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REFLECTOR: Re: Ailerons do produce side thrust
Jim, you are talking about the aileron torque tubes coming out of the
wings? That's what Nate was referring to. I just checked mine, they
are also cut very closely, about 1/16" from the bearing, but there is no
detectable lateral throw on the torque tubes through the full range of
aileron travel.
If there is lateral movement, you are right that that would be an
extremely good reason to have a retaining collar for the bearing, more
than just a couple of screws. But I'm still not sure why yours moves
laterally and mine don't.
-John R.
James F. Agnew wrote:
>
> For those of you that think that the ailerons don't produce side thrust I can
> assure you they can. I cut my torque tubes so they were very close to the
> bearing. When I moved the aileron the bearing bracket moved in and out a little.
> The aileron torque tub does not pivot it travels in an arc that produces some side
> movement.
>
> Jim
>
> jpr@ix.netcom.com wrote:
>
> > 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!
>
> --
> //------10--------20--------30--------40--------50--------60--------70--------80
> // James F. Agnew
> // Tampa, FL
> // Velocity 173 FG Elite ( http://www.VelocityAircraft.com/ ) under construction