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Date: Tue, 07 Sep 2004 02:51:37 -0700
From: Perry Mick <pjmick@mail.viclink.com>
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To: Fly Rotary <flyrotary@lancaironline.net>
Subject: [Fwd: safety wiring Ross prop bolts]
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> > paul wrote:
> > >
> > > 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.
> >
> > In theory if you have lock nuts you don't need safety wire.
> >
> > Paul Lamar


> The classic SAE 1 and 2 prop flanges for wood props have hat shaped
> threaded bushings pressed in from the back side. These bushings are also
> the drive lugs for the wood prop - you should not count on the bolts
> to drive a wood prop - metal is a different story. Vance

 
I'm forwarding this message because I think it's pertinent. Rusty said
he has the bushings on his prop extension on the prop end but just plain
bolts/locknuts on the redrive end. This would be ok because on the redrive
end it is metal-metal. 

Despite what Vance says, others say it is the clamping friction that drives
the prop, but I feel more comforable with the lugs.

Perry