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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › OS 50 hyper burning glow plugs
06-06-2009 04:59 AM  9 years agoPost 1
johnbs8

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roseville michigan

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my rappy just burned out a glow plug. i replaced it flew once and the second one burned out. whats going on here? i also have noticed that ive seemed to have lost a lil power. kinda bogs on barrel rolls...

also i use 30% fuel and my high needle is set to about 1.25 turns out. get good smoke...

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06-06-2009 06:33 AM  9 years agoPost 2
Raffy

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Chicago, Illinois

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The burnt filament of your first glow plug probably took out your second glow plug. You most likely leaned out when you lost your first glow plug.

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06-06-2009 08:26 AM  9 years agoPost 3
lightningrc

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UK

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richen it to 1.5 as the smoke is not always an indiction its rich.

plus it may be time for a rear bearing change and a ring if shes lost some power.

check all your fuel lines also as if there breaking down inside your tanks this will cause it to lean what ever your engine settings.

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06-06-2009 08:51 AM  9 years agoPost 4
nivlek

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Norfolk England

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The burnt filament of your first glow plug probably took out your second glow plug.
+1 on that .

I would fill the engine with fuel through the plug hole and spin it over with your starter to clear it out . Do that a couple of times and the debris should all be gone . Be sure to keep out of line with the spray of fuel coming out !

At the end of the day , it gets dark .

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06-06-2009 12:54 PM  9 years agoPost 5
BarracudaHockey

rrMaster

Jacksonville FL

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Could be a rear bearing going.

Could also be RTV if you used it to seal the muffler.

Examine the bad plug under a magnifying glass and you should get an indication of whats going on.

Andy
AMA 77227
http://www.jaxrc.com

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06-06-2009 02:03 PM  9 years agoPost 6
johnbs8

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roseville michigan

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the engine didnt seem to be running lean. i had another person look at it and the richness seemed to be fine. i looked at the first glow plug and it is slightly white but looks like all the filament is there. the second plug the filament is wasted, all curled up.fuel lines are all brand new as they were changed out no more than a month ago. i didnt use any rtv on the muffler. i did have to get a longer bolt for the muffler and mod it due to the muffler threads stripped out on it last week. thanks for any help, John

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06-06-2009 02:25 PM  9 years agoPost 7
airdodger

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Johnston USA

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If the engine is not hurt and the filiment is white you are lean, put a new plug in and open the needle some. What plug are you using?

Chris

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06-06-2009 04:09 PM  9 years agoPost 8
Zaneman007

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Texas - USA

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I agree that it could be lean. The cooling on a R50 is not the best. My high end is about 1.5 turns out on my R50.

A loose muffler will cause a loss of power, and over heat the engine, and burn the plug.

You want to tighten all of the bolts while the engine is hot. Hover, land, and tighten.

Just don't monkey it. This is not a strong man contest.

Old Guys Rule!

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06-06-2009 04:16 PM  9 years agoPost 9
RappyTappy

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Traveling the USA

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I have 5 gallons on one plug right now and I just pulled it out and it looks nearly like new. Any type of white ashiness, no matter how little, definitely indicates a lean condition. Also the drop in power sounds like its not getting enough fuel. 1.25 seems a little low to me. I run 15% at about 1.45ish turns and get great power.

So clean out the piston chamber as described above and go to 1.5 turns and see how she treats ya.

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06-06-2009 04:44 PM  9 years agoPost 10
johnbs8

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roseville michigan

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thanks all for the help. yah just might be running lean. im popping a new plug in and going to richen it up a bit more. going to go do that now and ill post back on my findings. thanks, John

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06-06-2009 10:29 PM  9 years agoPost 11
johnbs8

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roseville michigan

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well i just got back from flying. ran fine first 2 flights. i richend the motor a couple clicks checked the plug and all was good. on the third flight i noticed the header tank was half full and there was 1/4 in the main tank. clunk line was bent back in the tank. i had to shake it hard to pop it out. looks like im replacing that hopefully thats it.

will leaving fuel in the tank eat the clunk line? should the engine be run clean of fuel when done for the day or is leaving a lil fuel in the tank ok? Thanks john

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06-06-2009 10:38 PM  9 years agoPost 12
lightningrc

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UK

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It depends on the line used ,I bought some internal line the other day and it was rubish , what ever way you left the tank the line after a months would go really soft and mushy.

Ive now gone to using standard line in my mine and header tanks , some times it leaves a little in the main tank if im still chucking it around towards the end of the tank but im happy enough.

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06-07-2009 06:48 PM  9 years agoPost 13
johnbs8

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roseville michigan

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problem solved. clunk line gone bad. Thanks guys at RR John

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