of the wreckage revealed substantial damage to the left wing, empennage, and tailcone. Ground scars and damage to the tailcone were consistent with dragging of the tail section on the runway.
Pilot Report
The pilot reported that there were no mechanical deficiencies with the airplane that would have precluded normal operation.
Relevant Guidance
According to Federal Aviation Administration Publication FAA-H-8083-25A, Pilot’s Handbook of Aeronautical Knowledge: "The effect of torque increases in direct proportion to engine power, airspeed, and airplane attitude. If the power setting is high, the airspeed slow, and the angle of attack high, the effect of torque is greater. During takeoffs and climbs, when the effect of torque is most pronounced, the pilot must apply sufficient right rudder pressure to counteract the left-turning tendency and maintain a straight takeoff path."