Re: REFLECTOR: Bounce from Nate Calvin

[jpr@ix.netcom.com]

I just took my drawing to a machine shop a few minutes ago, he'll have 4
made up by the end of next week for me.  Cost is $17.50 or so for
material and labor.  Of course, it should be less if they were made a
hundred or so at a time!  I believe Velocity is working on some kind of
permanent fix themselves, although I don't know if they think the
aileron bearings and rear control arm support bearing are fine as-is. 
They probably are, but I want something better myself.

The design I came up is made out of 1/4" 6061-T6, and will also retain
the inner race in case of failure there..  If anyone wants a picture,
send me an email...  but I'm not going to post any drawings until I
mount one up myself and know it works! (then I'll post a picture...)

-john r.


Brian K. Michalk wrote:
> 
> Forwarded message:
> >
> > I found my aileron brackets in the engine compartment to be assembled
> > identically as the bearings brackets in the keel.  Although, no axial loads
> > there, it would be a bit of a bummer to lose an aileron bearing in flight.
> > Guess I'll have to build a retainer for those two also.
> >
> > Nate Calvin
> >
> >               -----Original Message-----
> >               From:   Peter Beaty [SMTP:PETER.J.BEATY@usa.dupont.com]
> >               Sent:   Thursday, February 04, 1999 6:54 AM
> >               To:     jpr@ix.netcom.com; reflector@awpi.com
> >               Subject:        Re: REFLECTOR: Bearing AD
> >
> >               At 08:28 PM 2/3/99 -0500, jpr@ix.netcom.com wrote:
> >               >As a matter of fact, I'm just putting in the rear bearing
> > bracket in a
> >               >few days, and discovered that I, too, have the countersunk
> > screws.
> >               >Looks to me like it would make the perfect ramp for the
> > bearing to ride
> >               >over and past the retaining lip.
> >               >
> >               YES, my thoughts exactly!  On the aft bearing, even if there
> > is no axial
> >               force by design, maybe some would develop somehow/someday
> > (Murphy), and the
> >               bearing would start to vibrate out of the bracket.  I dunno,
> > but it was
> >               fast and easy to add the washers, so I did.  Took less time
> > than reading
> >               all the e-mails on this subject!
> >
> >               >My front bearing bracket has the round-head screws which
> > look like
> >               >they'd work much better - except that one of them is canted
> > off to the
> >               >side (so was one of the rear screws too).
> >               >
> >               >Your idea of 7/8" washers under each screw is probably
> > better, but it
> >               >still doesn't "look right" to me, and there would still be
> > some side
> >               >load.
> >               >
> >               The washer is, to me, an acceptible improvement.  The screw
> > is still
> >               "canted", but not as much as before, because the edge of the
> > washer
> >               contacts the bracket, helping resist any further canting or
> > bending of the
> >               screw.  Try it, you'll see what I mean.
> >
> >               Of course, a fully concentric collar would be best, but "is
> > the view worth
> >               the climb"?  Your choice, and my $0.02.
> >
> >               Pete.
> >
> >
> 
> --
> Brian Michalk  <http://www.awpi.com/michalk>
> Life is what you make of it ... never wish you had done something.
> Aviator, experimental aircraft builder, motorcyclist, SCUBA diver
> musician, home-brewer, entrepenuer and SINGLE!