Narrative:

Engine quit when throttle was at idle on final. XXX engine with wooden propeller and no electric system or ring gear. No cause found for engine failure. Because of wooden propeller and no ring gear, engine has very little flywheel effect; therefore, if even 1 cylinder missed for any reason, engine will stop. This stoppage did not result in an accident. A possible solution would be to use a higher idle speed or heavier propeller.

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Original NASA ASRS Text

Title: ENGINE QUIT ON FINAL. CONTINUED TO SAFE LNDG.

Narrative: ENG QUIT WHEN THROTTLE WAS AT IDLE ON FINAL. XXX ENG WITH WOODEN PROP AND NO ELECTRIC SYS OR RING GEAR. NO CAUSE FOUND FOR ENG FAILURE. BECAUSE OF WOODEN PROP AND NO RING GEAR, ENG HAS VERY LITTLE FLYWHEEL EFFECT; THEREFORE, IF EVEN 1 CYLINDER MISSED FOR ANY REASON, ENG WILL STOP. THIS STOPPAGE DID NOT RESULT IN AN ACCIDENT. A POSSIBLE SOLUTION WOULD BE TO USE A HIGHER IDLE SPD OR HEAVIER PROP.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.