Accident Overview
The pilot and owner of an experimental weight-shift airplane reported that he checked the winds and found them calm before departing for a flight around the traffic pattern. During the downwind and base legs, the airplane experienced updrafts and downdrafts, which the pilot stated prevented him from controlling the altitude using either control inputs or power adjustments.
Final Approach and Impact
On final approach, at approximately 400 feet above ground level, the pilot observed the airplane's nose pitch down at a 45-degree angle, followed by the impact with the ground. The wind speed recorded at the airport at the time of the accident was 3 knots.
Aircraft Condition
The pilot reported that there were no mechanical deficiencies with the airplane that would have precluded normal operation. No other information regarding the aircraft or environment was provided in the source.