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HelicopterEngines Plugs Mufflers Fuel › O.S. 50 Hyper Problem
03-18-2009 10:55 PM  8 years agoPost 1
Heliman4213

rrApprentice

Pittsford,N.Y.​United States

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I have 6 other hypers without an issue. This new one has almost two gallons through it. The needle valve is about one and a half turns. When I run it in my scale fuse and put my finger on the crankcase its cool. One or two clicks in and I take off and in about two minutes it leans out all by itself I mean really leans out. I land and check the crankcase and you cant even touch it. One or two clicks rich and its very cool. Low end is were it should be and I fly it around without a problem. Being rich the headspeed is around 1500 to 1600. Dont really want too take the engine out as this would take hours. Some people have said just fly it if it does not quit and run it rich but im not thrilled how much fuel it seems to be using. I can fly for about 8 to 10 minutes and it is a Raptor 50 Titan mechanics. It just seems that the needle on this engine is really sensitive. Again have many of these motors and never had a problem with the hyper in over 1000 flights combined. Any ideas would be helpfull!!
Thank You all who help!!!!!!!!!!!!

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03-18-2009 11:04 PM  8 years agoPost 2
Saint728

rrProfessor

Honolulu, Hawaii

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Maybe there is something clogging your needle valve? It might be some sort or residue or actual something in there that makes the valve hole smaller then usual? One or two clicks sin shouldn't make the motor that hot.

Is it possible to pull the carburetor off the scale helicopter and replace it with a carburetor from one of your other motors that you know works? That way you can tell for sure if its the carburetor or the actual motor that is not working.

Take Care,
Cheers, Patrick

Check the hotties in my Gallery
http://rc.runryder.com/helicopter/gallery/9019/?all=photo

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03-18-2009 11:49 PM  8 years agoPost 3
Andy from Sandy

rrElite Veteran

Bedfordshire, UK

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This maybe related. I have had 3 engines now that when starting them they seem to be really rich. It was a struggle to get the model to the flight line. The engines just didn't idle properly. Once warmed up after a short fly round on landing the engines didn't come back to the idle cleanly and now seemed lean on the bottom.

Taking one of these engines I started by changing the carb, which cured the problem. I found the mixture control valve had a strange wear pattern on it but also the throttle rotor was also faulty in some way. I ordered a new mixture control valve and throttle rotor and this fixed the fault.

So if you can do it try changing the carb out from one of your good engines.

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03-19-2009 12:28 AM  8 years agoPost 4
airdodger

rrElite Veteran

Johnston USA

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The heat is probably not dissipating as fast due to the fuse. A better fan or more area in the fuse for cooling air may help, otherwise just keep it rich and use the fuel to help cool the engine off.
One heat range cooler plug may help too.

Chris

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03-19-2009 01:57 AM  8 years agoPost 5
MAXHSHV

rrKey Veteran

,mn usa

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are your fan blades intack? On my ravens i had simular problem,they have cheap plastic fans that like to shed there blades, and of course once one goes it rattles around and takes out the rest.

Century heli rep. To much power is never enough.

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03-19-2009 02:02 AM  8 years agoPost 6
Heliman4213

rrApprentice

Pittsford,N.Y.​United States

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ok tonight I changed all the fuel tubing, removed the engine and the carborator. I sprayed everything with cleaner inside and out. There seemed to be a little dust over some of the mechanics. I may have had this to close to something I was dremling some time ago. Im going to take air and blow everything off tommrow as well as slightly open up the exit hole on the bottom of the fuse. Everybody says the stock cooling fan is ok. Is this true? Also what else do you guys think I should do?
Thanks

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03-19-2009 02:16 AM  8 years agoPost 7
Raptorchief

rrVeteran

Kalkaska, MI USA

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What fuselage?

What fuselage are you running this engine in, also what fuel? Chief

I'm not a pilot, I'm a crash facilitator!

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03-19-2009 02:32 AM  8 years agoPost 8
rccarguy

rrVeteran

Boston MA

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One of these may help http://www.heliproz.com/prodinfo.asp?number=804555

The stock fan is adequate for an engine that is partially exposed to air as it is in the stock airframe, enclose it in a fuse and you may need extra flow to compensate. Also, I had a similar problem when the Hyper in my R50 had a compression leak between the head and cylinder, new copper gasket and tighten up the bolts cured it.

XCell Spectra G
Radikal G20
Some obsolete nitro helis too...

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03-19-2009 02:51 AM  8 years agoPost 9
Heliman4213

rrApprentice

Pittsford,N.Y.​United States

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The fuse is the Thunder Tiger Eurocoptor AS355 and running cool power 15 percent Nitro!!!

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03-19-2009 03:06 AM  8 years agoPost 10
Raptorchief

rrVeteran

Kalkaska, MI USA

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Great

I have this same fuse, i was running my thunder tiger 50 in it, I have since changed to the E620 mechanics. As for your problem, make sure of a few things, leave the rear most windows out when you fly, this will allow enough air to move to help keep the engine cool, also make sure the cut out on the bottom of the fuse is clear under where the fan blows out, check your head bolts are tight and make sure the carb is seated all the way down. Running it rich will save the engine in the long run, hope you get it worked out, Chief

I'm not a pilot, I'm a crash facilitator!

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03-19-2009 01:14 PM  8 years agoPost 11
Heliman4213

rrApprentice

Pittsford,N.Y.​United States

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Thank you Raptorchief. I am today going to cut away more of the fuse. I checked all bolt and cleaned the carb. I also changed all fuel tubing diassembled and cleaned the carb. I guess there is not a problem runnig rich as long as it is reliable. Did you say leave out both rear windows? Is this what you did and was it fine? Let me know thanks.

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03-19-2009 09:29 PM  8 years agoPost 12
Raptorchief

rrVeteran

Kalkaska, MI USA

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Yes I left out both rear windows for better air flow, Chief

I'm not a pilot, I'm a crash facilitator!

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03-20-2009 12:48 AM  8 years agoPost 13
Heliman4213

rrApprentice

Pittsford,N.Y.​United States

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And your cooling was fine after that? I also made the exit hole under the engine a little bigger.

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03-20-2009 02:25 AM  8 years agoPost 14
Raptorchief

rrVeteran

Kalkaska, MI USA

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Cooling

I never had a problem with cooling, I think it was because I did those things from the begining. Now with the lectric it stays within the normal temps. Chief

I'm not a pilot, I'm a crash facilitator!

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03-21-2009 01:11 AM  8 years agoPost 15
Heliman4213

rrApprentice

Pittsford,N.Y.​United States

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Thanks Raptorchief,
I made the exit hole bigger and took out the other window as well as the other things I stated in my previous text. Thank you for your help as well as everybody else and as soon as thge weathe rgets better I will test it and let you know how it is going.

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