infernorcteam

My Feedback: (4)

Hope you guys can help. I've tried everything to correct this problem. When I put my Raptor 30 inverted for more than 2-3 seconds the engine boggs down and my head speed drastically drops. I'm afraid if I kept it inverted, the engine would eventually stall. I've tried ajusting both the pitch and throttle curves with no success. At first I wondered if it was the engine. It's an O.S. 50 Hyper with the carb only opening to about 80%. But after thinking about it, that really cannot be becasue it flies great from 0-12 degrees positive!

I know, the next crash will be a 50 so that I can let that motor run!

BarracudaHockey

My Feedback: (11)

Check your needle setting, if you're running too rich upright its possible you're overly rich when it flips inverted and the fuel pressure changes.

infernorcteam

My Feedback: (4)

Thanks BarracudaHockey, I will check that.

tadawson

Why only 80%? If it bogs inverted, it would tend to indicate the need for more power. Also, have you verified your blade pitch to confirm that you have the same pitch range positive and negative, and that 0 occurs where you think it does? You may also be getting too high a pitch inverted, which will also cause you to bog . . . . Curves will only do so much, and if the mechanical setup is off, may not be able to fix this problem . . . .

- Tim

infernorcteam

My Feedback: (4)

80% because its I'm running an OS Hyper 50 with 550mm blades. The 50 running 100% turns too high of a head speed. I've varified the blade pitch to confirm the pitch range multiple times, 12 positive and 9 negative. I know the true fix to this problem is to ultimately run 600-620 blades which I plan to in the future. I bought this heli used but never flown with two extra 30 crash kits and no engine. I had an extra Hyper 50 and figured it would work fine. It works well right side up!

Bugzilla

I've never messed with nitro before so I gotta ask. If it's bogging with 550's on it, how would longer heavier blades solve the problem?

evan-RCU

He'd go to 100% throttle...


My suggestion is to make the leap to the 50 setup and them troubleshoot from there.

dooleyje

I would check on my fuel system. The bog could actually be a lean run in the inverted position as you stated it runs great upright. Your clunk could be out of the fuel when inverted or you may have a pin hole in the fuel line in the tank that uncovers when inverted. I would use a header tank ( make sure your header tank is level with your carb pickup/needle valve. Some fuel tanks are a little different mounted in helicopters such as when upright it is lower than the carb and inverted it is above.

Jim

infernorcteam

My Feedback: (4)

Hey Jim, it's funny you mentioned the header tank because I wondered that myself and actually purchased one a few weeks ago and just never got around to putting it on. I'm gonna have to put it on and play with the carb because both lean and rich conditions have been mentioned. I'll let you know what I find out.

Brandon