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Old 07-16-2008, 11:15 PM
  #13  
Bob Mitchell
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Default RE: Alpha 40 Trainer


ORIGINAL: neilmot

Has anyone experienced a problem with the alpha 40's engine stalling when going from idel to full thorttle? We have a few new planes at our club with the same problem... The engines start instantly and even after a warmup with the glow batt the engine often stalls during the transition from idel to full. We have tried all the limited needle settings for LS and HS. If it were just 1 plane we would understand but it's at least 3 and 1 is a P51 PTS with the same .46 engine... We can get the planes flying but above half throttle. they sometimes stall on touch and goes... We have gone past the needle limits to get them to fly

Any ideas?

BTW the plane is a great trainer! Flys well. Very simple...

Neil
I'm flying an Alpha60 with the .61 and have had little problem with it. We did remove the factory "stops" to tune the engine, but it's run just fine, especially after replacing the 3 blade prop after several flights and the gaining of some confidence in my flying skills. The transition from idle to WOT has been just fine after adjusttment.

I did have a dead stick this evening, and after putting a tach on the prop it turns out it was running a bit lean. I adjusted it out and after that I did another 15 minute flight with no issues. I'd buy the same engine/plane combination again in a heartbeat.

I'm planning on a PulseXT 60 for my next plane, and will probably go with an OS engine on this one. Not because of problems, but just to get some experience with a different make of engine. Besides the OS 75 has the same mounting dimentions as does their 61.