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HomeAircraftHelicopterMain Discussion › stumped by loose clutch
09-09-2013 01:44 AM  4 years agoPost 1
Travis MCH

rrApprentice

New Braunfels, Texas, USA

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So I sprung for the new Trex 600n DFC kit a few months back. It took me a long time to build it and get some test flights going. The clutch liner came pre-installed in the clutch bell. The fit was not all that tight so now when spooling up it take a long time for the clutch to grab hold and spin the blades. The clutch will actually unload in the air and cause the motor to speed up and slow down because the clutch is slipping.

I ordered a new liner from Align and it showed up this weekend. So today I pulled the motor out and removed the clutch bell from the frame so I could work on it. I quickly cut the old liner out with a razor blade and cleaned it up with some sand paper. I used a liberal amount of JB weld to glue in the new liner, hoping the extra thick JB would act as a shim to help close the gap.

After it was all said and done this new liner does not fit very tight on the clutch.

What gives? This is a new kit with only a hand full of test hovers and forward flight.

The clutch bell on my Outrage Velocity fits much tighter without so much as a sheet of paper for tolerance.

I don't see any adjustment on the clutch wheel itself to make it fit tigher on the bell, engage sooner on spool up and not slip.

Help me out guys, what am I missing here?

Thank you,

Stumped..........

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09-09-2013 02:01 AM  4 years agoPost 2
co_rotorhead

rrVeteran

Centennial, CO, USA

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No idea what's up with your clutch, but kudos to you. You're the first person I've seen on this forum that's used the word "loose" correctly. You've restored my hope that not everyone here is illiterate. Thank you.

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09-09-2013 02:46 AM  4 years agoPost 3
Dr.Ben

rrMaster

Richmond, VA, USA

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He probably also knows when to use there, their, and they're too, not to mention it's and its .

I would be suspicious that the ID of the bell itself is oversized due to a machining error. Get a new bell/liner assembly and see if the ID/OD disparity is where it should lie.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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09-09-2013 02:53 AM  4 years agoPost 4
altima1779

rrKey Veteran

Toledo, oh u.s

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I had the same issue with my 600le a few years back.

I replaced it with a clutch liner from my Evo 50 and never had the issue again.

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09-09-2013 03:05 AM  4 years agoPost 5
altima1779

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Toledo, oh u.s

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Says they have two left, mine were blue but should be the same.

http://www.ronlund.com/rcheli-prod/HIR_FR/400004.html

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09-09-2013 03:32 AM  4 years agoPost 6
ssrobzoom

rrKey Veteran

Tn

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Ive been flying the 600n for years and alway when needed put the raptor 50 clutch liners in as a replacement for the stock clutch liner and have never had a clutch failure with this method
http://www.ronlund.com/rcheli-prod/.../ACEPV0532.html

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09-09-2013 12:33 PM  4 years agoPost 7
Four Stroker

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Atlanta

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See jschenck post in: https://rc.runryder.com/t730518p2/

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09-09-2013 01:07 PM  4 years agoPost 8
Travis MCH

rrApprentice

New Braunfels, Texas, USA

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Thank you all for the great tips. I'll check the gap and order a Raptor clutch liner to see if that does the trick. I suppose this is common knowlede now that Align nitros needs clutch liners from different brands to work properly. Align are you listening?

I can tell you this, I'm much quicker at pulling the motor out now with all this practice. I would rather be flying it but I guess I knew what I was in for when I signed up to be a nitro guy.

Thanks again,

Travis

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09-11-2013 12:41 AM  4 years agoPost 9
Zaneman007

rrElite Veteran

Texas - USA

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IMO
This is a common issue with Align 600 clutches.

The key to replacing the liner is to test fit it first. If it is to loose, use a piece of paper cut to fit as a shim. Added another piece of paper if necessary.

When glueing it all together wrap the clutch shoe once with electrical tape to press the liner around the bell housing. It should be a snug fit.

Now clean it all up, remove the tape. Test it. The shoe should rotate freely. Put it together and fly.

Old Guys Rule!

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09-13-2013 01:30 AM  4 years agoPost 10
Travis MCH

rrApprentice

New Braunfels, Texas, USA

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So they say a dog is mans best friend. I think my new best friend is a dremel.

This Trex 600n clutch bell/liner tolerance has been a huge pain/learning curve for me but I think I have it licked.

The stock clutch liner was too thin causing too much gap between the liner and clutch shoe. This would require the motor to fully rev up before the clutch would engage.

I tried a new Align liner and had the same problem. I was recomended to use the clutch liner from a Raptor 50 so that's what I did. It was too tight......

I thought I had it sanded down enough so I put it all back together just to find out the clutch shoe was fully locked to the liner and would not freely spin.

So......everything back out of the heli once again. This time I went and bought a new dremel with some sanding wheels.
It took all of two minutes to neatly sand down the clutch liner to just the perfect gap so that it would still spin freely but grab/engage the shoe much sooner on spool up without huge revs.

I'm just itch'n to try it out this Saturday at the field.

Someone told me a while back that owning and flying a nitro is an art. I see where he's coming from now. There's so many little tricks of the trade that come with time, experiance and help from you guys on this forum.

Thanks again for the tips and help.

No longer stumped.

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09-13-2013 01:57 AM  4 years agoPost 11
McKrackin

rrProfessor

Lucasville,Ohio

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That's exactly how I fit mine.

I hold the clutch bell by the bearing blocks so it will spin freely.
Stick the sanding wheel in the clutch bell and let the Dremel spin the clutch bell.

Then I lay my finger on the pinion gear to slow it down.
That way the Dremel is turning faster than the clutch bell.

It sands the liner down very evenly all the way around.

I literally never use the word literally right.

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09-13-2013 07:35 AM  4 years agoPost 12
TMoore

rrMaster

Cookeville, TN

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I usually use oversize liner material and machine the liner for .007" per side clearance.

TM

Delayed Response Operator Not Engaged
AMA SECTION 336 = Good
Drones = EVIL

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09-13-2013 10:43 AM  4 years agoPost 13
Four Stroker

rrElite Veteran

Atlanta

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What Terry said ! Of course, everyone does not have a lathe. Even a toy lathe is good enough for this kind of thing. I consider 0.012" completely worn out and the Align is 0.025" new. It has always been that way ?

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