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08-31-2009 10:43 PM  8 years agoPost 1
Jakub

rrApprentice

Poland

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Hello,

So I've been having this problem just recently with my OS50, I can't seem to get it to run properly (I'm using 20% Rapicon fuel)It seems to run rough when the temperature is around 95C(203F)and when the engine is around 120c(248) then it seems to run smoothly Do you guys maybe have any idea why this is so?
It started doing this not too long ago and I didn't change any of the needles.
At first I thought the sound was coming from the heli itself, but after leaning the engine out it went away It sounds like it's vibrating and humming in intervals.
I hope this makes sense.

Thanks,

Nothing holds better than a cross threaded bolt.

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08-31-2009 11:04 PM  8 years agoPost 2
leadlag

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Worthing UK

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Check the bearings. Sounds like they are on the way out.

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08-31-2009 11:23 PM  8 years agoPost 3
vavavoom

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London, England

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Yep bearings +1.

## Inteligence is knowing a tomato is a fruit...Common sense is not putting it in a fruit salad

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09-01-2009 07:43 AM  8 years agoPost 4
Jakub

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Poland

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Do you mean the bearings in the engine? The engine only has 3 gallons through it so far so does the Heli.

Regards,

Nothing holds better than a cross threaded bolt.

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09-01-2009 03:03 PM  8 years agoPost 5
leadlag

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Worthing UK

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Yes I am afraid so.They can go that quick.

Does it sounds like it rattles or like a washing machine?

Drop the engine and remove the fan.Look for play and rotate the crank.It should be smooth with no play. Take the backplate of and look for signs of corrosion.

I am afraid it is the bug bear of the Hyper.

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09-01-2009 04:35 PM  8 years agoPost 6
Jakub

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Poland

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If that's the case why would it run smooth when It's lean and start this weird noise when it's a bit on the rich side

Thanks,

Nothing holds better than a cross threaded bolt.

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09-01-2009 05:31 PM  8 years agoPost 7
SC Raptorman

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South Carolina

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Bearings make allot of noise idling if that's the problem and that sounds like the bearing regardless of the little bit of fuel it has burned , I have seen one lean run knock the bearings out .

Oh what a feeling 3D Flying can be
Magnum Fuels

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09-01-2009 08:11 PM  8 years agoPost 8
Jakub

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Poland

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I must say that the engine idles great, no problems there. Everything sounds good until it goes into hover

Nothing holds better than a cross threaded bolt.

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09-01-2009 08:46 PM  8 years agoPost 9
bigwolf1

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USA

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If your in question, Take it out and tear it down for inspection as to avoid anymore damage to it. Rear bearings can easly be inspected for damage without taking them out of case.

MAH blade Rep
Trex700LE
Magnum fuels

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09-01-2009 11:02 PM  8 years agoPost 10
Jakub

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Poland

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Will do thx

Nothing holds better than a cross threaded bolt.

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09-01-2009 11:56 PM  8 years agoPost 11
BarracudaHockey

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Jacksonville FL

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When the motor starts acting up without you having changed anything there's a few places to look. Bearings maybe but the easy and quick things to change are the fuel lines, especially the clunk line, and the plug before you start tearing into anything.

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

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09-02-2009 04:41 PM  8 years agoPost 12
leadlag

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Worthing UK

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If its humming or vibrating ie making strange noises then it won't be plugs or fuel lines. Those will just make it run lean/rich or cause it to cut.

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09-17-2009 09:37 PM  8 years agoPost 13
Jakub

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Poland

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It took a while but finally I have a sound clip ready, http://jrpropo.pl/video/VIBE50TEST.wma
please let me know what you might think may be the problem. The engine is running around 98 to 103`C

any input will be appreciated.

Regards,

Jakub

Nothing holds better than a cross threaded bolt.

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09-18-2009 07:14 AM  8 years agoPost 14
bigwolf1

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USA

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I here it but if it's a bearing will need to here it at idle.

MAH blade Rep
Trex700LE
Magnum fuels

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09-18-2009 07:18 AM  8 years agoPost 15
Jakub

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Poland

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It sounds perfect at idle. It even sounds okay in normal mode, it starts to act up in idle up

Nothing holds better than a cross threaded bolt.

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09-18-2009 07:20 AM  8 years agoPost 16
bigwolf1

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USA

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have you ck'd the carb or cleaned it. Might have a piece a trash in it some where. or you fuel tubing is soft and the engine is sucking it in and closing it off breifly.

MAH blade Rep
Trex700LE
Magnum fuels

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09-18-2009 07:43 AM  8 years agoPost 17
Jakub

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Poland

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I have checked the carb when I pulled out the Engine... but I didn't check the fuel lines nor the clunk. I will check that out today because to tell you the truth I've started to have this problem after I replaced all the fuel lines and clunks.

Thanks I will let you know later today.

Regards,

Nothing holds better than a cross threaded bolt.

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09-18-2009 01:11 PM  8 years agoPost 18
Swoop

rrElite Veteran

Newark, DE USA

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Sounds lean to me. I would definitely suspect the pressure line or clunks since that was the last change you made.

Chris
X50, B320, Radix, Spartan
Titan,Kasama,MP5,Radix,JR770
Trex450SE,MavrikkG5,Phoenix35

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09-18-2009 06:28 PM  8 years agoPost 19
Jakub

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Poland

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Okay, so I changed all the fuel lines and clunks and still no difference
I'm not sure what to do now.

Nothing holds better than a cross threaded bolt.

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09-19-2009 03:45 AM  8 years agoPost 20
Swoop

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Newark, DE USA

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Did you make sure your exhaust pressure line is not leaking? The get brittle at the muffler. If you lose exhaust pressure, you lose fuel pressure, then it leans out.

Chris
X50, B320, Radix, Spartan
Titan,Kasama,MP5,Radix,JR770
Trex450SE,MavrikkG5,Phoenix35

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