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HomeAircraftHelicopterThunder TigerOther › Having a problem with installing a Raptor 50 clutch on a Hyper 50
02-12-2006 09:57 PM  12 years agoPost 1
airmarshalg

rrApprentice

Mesa, AZ

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OS 50 Hyper:

The inside diam. of the clutch housing is too small for the crank by maybe a couple of thousandths. just trying to spin the clutch down to the front bearing is unacceptably difficult. Has anyone experienced this?


Thanks,

Greg

Airline Pilot: If it isn't Boeing, I'm not going

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02-12-2006 10:36 PM  12 years agoPost 2
montarok

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Brooklyn, NY

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I don't quite understand your question, but the clutch goes on the fan, not the crank.

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02-12-2006 10:51 PM  12 years agoPost 3
BarracudaHockey

rrMaster

Jacksonville FL

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http://www.raptortechnique.com

Use a crank lock as shown and 2 spare clutch bolts. Install the fan, then bolt the clutch to the fan.

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

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02-12-2006 11:23 PM  12 years agoPost 4
Peefor

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Norfolk UK

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Greg
It might be a burr on the crankshaft caused when they grind the (unused) keyway. If you look carefully you can sometimes see it. Correction is by means of a small oilstone at the appropriate point. I now do this as a matter of routine with a new engine.

Pete

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02-12-2006 11:25 PM  12 years agoPost 5
airmarshalg

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Mesa, AZ

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What I meant was the fan housing, not the clutch. I ended up getting it on: running it down and then off to clean shavings (yes, that's right, shavings from the fan housing. The fan housing was too small for the crank.

No, there weren't any burrs.

Greg

Airline Pilot: If it isn't Boeing, I'm not going

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02-12-2006 11:45 PM  12 years agoPost 6
Blademan7065

rrVeteran

Greenfield, Ma.

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I have had to do that on many R50's.

Fromeco Rep
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Check out my homepage

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02-13-2006 04:45 AM  12 years agoPost 7
dtm360

rrApprentice

HKG

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Yes..I've seen shavings on my crank keyway....As Peefor says...a quick debur does normally sorts things out. Makes you wonder how soft that alloy they are using really is....

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02-13-2006 10:08 AM  12 years agoPost 8
Peefor

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Norfolk UK

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Greg

The only way to get shavings off aluminium is with a very sharp cutting edge. A smooth round surface will not generate shavings, it may jam but it will not cut.

If the bore of the fan was too small, it would just jam on the crank. As you have shavings, there must be a cutting edge somewhere, even if it is too small to see.

Pete

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02-14-2006 12:51 AM  12 years agoPost 9
airmarshalg

rrApprentice

Mesa, AZ

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Yes,

The cutting "tool" was the edge of the key slot.

Greg

Airline Pilot: If it isn't Boeing, I'm not going

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02-14-2006 01:48 AM  12 years agoPost 10
Yug

rrMaster

UK. Herts

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Whittle it down with a bit of fine grit. Keep whittling till you get a runout of less than a thou.

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