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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Cline Regulator on OS 37??
07-18-2006 10:06 PM  14 years ago
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george e.

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Medford, NJ-USA

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Cline Regulator on OS 37??
I'm totally frustrated with 2 OS 37's on two different Hawk Pros. Many abrupt flame-outs and inconsistent mixture settings, leaning and richening in flight. Before I sell the Hawks and get out of helis, would a Cline Regulator work on the OS 37's. I've used Clines on my pattern and 3D glow planes with great success.

Any thoughts before I give up

Thanks
George
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07-18-2006 11:23 PM  14 years ago
Al Austria

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Sacramento, CA - USA

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The OS 37 doesn't need a regulator. What needle settings, pipe, glow plug, and fuel are you running? Also, see if you can get some help from someone that knows how to tune heli engines.
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07-19-2006 01:52 AM  14 years ago
gkoutsis

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Athens Greece

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My money are on a cracked fuel/exhaust line. Or the clunk inside the tank.George
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07-19-2006 02:14 AM  14 years ago
vortechZ230

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U.S.A.

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Re Plumb the whole heli with some decent fuel line,(AeroTrend, Etc,) inside and out,your problems should be solved!.....
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07-19-2006 01:15 PM  14 years ago
george e.

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Medford, NJ-USA

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I swapped out all the lines (standard Great Planes), swapped plugs OS#8, new tubing inside the tanks, tried header tank. No RTV on the muffler. Tried new engine. Finall found a partailly plugged pressure tap on the muffler and swapped for the stock Hawk Pro muffler, ran great for a couple weeks now the symptoms are back. I fly with some experienced guys and they ran out of ideas too.

I'm running Omega and Morgans standard 15% airplane fuel.

I like the heli but it's just too frustrating to fly; crash kit almost every other time out since the motor never quits at a "good" time.
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07-19-2006 02:34 PM  14 years ago
TMoore

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Cookeville, TN

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Put some 30% in it. Neither of the fuels that you mentioned have enough oil in them.

TM
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07-19-2006 03:45 PM  14 years ago
BarracudaHockey

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Jacksonville FL

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Thats what I was thinking, or even Cool Power 20 percent heli would be better than either of those.Andy
AMA 77227
http://www.jaxrc.com
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07-19-2006 03:56 PM  14 years ago
ADRYAN

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Stouffville, Ontario, Canada

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I think the abrupt flame-outs are caused by overheating...

try to run the engine as rich as you can and increase your throttle curve... r u running a governor or do you have a tach to find out what headspeed you are running.

A

.
DYNAX/OS91 : 9303/S649pcm : GY601/9251 : CSMRL10/9253 : 7.4vLipo/Regulator : KO2123s(ai/el/pi)
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07-19-2006 05:34 PM  14 years ago
george e.

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Medford, NJ-USA

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Head speed is around 1900 according to an experienced freind's ear. The original flameout problem was the plugged pressure tap causing the engine to run lean at full throttle. That problem is fixed, the last flameout was at mid-stick and the chopper sounded very rich at mid-stick (fine at full throttle). I leaned the low end a little but I guess not enough. Can a too rich setting cause the abrupt flameout? I can comfortably touch the backplate after a fight so I guess I'm not too lean??

I was hoping the Cline would solve my rich/lean problems.

Do you have to adjust the mixture if the weather changes??

I'm getting really good at putting the Hawk back in one piece Only took two hours.
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07-19-2006 05:53 PM  14 years ago
PaulJC

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Hertfordshire UK

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Do you have to adjust the mixture if the weather changes??
Yes, i also agree with the fuel change, a higer oil and nitro content would make the engine much happier
Re-entering the atmosphere...
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07-19-2006 10:44 PM  14 years ago
george e.

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Medford, NJ-USA

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I'll try some powermaster 20/20 tonight. I reset the needles to factory and I'll try retuning and se what happens. I'm getting more practice at building than flying
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07-19-2006 10:54 PM  14 years ago
TMoore

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Cookeville, TN

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Don't reset the needles to factory, start rich and sneak up on the right setting.

TM
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07-20-2006 12:42 AM  14 years ago
miker

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north port fl

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for what its worth, i use enya #3 cool power 15% heli fuel, in a shuttle, its got a lot of power holds its tune, never missed a beat from day one,
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07-20-2006 02:54 AM  14 years ago
Timmah0422

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Tulsa,OK

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I've had no problem with my OS 37. Rock solid with 30% heli fuel and a hatori SAB muffler.
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07-20-2006 01:53 PM  14 years ago
Daves

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Tallahassee, Florida

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George,

Assuming all else is well, I'd recommend a uni-flow fuel system. Sounds like your engine is going lean as you burn fuel -- probably at about 1/2 tank. The uni-flow system will cure that problem. I had to do it on my OS32 & 37.

It is easy to do and shouldn't take longer than 10 minutes to install if you can get to your tank easily.

If you aren't familiar with the uni-flow system, just do a search.
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07-20-2006 03:26 PM  14 years ago
BarracudaHockey

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Jacksonville FL

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Isn't that like killing a gnat with a 12 gauge?Andy
AMA 77227
http://www.jaxrc.com
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08-10-2006 10:19 PM  14 years ago
george e.

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Medford, NJ-USA

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Problem Solved !!!!
Last Saturday I finally figured out my problem, it was the fuel. I switched from Coolpower 15% to Powermaster 20/20 and the heli runs awesome. Switched back to the 15% and problems again, so bad the heli almost won't fly. The fuel is not bad, the same jug works fine in my glow planes but not at all in the heli. I know plenty of people running 15% in their OS 37's so I don't know why the extra 5% nitro makes the difference for me, but it does. Flying again

Thanks for the advice, I would have never guessed it was the fuel!
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