Return-Path: Received: from [24.25.9.103] (HELO ms-smtp-04-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 394251 for flyrotary@lancaironline.net; Sun, 05 Sep 2004 15:35:08 -0400 Received-SPF: none receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from EDWARD (cpe-069-132-183-211.carolina.rr.com [69.132.183.211]) by ms-smtp-04-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i85JYXSH002879 for ; Sun, 5 Sep 2004 15:34:34 -0400 (EDT) Message-ID: <005e01c4937f$620941c0$2402a8c0@EDWARD> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: safety wiring Ross prop bolts Date: Sun, 5 Sep 2004 15:34:38 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005B_01C4935D.DAC0DA50" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_005B_01C4935D.DAC0DA50 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Well, Ken it depends on which way Paul sticks the bolts through. If he = has a crush plate with slots either the nuts or the bolt heads can be = captured there, so if you are using the crush plate slots to capture the = nuts then you might want to safety wire the heads of the bolts sticking = out the other side of the prop flange. If you put the head of the bolts = in the slots then you are correct makes no sense to safety wire the = heads and leave the nuts unsafed. Like I mentioned I use the all metal lock nuts for over 225 hours and = never had one even loose. I just don't like hole through the shank, I have twisted all the ends of = bolts so weakened - just my personal hang-up of course. Ed Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message -----=20 From: kenpowell@comcast.net=20 To: Rotary motors in aircraft=20 Sent: Sunday, September 05, 2004 9:56 AM Subject: [FlyRotary] Re: safety wiring Ross prop bolts 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 --------------=20 > Paul, if you have all metal type (NOT NYLON Inserts) lock-nuts for = the=20 > bolts and a crush plate with a recess that the heads of the bolts = will seat=20 > into preventing them from turning, then it is not necessary to = safety=20 > wire the bolts. That is the way I flew my Ross drive and my = current RD-1C=20 > drive. However, You must use all metal type lock-nuts!=20 >=20 > If you do want the safety wire then I suggest get the drilled head = type=20 > bolts. Drilling the shank can weaken the bolt especially if you = have a bit=20 > of torque to apply.=20 >=20 > FWIW=20 >=20 > Ed=20 >=20 > Ed Anderson=20 > RV-6A N494BW Rotary Powered=20 > Matthews, NC=20 > ----- Original Message -----=20 > From: "paul"=20 > To: "Rotary motors in aircraft"!=20 > Sent: Sunday, September 05, 2004 9:13 AM=20 > Subject: [FlyRotary] safety wiring Ross prop bolts=20 >=20 >=20 > > Hi all....On a typical aircraft prop installtion, the heads of = the prop=20 > > bolts are drilled and then safety wired. This works, because the = prop=20 > flange=20 > > has fixed threaded sleeves into which the prop bolts fasten. On = my Ross=20 > > PSRU, there are thru-bolts, and instead of the bolts being = threaded into a=20 > > fixed unit, they go through the crush plate on the engine side = of the prop=20 > > and have locknuts instead. What might be the best method of = securing=20 > these=20 > > type of prop bolts? Unfortunately, I have seen a few other = rotary=20 > > installations with a Ross redrive, but never bothered to look to = see if=20 > the=20 > > prop bolts had safety wire, etc. Thanks for any and all = suggestions. Paul=20 > > C! onner, 13b powered SQ2000 transporting to the airport today.=20 > >=20 > >=20 > >=20 > > >> Homepage: http://www.flyrotary.com/=20 > > >> Archive: http://lancaironline.net/lists/flyrotary/List.html=20 > >=20 >=20 >=20 >=20 > >> Homepage: http://www.flyrotary.com/=20 > >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_005B_01C4935D.DAC0DA50 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Well, Ken it depends on which way Paul = sticks the=20 bolts through.  If he has a crush plate with slots either the nuts = or the=20 bolt heads can be captured there, so if you are using the crush plate = slots to=20 capture the nuts then you might want to safety wire the heads of the = bolts=20 sticking out the other side of the prop flange.  If you put the = head of the=20 bolts in the slots then you are correct makes no sense to safety wire = the heads=20 and leave the nuts unsafed.
 
Like I mentioned I use the all metal = lock nuts for=20 over 225 hours and never had one even loose.
 
I just don't like hole through the = shank, I have=20 twisted all the ends of bolts so weakened  - just my personal = hang-up of=20 course.
 
 
Ed
 
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From:=20 kenpowell@comcast.net
Sent: Sunday, September 05, = 2004 9:56=20 AM
Subject: [FlyRotary] Re: safety = wiring=20 Ross prop bolts

Hi Ed,

I came to aviation after racing motorcycles for many years.  = In the=20 early mototrcycle days I had stuff falling off the bike (actually, = just=20 getting loose) until I discovered thread lockers (I was only a kid in = those=20 early years(grin)).  Well, now that I have seen the light and = discovered=20 safety wire (I'm not sure its 'better' though) please educate me = further - How=20 is safety wiring the head of a bolt going to keep the nuts from = falling=20 off?  Why not drill the aft end of the bolt (on the backside of = the=20 nut) for a small cotter pin?

Thanks,  Ken Powell

--------------=20 Original message --------------

> Paul, if you have all = metal=20 type (NOT NYLON Inserts) lock-nuts for the
> bolts and a = crush plate=20 with a recess that the heads of the bolts will seat
> into = preventing=20 them from turning, then it is not necessary to safety
> wire = the=20 bolts. That is the way I flew my Ross drive and my current RD-1C =
>=20 drive. However, You must use all metal type lock-nuts!
> =
> If=20 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=20 have a bit
> of torque to apply.
>
> FWIW =
>=20
> Ed
>
> Ed Anderson
> RV-6A N494BW = Rotary=20 Powered
> Matthews, NC
> ----- Original Message ----- =
>=20 From: "paul"
> To: "Rotary motors in=20 aircraft"!
> Sent: Sunday, = September 05,=20 2004 9:13 AM
> Subject: [FlyRotary] safety wiring Ross prop = bolts=20
>
>
> > Hi all....On a typical aircraft prop = installtion, the heads of the prop
> > bolts are drilled = and then=20 safety wired. This works, because the prop
> flange
> = > has=20 fixed threaded sleeves into which the prop bolts fasten. On my Ross =
>=20 > PSRU, there are thru-bolts, and instead of the bolts being = threaded=20 into a
> > fixed unit, they go through the crush plate on = the=20 engine side of the prop
> > and have locknuts instead. = What might=20 be the best method of securing
> these
> > type of = prop=20 bolts? Unfortunately, I have seen a few other rotary
> >=20 installations with a Ross redrive, but never bothered to look to see = if=20
> the
> > prop bolts had safety wire, etc. Thanks = for any=20 and all suggestions. Paul
> > C! onner, 13b powered SQ2000 = transporting to the airport today.
> >
> > =
> >=20
> > >> Homepage: http://www.flyrotary.com/
> = >=20 >> Archive: http://lancaironline.net/lists/flyrotary/List.html =
> >
>
>
>
> >> Homepage: = http://www.flyrotary.com/
> >> Archive:=20 http://lancaironline.net/lists/flyrotary/List.html=20
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