Incident Overview
A pilot conducting practice touch-and-go landings reported that during the takeoff portion of the seventh such maneuver, the aircraft did not climb as expected. In response, the pilot elected to make a precautionary landing.
Landing and Runway Excursion
The aircraft touched down near the departure end of the runway. It then ran off the end of the runway, continued down an embankment, and came to rest on a frozen lake.
Post-Accident Inspection
A post-accident engine run-up was performed. The engine ran satisfactorily across all power ranges and was capable of producing full static RPM. Magneto checks were also satisfactory. No malfunctions were identified.
Conclusion
The investigation did not state a probable cause for the incident.