NTSB Identification: WPR12FA010
14 CFR Part 91: General Aviation
Accident occurred Thursday, October 13, 2011 in Cle Elum, WA
Probable Cause Approval Date: 07/23/2013
Aircraft: DG FLUGZEUGBAU GMBH DG 1000S, registration: N7760A
Injuries: 1 Fatal.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
Witnesses reported that the glider became airborne within the first one-third of the runway during an automobile ground launch. The glider then pitched to a steep nose-high attitude and ascended through about 100 to 125 feet when the rope broke. The glider continued to ascend and momentarily leveled off near the end of the runway. The glider then entered a steep right bank angle turn and descended, turning about 300 degrees from its initial departure heading before it impacted terrain.
Postaccident examination of the glider revealed no evidence of a malfunction or failure that would have precluded normal operation. The glider’s right turn and associated steep bank angle likely resulted in a significant loss of airspeed and subsequent aerodynamic stall at a low altitude, with insufficient altitude for the pilot to recover. It is also likely that the tow rope reached its maximum tensile load and broke as a result of the rapid pitch-up maneuver after takeoff. The reason for the rapid pitch up maneuver could not be determined.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: The pilot’s failure to maintain airspeed and control after takeoff, which resulted in an aerodynamic stall. Full narrative available
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