----- Original Message -----

From: Mark Steitle

To: Rotary motors in aircraft

Sent: Tuesday, September 07, 2004 11:20 AM

Subject: [FlyRotary] Re: Temperature limits on Locknuts

Ed,
I trust you will share Tracy's response with the group? 

Thanks,
Mark

At 11:07 AM 9/7/2004 -0400, you wrote:

Mark, I currently use  the ones provided by Tracy for the Redrive.  I intend to replace them with the metal type, but need to order that size.  Also, I want to check with Tracy and make certain there is no reason (that I have not considered ) against using them.
 
  Again, I admit that its  probably overkill and unnecessary.   On the other hand, I see no reason not to use metal locknuts as appears to be a common practice for FWF.
 
Ed
   
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC

----- Original Message -----

From: Mark Steitle

To: Rotary motors in aircraft

Sent: Tuesday, September 07, 2004 10:46 AM

Subject: [FlyRotary] Re: Temperature limits on Locknuts

Ed,

I recently became aware of the practice of using only metal locknuts on everything fwf.  So, I ordered a couple dozen of each size and replaced everything fwf on my installation except for the ones used on the psru bolts.  Did you change those to metal or use the nylon supplied with the redrive? 

Mark S.

Mark S.    At 10:43 PM 9/5/2004 -0400, you wrote:

Attached is what I found with a quick search for locknuts with plastic/nylon inserts.  The max temperature range is listed as 250F.  The metal ones go up to 1000F.  So perhaps metal is overkill - but 250F does not provide me with a comfort margin I would like under the cowl.

I agree that the prop bolt nuts should never see 250F, but, the question is what effect elevated temperatures short of 250F do to the life of the material. 

So it would appear that what ever makes you feel comfortable would be the way to go.  Me, for the prop and most things forward of the firewall, I'll continue to use the Metal Lock nuts. 

Ed

Ed Anderson

RV-6A N494BW Rotary Powered

Matthews, NC

 

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