Return-Path: Received: from sccrmhc11.comcast.net ([204.127.202.55] verified) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 393894 for flyrotary@lancaironline.net; Sun, 05 Sep 2004 09:57:27 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.202.55; envelope-from=kenpowell@comcast.net Received: from 204.127.205.146 ([204.127.205.146]) by comcast.net (sccrmhc11) with SMTP id <200409051356550110067dkue>; Sun, 5 Sep 2004 13:56:55 +0000 Received: from [68.51.44.162] by 204.127.205.146; Sun, 05 Sep 2004 13:56:55 +0000 From: kenpowell@comcast.net To: "Rotary motors in aircraft" Subject: Re: safety wiring Ross prop bolts Date: Sun, 05 Sep 2004 13:56:55 +0000 Message-Id: <090520041356.26568.413B1B270003C466000067C8220073474804040A99019F020A05@comcast.net> X-Mailer: AT&T Message Center Version 1 (Jul 16 2004) X-Authenticated-Sender: a2VucG93ZWxsQGNvbWNhc3QubmV0 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_26568_1094392615_0" --NextPart_Webmail_9m3u9jl4l_26568_1094392615_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Hi Ed, I came to aviation after racing motorcycles for many years. In the early mototrcycle days I had stuff falling off the bike (actually, just getting loose) until I discovered thread lockers (I was only a kid in those early years(grin)). Well, now that I have seen the light and discovered safety wire (I'm not sure its 'better' though) please educate me further - How is safety wiring the head of a bolt going to keep the nuts from falling off? Why not drill the aft end of the bolt (on the backside of the nut) for a small cotter pin? Thanks, Ken Powell -------------- Original message -------------- > Paul, if you have all metal type (NOT NYLON Inserts) lock-nuts for the > bolts and a crush plate with a recess that the heads of the bolts will seat > into preventing them from turning, then it is not necessary to safety > wire the bolts. That is the way I flew my Ross drive and my current RD-1C > drive. However, You must use all metal type lock-nuts! > > If you do want the safety wire then I suggest get the drilled head type > bolts. Drilling the shank can weaken the bolt especially if you have a bit > of torque to apply. > > FWIW > > Ed > > Ed Anderson > RV-6A N494BW Rotary Powered > Matthews, NC > ----- Original Message ----- > From: "paul" > To: "Rotary motors in aircraft" > Sent: Sunday, September 05, 2004 9:13 AM > Subject: [FlyRotary] safety wiring Ross prop bolts > > > > Hi all....On a typical aircraft prop installtion, the heads of the prop > > bolts are drilled and then safety wired. This works, because the prop > flange > > has fixed threaded sleeves into which the prop bolts fasten. On my Ross > > PSRU, there are thru-bolts, and instead of the bolts being threaded into a > > fixed unit, they go through the crush plate on the engine side of the prop > > and have locknuts instead. What might be the best method of securing > these > > type of prop bolts? Unfortunately, I have seen a few other rotary > > installations with a Ross redrive, but never bothered to look to see if > the > > prop bolts had safety wire, etc. Thanks for any and all suggestions. Paul > > Conner, 13b powered SQ2000 transporting to the airport today. > > > > > > > > >> Homepage: http://www.flyrotary.com/ > > >> Archive: http://lancaironline.net/lists/flyrotary/List.html > > > > > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html --NextPart_Webmail_9m3u9jl4l_26568_1094392615_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Hi Ed,

I came to aviation after racing motorcycles for many years. In the early mototrcycle days I had stuff falling off the bike (actually, just getting loose) until I discovered thread lockers (I was only a kid in those early years(grin)). Well, now that I have seen the light and discovered safety wire (I'm not sure its 'better' though) please educate me further - How is safety wiring the head of a bolt going to keep the nuts from falling off? Why not drill the aft end of the bolt (on the backside of the nut) for a small cotter pin?

Thanks, Ken Powell

-------------- Original message --------------

> Paul, if you have all metal type (NOT NYLON Inserts) lock-nuts for the
> bolts and a crush plate with a recess that the heads of the bolts will seat
> into preventing them from turning, then it is not necessary to safety
> wire the bolts. That is the way I flew my Ross drive and my current RD-1C
> drive. However, You must use all metal type lock-nuts!
>
> If you do want the safety wire then I suggest get the drilled head type
> bolts. Drilling the shank can weaken the bolt especially if you have a bit
> of torque to apply.
>
> FWIW
>
> Ed
>
> Ed Anderson
> RV-6A N494BW Rotary Powered
> Matthews, NC
> ----- Original Message -----
> From: "paul"
> To: "Rotary motors in aircraft"
> Sent: Sunday, September 05, 2004 9:13 AM
> Subject: [FlyRotary] safety wiring Ross prop bolts
>
>
> > Hi all....On a typical aircraft prop installtion, the heads of the prop
> > bolts are drilled and then safety wired. This works, because the prop
> flange
> > has fixed threaded sleeves into which the prop bolts fasten. On my Ross
> > PSRU, there are thru-bolts, and instead of the bolts being threaded into a
> > fixed unit, they go through the crush plate on the engine side of the prop
> > and have locknuts instead. What might be the best method of securing
> these
> > type of prop bolts? Unfortunately, I have seen a few other rotary
> > installations with a Ross redrive, but never bothered to look to see if
> the
> > prop bolts had safety wire, etc. Thanks for any and all suggestions. Paul
> > Conner, 13b powered SQ2000 transporting to the airport today.
> >
> >
> >
> > >> Homepage: http://www.flyrotary.com/
> > >> Archive: http://lancaironline.net/lists/flyrotary/List.html
> >
>
>
>
> >> Homepage: http://www.flyrotary.com/
> >> Archive: http://lancaironline.net/lists/flyrotary/List.html

--NextPart_Webmail_9m3u9jl4l_26568_1094392615_0--