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HomeAircraftHelicopterHelicopter Main Discussion › how do you keep your pipe on your heli??
04-04-2009 09:34 PM  9 years agoPost 1
Wingman77

rrProfessor

Pulaski Tennessee

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my last failure is when I cleaned everything real nice put the bolts through the engine and pipe with a gasket. then torqued a nut on each bolt using red loctite and then put another nut on each bolt using red loctite. I let it sit for 18 hours then test flew and the pipe was loose in less than a minute. enging was running great till then and maybe a bit on the rich side.

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04-04-2009 09:36 PM  9 years agoPost 2
Dood

rrProfessor

Wescanson

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You need to get the pipe and engine up to operating temp THEN tighten the bolts again at the field.

Split lock washers are about all you need to make sure it stays tight. No need for loctite.

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04-04-2009 09:37 PM  9 years agoPost 3
Wingman77

rrProfessor

Pulaski Tennessee

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ok, maybe I can do it without burning myself, should I use regular nuts or nylock nuts?

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04-04-2009 09:39 PM  9 years agoPost 4
Dood

rrProfessor

Wescanson

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Nylock nuts won't vibrate loose like regular nuts.

Also, you need to view nylock nuts as being disposable. Once you've used them (installed & removed), they should be discarded & replaced.

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04-04-2009 09:46 PM  9 years agoPost 5
Wingman77

rrProfessor

Pulaski Tennessee

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ok I have pleanty of them, shoul I try to reuse the gasket or should I just go metal to metal?

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04-04-2009 09:47 PM  9 years agoPost 6
Dood

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Wescanson

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i go metal to metal.

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04-04-2009 09:48 PM  9 years agoPost 7
Saint728

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Honolulu, Hawaii

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I go metal to metal if both sides are perfectly flat.

Take Care,
Cheers, Patrick

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

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04-04-2009 09:55 PM  9 years agoPost 8
dkshema

rrMaster

Cedar Rapids, IA

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NO loctite, the temperatures defeat its purpose.

Lose the gasket and don't bother with RTV, Epoxy, or other sealer. Metal to metal.

Tighten the bolts. Fly, land. While the motor and muffler are still hot, tighten down the bolts, using a good wrench that fits the socket in the cap screw well.

After the next couple flights, tighten again, while things are hot.

The bolts should stay put till you need to remove them after this.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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04-04-2009 10:09 PM  9 years agoPost 9
BarracudaHockey

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Jacksonville FL

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What DK said.

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

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04-04-2009 10:39 PM  9 years agoPost 10
Wingman77

rrProfessor

Pulaski Tennessee

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just curious...aluminum expands when it is heated, so why would you not want to tighten it when it is cold? what is the benefit of tightening when it is hot?

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04-04-2009 10:47 PM  9 years agoPost 11
rudyy

rrElite Veteran

E. Amherst, NY

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I use four regular nuts, two for each screw by tightening one after the other. No issue of loosening.

Rudy

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04-04-2009 10:47 PM  9 years agoPost 12
Dood

rrProfessor

Wescanson

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Don't doubt it, just do it.

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04-04-2009 10:57 PM  9 years agoPost 13
Wingman77

rrProfessor

Pulaski Tennessee

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I not doubting... I just don't understand.

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04-04-2009 11:25 PM  9 years agoPost 14
1WOLFS1

rrApprentice

, vt usa

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I use a THIN LAYER, of jb weld just were you would have a gasket. let dry and forget. when ready to remove, just take out bolt,hold rear of muff with one hand.now wack that hand with your other.comes right off. easy to clean for reuse. thanks for your time.

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04-04-2009 11:37 PM  9 years agoPost 15
dkshema

rrMaster

Cedar Rapids, IA

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what is the benefit of tightening when it is hot?
It WORKS.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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04-04-2009 11:50 PM  9 years agoPost 16
Wingman77

rrProfessor

Pulaski Tennessee

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It WORKS
lol, well that is what I just did, lets hope it holds.

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04-05-2009 12:31 AM  9 years agoPost 17
krashtagain

rrKey Veteran

ohio

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Nylock nuts are a waste in my opinion for pipes . The heat melts the plastic and they become simply a nut . Just my .02 Do as these guys are telling you to do . It works .

If you're not living on the edge you're just taking up space !

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04-05-2009 12:33 AM  9 years agoPost 18
Dood

rrProfessor

Wescanson

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Do as these guys are telling you to do . It works .
Except the JB Welding the pipe on part... That is possibly the stupidest thing I've ever heard.

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04-05-2009 12:38 AM  9 years agoPost 19
krashtagain

rrKey Veteran

ohio

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^^^^^^^^^^^^^^^

I have to agree !

If you're not living on the edge you're just taking up space !

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04-05-2009 01:15 AM  9 years agoPost 20
philthewrench

rrApprentice

Westchester Co. NY

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just curious...aluminum expands when it is heated, so why would you not want to tighten it when it is cold? what is the benefit of tightening when it is hot?
The bolts also expand. So your tightening the bolt at it's longest. The aluminium also become a bit more "compliant". You get a good squeeze while at the same time the surfaces of the nut and head of the bolt really seat into the aluminium as well.

Phil

... and now my impression of a lawn dart .......

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