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Home✈️Aircraft🚁HelicopterThunder TigerOther › Raptor 50 clutch shoe
04-05-2010 01:36 AM  10 years ago
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sonny1526

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USA

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Raptor 50 clutch shoe
My raptor 50 clutch shoe is stretched about 1mm after 20 flights. This can't be right because I've heard of pilots fly their Raptor 50 dozens of flight before clutch replacement. I think the clutch shoe was weak to begin with. I may have to replace it soon with quickuk high strength clutch shoe, but they are little pricey.
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04-05-2010 01:41 AM  10 years ago
Zaneman007

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Texas - USA

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You may want to look at replacing your liner. Clutches wear and break due to excessive travel(gap between the clutch and liner). The space between the two should be about the width of a piece of paper or two.Old Guys Rule!
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04-05-2010 02:15 AM  10 years ago
sonny1526

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USA

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clutch shoe
I took my engine apart today and found that the clutch liner was somewhat worn but not enough to warrant replacemnt. I also checked for the first time the strength and found them to be weak.
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04-05-2010 02:36 AM  10 years ago
alfred

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Australia, New South Wales, Mid North Coast

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The clutch in Raptors "was" a problem a long time ago...not any more.
The problem wasn't stretch but breakage.
You shouldn't get just dozens but more like a hundred flights out of it.
If the liner is worn to the point that the shoes have gone past the point of being able to come back to their original position, then the liner and now also the clutch requires replacement.
You need to find the cause of the abnormal wear. Maybe the clutch was dragging when it should have been disengaged? The usual cause is the clutch not being aligned on the engine properly.
Yes, the QuickUK is an excellent HD clutch, but I have found so far it's not required at least on my TT50SE.
It was required on my older TT30 V1.
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04-05-2010 02:49 AM  10 years ago
Zaneman007

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Texas - USA

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If your clutch is stretched out 1mm and your liner is worn. I would say that if you put in a new clutch it may wear prematurely, because...

With a new clutch the gap(distance between clutch and liner) is going to be way to big. The gap shouldn't be more than a piece of paper or two, and if it is already 1mm out and you obviously still have a gap?

Clutch liners are cheap and easy to replace.
Old Guys Rule!
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04-05-2010 02:53 AM  10 years ago
Zaneman007

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Texas - USA

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And what alfred said.

I've been flying Raptors going on four years. I can not remember the last time I replaced a clutch on my raptors,
Old Guys Rule!
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04-05-2010 03:59 AM  10 years ago
jschenck

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La Vista, NE.

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clutch gap should be about .008" (or .2mm). Measure the clutch at the solid part and the clutch bell liner. If the difference is significantly more then you need to reline and get the gap down or you'll likely run into clutch problems. Here's an example I did this winter.

Bell is at 42.2mm

clutch is at 41.6mm - I had several and they all measure to 41.6mm

First build I didn't check it and ran it like that, clutch lasted 1 gallon. Relined to 41.8mm and it's been fine since.

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