Nitro Newbie Unknown Problem

[albertcwfj]

Hi,
Took my 600n to the field today, started great, but when I put the throttle into it, the blades did not turn. The engine ran smoothly, and rpms were up, but the clutch still not engaging. I cut the engine assuming that I had a bad clutch liner, and never tried it again. I pulled the engine out as soon as I got home and the clutch liner looks fine (even thickness, smooth, not cuts or scrapes, not clutch powder/shreddings, never hot started, 1 gallon since new). Its never been crashed. It flew fantastic last week, and has not been taken apart in 2 weeks. Do these engines (OS 50 hyper) ever start backwards? What should I check out? Should I just put it back and try again? I really need to fly it soon, please help!
Thanks,
J

[tcast305]

Hi,
Took my 600n to the field today, started great, but when I put the throttle into it, the blades did not turn. The engine ran smoothly, and rpms were up, but the clutch still not engaging. I cut the engine assuming that I had a bad clutch liner, and never tried it again. I pulled the engine out as soon as I got home and the clutch liner looks fine (even thickness, smooth, not cuts or scrapes, not clutch powder/shreddings, never hot started, 1 gallon since new). Its never been crashed. It flew fantastic last week, and has not been taken apart in 2 weeks. Do these engines (OS 50 hyper) ever start backwards? What should I check out? Should I just put it back and try again? I really need to fly it soon, please help!
Thanks,
J

I've had my OS run reversed on my 600n. It almost died while idling then it seem to keep running.. I gave it a little throttle and it reved up and I noticed the main gear going in reverse. So I turned it off and restarted it and all was fine. If you motor reverses itself then thats usually that your low end needle is too rich.

Thanks.

[albertcwfj]

Mine did almost die, at one point when I first gave it throttle. I may need to readjust the needles since the temp has dropped about 20F since I last flew.

[Mercuriell]

Mine did almost die, at one point when I first gave it throttle.

Can be a sign of the main needle being too rich and the idle mixture being too lean.

[stevehonn]

I've actually had a Hyper 50 cough in flight and start running backwards, it's a very strange feeling to have to auto a heli while the motors still seems to be running well!

I'd agree that this is most likely your problem, the hyper engine does seem to be a little bit finicky at times until its up to temperature, this sort of behaviour is more common when the engine is still running very rich and during cold weather.

[BarracudaHockey]

Yep, running backwards.

Usually happens when the low speed needle is too rich.

[jet22b]

My engine also ran backward untill I adjust the needle's. Once the needles are set the engine will run just fine. Over 32 flight and engine running fine!!

jet22b