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HomeAircraftHelicopterThunder TigerOther › R60 clutch
01-20-2003 04:52 AM  15 years agoPost 1
BigRob

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Long Beach, CA

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Just put my R60 together and finally got most everything setup. Although it sounds like the clutch is slipping.

The clutch I received in my KIT had the liner already glued on. Had anyone received a liner that had too much space between the liner and clutch? If so, does anyone know the correct spacing? 1-2mm all the way around?

I was planning on getting some thicker gasket material and having it turned down in a lathe.


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The BigRob

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01-20-2003 11:23 AM  15 years agoPost 2
Al Magaloff

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Rob, the already installed clutch liner is never correct. Way too much clearance as you have discovered. Do a search on "Raptor Clutch". Your proposed fix has proven to be a good solution.

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01-20-2003 03:47 PM  15 years agoPost 3
BigRob

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Long Beach, CA

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Cool
I figured as much.

Just took the calipers to it.

Clutch is 37mm Outer Diameter, while the clutch Inner Diameter is 38mm.


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The BigRob

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01-20-2003 04:38 PM  15 years agoPost 4
runboy

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I also just received a Raptor 60v2 and I had the following measurements on my clutch:'

Clutch Outer 37.05 mm
Clutch Inner 37.45 mm

I am not going to mess with mine. I read the recommended installation method is to wrap a piece of electrical tape around the inner part and stick it into the clutch shoe to get the correct spacing. I tried that on mine and found that it was almost a fit. I tried to ad a second layer and I couldn't get it in.
Had it failed the 2 layer test I would have replaced it. Sounds like you have more than twice the play as I do.

I guess my clutch clearance is even a little on the high side. I have seen 0.006IN on each side for a total of 0.012IN clearance recommended. This boils down to 0.305 mm so my clearance is 0.1mm too much

[url]http://www.avitop.com/[/url]

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01-21-2003 03:17 AM  15 years agoPost 5
heliray

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Elk Grove, Calif

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R60 clutch
Use a medium size screw driver and open the clutch slightly until it touches the liner, just a hair. Becarefull not to open the clutch too much other wise you might snap it. Make sure the clutch spins freely. It works well for me. You will diffently notice the clutch grabbing faster. Good luck..

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02-10-2003 01:34 AM  15 years agoPost 6
runboy

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heliray wrote:
R60 clutch
Use a medium size screw driver and open the clutch slightly until it touches the liner, just a hair. Becarefull not to open the clutch too much other wise you might snap it. Make sure the clutch spins freely. It works well for me. You will diffently notice the clutch grabbing faster. Good luck..
Aren't you "springing" your clutch by doing this ? I personally wouldn't use that method. I would think that this would weaken the clutch.

[url]http://www.avitop.com/[/url]

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02-10-2003 02:47 AM  15 years agoPost 7
MG

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California

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Rob,

I strongly recommend removing the old liner and wrap electrical tape around the clutch two times then place it into the clutch bell. After the glue dries pull the clutch out and remove the tape. If you attach the clutch to the fan before placing it in the bell it will make removing the clutch easier.

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02-10-2003 04:52 AM  15 years agoPost 8
BigRob

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Long Beach, CA

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Clutch liner
I guess I had a small cluth or over size bell. When I purchased new liner, I still had the same amount of clearance.I used tow layers of tape, but forget it, it had room for 4 layers!!

Oh well, I used two layers of clutch liner and the problem is solved. I had to turn the liner down for enough clearance though.


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The BigRob

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02-10-2003 05:53 AM  15 years agoPost 9
runboy

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I think a standard clutchbell without liner is 40 mm inner diameter and the standard clutch is 37 mm outer diameter. The standard liner is 1 mm, so that leaves 1 mm total clearence or 0.5 mm each side which is too much. So most people find they have to do as you did or find something to put in between.

[url]http://www.avitop.com/[/url]

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02-11-2003 01:22 AM  15 years agoPost 10
heliray

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Elk Grove, Calif

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Clutch
Too much waste of time removing the stock clutch liner, putting tape on etc etc. Try opening the clutch just a tad until you get a grab. It's worked for me. I have about 20 flights so far with now problems, but do what you gotta do.

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02-11-2003 01:44 AM  15 years agoPost 11
runboy

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I repeat:

Aren't you "springing" your clutch by doing this ? I personally wouldn't use that method. I would think that this would weaken the clutch.

[url]http://www.avitop.com/[/url]

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02-11-2003 02:25 AM  15 years agoPost 12
Notarheli

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Phoenix, AZ

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Just my own opinion, which means nothing without a quarter, but I would not suggest prying or otherwise opening up the clutch. As Runboydmc says, this springs the clutch and introduces additional stress at the pivot/hinge point. The best way is to "size" the bell to give a reasonable clearance. Reasonable is an objectionable number, but would be somewhere in the .008 inch per side range. The lower the better as long as the clutch does not grab. A grabby clutch only causes it to heat up more or engage too soon or both or...
Now, how to get the .008 (or whatever)> I like using a thicker liner and cutting it down on a lathe, like a miniature gasser liner. Other thicker liners are fine too. If you don't go that route, you can shim the bell, decreasing the bell I.D. How? Well, I've heard of lots of methods, but on my Concepts, I JB welded a .010 brass liner onto the factory brass liner that is in the bell, then JB welded in the liner. With all that goop wet, I installed a "tool" the same size as the stock clutch, but .016 larger O.D. Result.... a .008 per side clearance. Never had it come apart or otherwise fail again. Note, be careful or the squeezout will glue the tool in. I install the tool, remove it and clean out the squeezout, then install it again. I also have wrenching flats on it so I can "turn it" as I try to remove it, should it stick.

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02-11-2003 03:11 AM  15 years agoPost 13
runboy

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Dummy Clutch
If you really want every tool in the book you can even get a dummy clutch Which will be easy to remove:


http://www6.mailordercentral.com/he...aitem=1&mitem=1

[url]http://www.avitop.com/[/url]

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02-11-2003 03:29 AM  15 years agoPost 14
Notarheli

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Phoenix, AZ

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Yeah, what he said...a clutch,dummy
Actually, that's what I did for the Concepts. It was made by a friend to the same size, except O.D. Even uses the two bell bearings (they are ball bearings, so I guess they are bell ball bearings) to align it all. Don't own a R30, but I think there's a dummy clutch for it. Haven't seen one for the R60.

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02-11-2003 04:18 AM  15 years agoPost 15
runboy

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The link in my post was for a R60 Dummy

[url]http://www.avitop.com/[/url]

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02-11-2003 11:20 PM  15 years agoPost 16
Heliman1

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Hampshire UK

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R60 Clutch
Why do you all talk about using electrical tape, if you have a problem with the standard R60 metal clutch why not buy a clutch that is the correct size already to fit your clutch bell WELL ?????
buy a new R60 clutch from Quick UK and your problems are over

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02-11-2003 11:29 PM  15 years agoPost 17
runboy

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Doesn't say anything on Quicks site about the clutch being bigger than the TT. What are the dimensions of the Quick clutch ?

[url]http://www.avitop.com/[/url]

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02-11-2003 11:37 PM  15 years agoPost 18
Heliman1

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Hampshire UK

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Quick Metal clutch
I know there is no sizes on Quick uk web site , but they did not just copy thr TT unit they made it better , as in design and clearance on clutch bell just send them a e-mail or ring them for the dimensions you require

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02-11-2003 11:47 PM  15 years agoPost 19
runboy

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Well since you know they made it better you must have the tolerances right

Even with a perfect fit you would still need the electrical tape to when gluing in a new liner to make sure it is pressed out where it needs to be.

[url]http://www.avitop.com/[/url]

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02-12-2003 12:31 AM  15 years agoPost 20
Notarheli

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Phoenix, AZ

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runboydmc,
QuickUK clutch is 45.25mm (which as I recall is about .004 inch larger than the TT large clutch). Mines on the way but this is the size they quoted me.

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