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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
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