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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 -----
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 --------------
> 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
> > C! onner, 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
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