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From: Dale Rogers <dale.r@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Thread "sealing"
Date: Thu, 23 Jun 2005 8:15:09 -0400
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Dunno about the particulars, but if Tracy isn't using NPTF 
taps to thread the fitting holes, he might want to consider 
adding that to the specification.

Why?  Because the "F" on the end indicates that the thread 
form is designed to be self-sealing (gas-tight).  

The NPTF taps are only a little higher in price, and they 
save a lot of hassle downstream.

Dale R.
COZY MkIV #1254
 
> From: David Staten <Dastaten@earthlink.net>
> Date: 2005/06/23 Thu AM 07:52:48 EDT
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Thread "sealing"
> 
> Ok, I dont have my manual in front of me.. so maybe RTFM is the right 
> answer..
>  
> But I am close to putting on my oil fittings "for good" and have noticed 
> a few things...
>  
> On the RWS redrives, I do not know if the female threaded holes (1/4" 
> and 1/8") are tapered or not, but it appears that my AN fittings I have 
> to thread into the holes on the RWS are able to bottom out. What is the 
> appropriate method for ensuring a snug fit and preventing vibration or 
> pressure induced flexing/loosening. Likewise, sealing options for other 
> threaded ports (not the flared sides of the AN fittings, but the 
> pipethreaded end of the fitting).
>  
> Teflon?  Lock-Tite? Whats the answer? I have heard of anecdotal stories 
> of these products causing problems when bits and pieces of them break 
> off and lodge someplace.
> 
> Dave Staten
> 
> 
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