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Prop Hub Flange needed

Jackson

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Hi Guys, I have a C85-12F with a tapered crank shaft. The Prop Hub Cont. pt no #3745 has a Flange, Cont. Pt No #3991 that fits between the back of the prop and the front of the Hub flange. I am missing this flange and am having trouble locating one. If anyone has one laying around, I sure would like to purchase it.
Thanks, Jackson
(562) 5720830
 

Jackson

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John,
You are right about the F. I really only need the crush plate, but will bid on the hub and crush plate if nothing comes up before the close on the Auction.
Thanks for the information.
Jackson
 

longwinglover

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Jackson,

If you can wait a week or so, crush plates show up on e-bay or Barnstormers fairly often.

That entire hub set-up has 6+ days to go and will top $400 (I'd bet).

John Scott
 

Jackson

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John,
I think the best solution is to wait and check those sites. If anyone should see a crush plate for the C85-12 for sale or bid please let me know. I am not exactly sure what the purpose of the crush plate is, I have seen two other engines without the plate.
Jackson
 

JimC

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>The Prop Hub Cont. pt no #3745 has a Flange, Cont. Pt No #3991 that fits between the back of the prop and the front of the Hub flange.<

I rarely run a wood prop and taper shaft, so don&#039;t have a good visual memory for this (and, am too lazy to make a special trip out to the airport and look), but doesn&#039;t the crush plate go in FRONT of the prop, and not between the prop and front of the hub flange? And, if you&#039;re running a metal prop, isn&#039;t the crush plate unncecessary?
JimC
 

Jackson

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I have a metal prop, but recently inherited a very nice eligible wood prop that I would like to try. You are probably right on the position of the crush plate, I have never run a wood prop before. I am not sure how, but I believe the crush plate is to distribute the load on the Hub
Jackson
 

longwinglover

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Jackson,

The crush plate goes on the front of the prop. It has several functions - mainly to evenly distribute the tension of the bolts across the face of the prop and to keep the bolts from eating up the wood.

I believe JimC is correct in that the crush plate is un-necessary for a metal prop - but do use correct washers under the bolt heads.

John Scott
 

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