NTSB Factual Report

Prior to takeoff, the pilot was warned by tower controllers to use caution for wake turbulence from a preceding large business jet . During takeoff roll, prior to the tailwheel becoming airborne, the airplane ground-looped to the left and came to rest beside the runway. The pilot stated that the winds were calm and that he did not wait a sufficient amount of time behind the preceding airplane before starting his takeoff. Examination of the airplane revealed a bent right wing spar, bent right horizontal stabilizer and elevator.

NTSB Probable Cause

The pilot's failure to maintain adequate separation behind a preceding large business jet, which resulted in an encounter with wake turbulence.