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Thunder Tiger Raptors 30-90 - Imperio > RAPTOR 30 Out of power due clunk line failure - Too Close to Crash
 
 
spiacro
Heliman
Location: Athens, Greece

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Hi all,

today I went to make a flight with my helicopter (Raptor 30v2). I burned the first tank and everything went well. Noteworthy that recently I had changed clunk line, because I had problems with the engine tuning. When it was time for the second flight, I took off normaly and after 5 minutes, while I made hover at 5-6 meters height, the engine stopped. I landed as long as smoothly I could (I do not know to make autos) and while I wondered why the engine stopped, I observed that header tank was empty and the main tank was almost full. I understood that something didn't go well with clunk line. The reason that stopped the engine, appears in the first photo. I have put a piece of white tube into spoiled tube in order you can see the cut. With this clunk line I had burned only 5 tanks. I placed a new clunk line and I added an extra tube ring for safety as it appears in the second photograph. I consider that possibly it is better. Is it right or not? I am afraid that if this happens again, I 'll not be so lucky.. Does anybody know why the clunk line cutted this way? For what reason? Any suggestions?



Spiros

Raptor 30V2 TT39 Futaba 401 Futaba 9Z
10-24-2009 11:09 PM
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GREYEAGLE
Key Veteran
Location: Sioux City IA

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Looks like

Did you splice in a section of Neoprene instead of Silicone ? It's looks pretty dark. replace the whole section if possible.

If your sources are pretty limited on the island, you may need to check out like a aquarium fish shop and see what they have for tubing you may find silicone in a few different sources.

greyeagle
10-25-2009 01:47 AM
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jschenck
Elite Veteran
Location: La Vista, NE.

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Quote 
I placed a new clunk line and I added an extra tube ring for safety as it appears in the second photograph. I consider that possibly it is better. Is it right or not?


Yes! I do that with all my fuel tubing connections.

I agree, the replacement fuel line looks like maybe the wrong material. Look for silicone tubing, or better yet Hayes black clunk line.

http://www.readyheli.com/Hayes_clun..._p/hayq0249.htm

.. P-gas, T700, V50c/u, R50T, T4/250 and a Cricket ..
10-25-2009 03:47 AM
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spiacro
Heliman
Location: Athens, Greece

My Posts This: Topic  Forum
Quote 
Did you splice in a section of Neoprene instead of Silicone ? It's looks pretty dark. replace the whole section if possible

Quote 
I agree, the replacement fuel line looks like maybe the wrong material. Look for silicone tubing, or better yet Hayes black clunk line.

I bought it from a model shop and I asked for silicone. Simply I bought orange colour.

Thank you for your replies.

Spiros

Raptor 30V2 TT39 Futaba 401 Futaba 9Z
10-25-2009 08:33 PM
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Thunder Tiger Raptors 30-90 - Imperio > RAPTOR 30 Out of power due clunk line failure - Too Close to Crash
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