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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
>> Homepage: http://www.flyrotary.com/
>> Archive: http://lancaironline.net/lists/flyrotary/List.html
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