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JR Heli Vibe - Airskipper - Sylphide - Venture > NEED HELP WITH MY VIBE 50 ............ Will explode ....
 
 
JJ-TREX450
Senior Heliman
Location: Saginaw, MI - USA

Alright guys after having 26 flights on my Vibe 50, I've started having serious problems with my helicopter . Now some one help me and resolve this problem. First of all here's detailed information regarding heli setup.
Everything is perfect, the muffler is not loose. The needle is set with carb smart, low end at 2 T and High end at 2 1/3 (what ever the max it can go from 2 T).
I’m using 15 % Nitro, 20 % Oil & rest Methanol. Now here’s the problem I’m having with my Vibe 50.
Today I went out to fly my vibe 50 to verify the problem, but unfortunately wasn’t able conclude the problem. At full tank the heli was flying sweet, but at half tank the tail started to vibrate, seems that rpm was increasing with a pintching noise and seemed the heli was going to explode. I even noticed lots of boiling bubble (Not exactly boiling just seemed like it) in the main tank, as well as the header tank (Just one big bubble) ( Does it makes a difference if their's a bubble in the header tank).. Later when I landed, I checked the engine, it wasn’t hot, no damages towards the engine.
What can cause this entire problem??

Need your helppppp
09-17-2008 04:25 PM
 
 
Wingman77
Elite Veteran
Location: Pulaski TN US

check your fuel line, I do know that a bubble in the header is NOT a good thing. you may need to get a better clunk in your main tank.
09-17-2008 04:28 PM
 
 
Zaneman007
Key Veteran
Location: Texas - USA

What brand of fuel are you using?

I'd rather be flying
09-17-2008 06:05 PM
 
 
hookmaker
Heliman
Location: Copenhagen, Denmark

What engine are you flying - this sounds like a pressure problem and that the engine leans out?? Do you use a header tank? Check fuel lines and fule tank(s) for congested plastic parts and/or loose plastic flaps at entrance of fuel line holes.
/Henrik
09-17-2008 06:40 PM
 
 
neonbjb
Heliman
Location: Goleta, CA - United States

Oh come on he answered half of those questions in the OP. Its nice you want to help but at least try.

If the RPM was increasing, it was probably getting leaner (possibly your carb smart doing that) but that doesnt really explain your vibrations; dont know what to think there.
09-17-2008 07:25 PM
 
 
JJ-TREX450
Senior Heliman
Location: Saginaw, MI - USA

Carb smart can max lean 2 turns from close out. It's something else as ive done 26 flights with this setup. Alright can Electronic setup cause such a problem, as I believe my Align 2 in 1 flickers. Maybe the switch is screwed up.
09-17-2008 07:46 PM
 
 
JJ-TREX450
Senior Heliman
Location: Saginaw, MI - USA

Can electronic setup cause such a problem after 26 flights.

Here's a post regarding my 2 in 1 problem. Both problems started together.
http://runryder.com/helicopter/t460578p1/?p=3730798#RR
09-17-2008 07:49 PM
 
 
aviation
Senior Heliman
Location: Quebec Canada

Problem

I would change all of your tubing outside and inside the tank and then take out your needles on the engine and blow them out with fuel or just air, and then replace them. This would be a good place to start.

aviation

09-17-2008 08:02 PM
 
 
hookmaker
Heliman
Location: Copenhagen, Denmark

Quote 
Neonbjb: Oh come on he answered half of those questions in the OP. Its nice you want to help but at least try......
Duhh???? Where does it say what engine it is, ...and if there´s a header tank?

Quote 
Neonbjb:If the RPM was increasing, it was probably getting leaner...

Well if you want to give the same diagnosis as already given once above, feel free...

Anyway, I still believe a thorough tank/tubing check is the best way to start.

Good luck man.
09-17-2008 08:20 PM
 
 
Eagle2bravo
Veteran
Location: Working or flying helis

Sounds like the clunk line has a split in it, about half way down the line.

T-rex 600n, Trex 450 se, Gaui 200, Trex 500, Blade cx, . "If ya plant corn, ya get corn."
09-17-2008 08:25 PM
 
 
steffgiguere
Key Veteran
Location: St-Eustache, Quebec, Canada

Well he did say he was using a header tank (he said it only had one big bubble). I have a similar problem with my YS90SR, if leaned but did not have bubbles, and a friend of mine fixed the problem, I only wished he had told me how.

I wish I could fly 24/7
09-17-2008 08:28 PM
HOMEPAGE  
 
 
Sun Nuclear
Senior Heliman
Location: Plymouth Minnesota

If I were you I would change the lines, make sure everything on the motor is tight and if that doesn't work then unhook the carbsmart and see what happens.

I doubt the 2in1 would cause your problem but I would ditch it and get a Scott Gray.
09-17-2008 09:06 PM
HOMEPAGE  
 
 
rexxigpilot
Senior Heliman
Location: florida

Just an educated guess, but you likely have a small air leak in the main tank. When the tank is full, the breach in the tank (probably at a seam ar stopper) may be sealed by fuel. Your tank may slightly leak fuel at this location or not. Just remember, fuel tight is not the same as air tight. When the fuel level drops, so will the tank's pressure if there is an air leak. The pressurized air from the muffler exhaust can't replace the leaking air quickly enough. Therefore, a pressure loss occurs. Your carbsmart can't adequately adjust for this change in pressure.
09-17-2008 11:33 PM
 
 
Ladymagic
Senior Heliman
Location: Kadena AB, Okinawa Japan

I would definately check your main tank for an air leak. Most likely, it's around the fuel nipple. Check that gasket and the pickup line as well. It usually gets pretty mushy around 26 flights. Another thing to check as well is your fuel filter. It may be clogged too and that will cause your engine to lean out as well. I burned up 2 hyper 50s becuase of it. You might as well check your header pick up line too. You can't be too detailed with this type of problem.

Mellisa
09-18-2008 02:20 AM
 
 
Parsifal
Veteran
Location: Singapore

Had a similar problem recently, turned out to be the check valve on the YS 50, it was intermitantly blocking.
09-18-2008 02:26 AM
HOMEPAGE  
 
 
JJ-TREX450
Senior Heliman
Location: Saginaw, MI - USA

Alright guys here what I’ve checked so far. I recently checked my fuel tank and fuel lines in and out, but wasn't able to find any sort of air leak. Everything seems to be in the right order. Infact this time I screwed up the second thread of my muffler while tightening. Therefore am using two nuts on muffler with long screws.
Other then this, as my align 2 in 1 unit led’s were flickering; I opened it and soldered the switch connection, as in permanently on position. Hope this resolves the align problem. Need to think how to make a switch for that now.

Still need to think how to fix my engine vibration problem. For people who wanted to know about my engine, I’m using OS 50 Hyper Engine.
09-18-2008 03:10 PM
 
 
Qrrambero
Veteran
Location: San Francisco / Bay Area

For the heck of it. If you can try another Muffler. Or make sure that the nipple in the muffler isn't leaking.

Ae
09-18-2008 03:24 PM
 
 
Ladymagic
Senior Heliman
Location: Kadena AB, Okinawa Japan

Ahh, one thing about the OS engine is the head bolts come loose if you don't check them reqularly, Check them for tightness using the criscross method. Also, check your glow plug. I had a similar problem with one of my 600Ns and it turned out to be as simple as a loose glow plug. Good to go now. It looks like once you check this stuff you should be goood to go too. Good luck!

Mellisa
09-19-2008 01:12 AM
 
 
bullseye1
Heliman
Location: Orange County, ca

Could be a loose prop nut on your clutch assy. if the engine reving high in mid flight without changing in head speed that will cause vibration, loss in head speed and it will sound like it's going to explode.
09-19-2008 01:23 AM
 
 
JJ-TREX450
Senior Heliman
Location: Saginaw, MI - USA

If the prop nut was loose, it wouldn't have rotated giving good compression.I think I concluded the problem though haven’t checked it yet. I took apart the engine, checked it thoroughly and nothing seemed to be loose on the head as well as the glow. Seems I wasted two days on checking everything, as I should have checked the Y.S Filer first.
I think that my Y.S filter has some problem, that on half tank (less pressure), their’s not enough fuel flow pressure. Maybe that little cloth is messed up. Will check that and update. Between someone tell me the correct direction on the Y.S Filer, if i'm wrong.

09-19-2008 09:21 PM
 
 
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JR Heli Vibe - Airskipper - Sylphide - Venture > NEED HELP WITH MY VIBE 50 ............ Will explode ....
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