NTSB Factual Report

While on downwind for landing, the experimental airplane, which had nearly a full load of fuel onboard, experienced a total loss of engine power. During his attempt to execute a forced landing in a nearby open hayfield, the pilot allowed the airplane's descent rate to become excessive. The excessive descent rate resulted in a hard landing, during which both wing and fuselage structure were bent and fractured. The reason for the loss of engine power could not be determined.

NTSB Probable Cause

The total loss of engine power for undetermined reasons, and the pilot's failure maintain the proper descent rate during the last part of his approach to a forced landing in an open hayfield.