My dad is having an odd problem with a new Webra .32 heli enigne. It has about 2 hrs. total time including a proper break in on the test stand. It will run fine in the heli for about five minutes. Then it begins to lose power to the point that at full throttle it isn't even making enough power to hover. If I drop to half throttle it runs well enough to fly but isn't making full power. It is putting out plenty of smoke at any throttle setting, doesn't sound lean at all it just loses power. My first thought is bad bearings but it's a low time engine. It isn't fuel, we've tried 30% heli fuel from Morgans and regular 10% CP like we run in all the other flying machines, fixed wing or rotor. Same problem regardless.

Seems to me that if it were a mechanical problem or overheating it would show up in the first minute or so of the flight but it takes about 5 minutes. The servo operates the throttle correctly. Ideas anybody? Thanks.

Rick H.