----- Original Message -----

To: Rotary motors in aircraft

Sent: Sunday, September 05, 2004 2:34 PM

Subject: [FlyRotary] Re: safety wiring Ross prop bolts

 

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 -----

To: Rotary motors in aircraft

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