REFLECTOR: Canard Center Hinge

Tue Mar 22 20:02:11 CDT 2011

Sounds like you have it figured out, Richard. Let me know if you need me and
I'll be happy to research my parts, etc.

Dennis Martin

On Tue, Mar 22, 2011 at 6:34 PM, Richard J. Gentil <
richard at naples-air-center.com> wrote:

> Mystery Solved
>
> I had a little time this afternoon so I pulled the canard. It turned out
> the previous owner of my kit, some 10+ years ago had moded the center hinge
> bushings in favor of bearings. Two issues with the mod,  first, the bearings
> were too small so there was play. You can see the old bearing next to one of
> the new ones:
>
> [image: image.jpeg]
>
> Second he had pressed in the center hinge a plastic bearing which had a lip
> on the outside of each side of the center hinge, this meant that the bolt
> holding the bearings could pivot and that is why I ended up with the split
> in the elevators.
>
> The new bearings, thanks Don, will fit tight so no play. And I removed the
> plastic lip on each side of the center hinge so the washers against the
> center hinge will lay flat, not allowing any play in the bolt. If I remember
> Friday to take pictures and I reassemble the canard, I will send a picture
> of the new assembly.
>
> Richard
>
> Sent from my iPhone 4
>
> On Mar 21, 2011, at 7:47 PM, "Scott Baker" <scottb33333 at gmail.com> wrote:
>
> The relative locations of the trim spring and the 'sparrow strainer' should
> not affect the differential elevator positions that you are seeing.
> If the elevator positions are changing relative to one another in flight,
> you should be able to duplicate this movement on the ground.
> Immobilize one of the elevators by 'C-clamping" it to the wing tip.
> Manipulate the opposite elevator to see if there is movement.
> If movement is present, determine where the 'slop' is occuring.  It may be
> in the outboard bushings of the concentric elevator torque tubes; or where
> the left and right torque tubes are joined together.  Note: be sure to use
> two bolts to attach the left and right elevator torque tubes together.  The
> one bolt that connects the elevator push-pull rod end to the torque tubes is
> not, in itself, enough.  Tighten everything to ensure both elevators work
> together and do not slip differentially.
> Scott B.
>
> ----- Original Message -----
> *From:* Richard J. Gentil <richard at naples-air-center.com>
> *To:* Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> *Sent:* Monday, March 21, 2011 7:14 PM
> *Subject:* Re: REFLECTOR: Canard Center Hinge
>
> Question I have, I attached the Sparrow on the right side elevator and I
> have the trim spring attached to the left side elevator torque tube. I am
> wondering if this is contributing to the issue since they are opposing
> forces on the elevator.
>
> I am wondering if it would be worth moving the sparrow to the left elevator
> so the trim spring and sparrow are on the same side. (Due to the avionics
> there was no room for the trim spring on the right elevator torque tube.)
>
> Is there a specific reason the factory calls for the trim spring on the
> left and the sparrow on the right?
>
> Richard
>
> Sent from my iPhone 4
>
> On Mar 21, 2011, at 12:23 PM, "Richard J. Gentil" <<richard at naples-air-center.com>
> richard at naples-air-center.com> wrote:
>
>   Al,
>
> That would be fantastic thank you!
>
> Richard
>
> Sent from my iPhone 4
>
> On Mar 21, 2011, at 1:03 PM, "Al Gietzen" < <ALVentures at cox.net><ALVentures at cox.net>
> ALVentures at cox.net> wrote:
>
>   Richard;
>
>
>
> I used self-aligning ball bearings that bolt to the center pivot support.
>  The o.d. of these bearings fit snugly inside the ends of the torque tubes
> (concentric version). I haven’t been able to find a photo. With some
> research I could probably find the bearing part # (from Aircraft Spruce).
>
>
>
> Al
>
>
>
> -----Original Message-----
> *From:* <reflector-bounces at tvbf.org> <reflector-bounces at tvbf.org>
> reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] *On Behalf
> Of *Richard J. Gentil
> *Sent:* Sunday, March 20, 2011 11:16 AM
> *To:* Velocity Aircraft Owners and Builders list
> *Subject:* Re: REFLECTOR: Canard Center Hinge
>
>
>
> Dennis,
>
>
>
> I would appreciate pictures and yes I am talking about the bushing dead
> center.
>
>
>
> Richard
>
> Sent from my iPhone 4
>
>
> On Mar 20, 2011, at 1:21 PM, Dennis Martin < <dennis.doc at gmail.com><dennis.doc at gmail.com><dennis.doc at gmail.com>
> dennis.doc at gmail.com> wrote:
>
>  Are we talking about the bushing at dead center between the two
> elevators? If so, I redesigned that. I inserted needle bearings inside each
> elevator tube. Next I took a steel shaft (recycled from an electric motor)
> and inserted it in aluminum fork in the middle. Now each elevator tube
> slides into the steel shaft. No way for it to work loose. I can send photos
> if anyone's interested.
>
> Dennis
>
> On Sat, Mar 19, 2011 at 9:25 PM, Richard J. Gentil <<richard at naples-air-center.com><richard at naples-air-center.com><richard at naples-air-center.com><richard at naples-air-center.com>
> richard at naples-air-center.com> wrote:
>
> I was on my third test flight today and I noticed the elevators  were no
> longer trailing at the same angle so I landed immediately. Here are the
> shots from 5,500 feet at 120kts IAS (130kts TAS).
>
> (Second picture of the canard will be in the next email.)
>
>
> After landing I seem to have some play at the oilite bushing. Everything
> else is tight from what I can tell. All that is left is the bushing. From
> what I am guessing is that the left elevator has the pressure of the pitch
> trim spring and the right elevator has the downward pressure of the sparrow
> strainer.
>
> Any ideas would be helpful. My plan is to remove the canard and examine the
> oilite bushing.
>
> Richard
>
> Sent from my iPhone 4
>
>
> _______________________________________________
> To change your email address, visit
> <http://www.tvbf.org/mailman/listinfo/reflector><http://www.tvbf.org/mailman/listinfo/reflector><http://www.tvbf.org/mailman/listinfo/reflector><http://www.tvbf.org/mailman/listinfo/reflector>
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery!   <http://www.tvbf.org/gallery><http://www.tvbf.org/gallery><http://www.tvbf.org/gallery><http://www.tvbf.org/gallery>
> www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: <http://www.tvbf.org/pipermail><http://www.tvbf.org/pipermail><http://www.tvbf.org/pipermail><http://www.tvbf.org/pipermail>
> www.tvbf.org/pipermail
> Check old archives: <http://www.tvbf.org/archives/velocity/maillist.html><http://www.tvbf.org/archives/velocity/maillist.html><http://www.tvbf.org/archives/velocity/maillist.html><http://www.tvbf.org/archives/velocity/maillist.html>
> http://www.tvbf.org/archives/velocity/maillist.html
>
>
>
>
> --
> All the best,
> Dennis
>
>  _______________________________________________
> To change your email address, visit
> <http://www.tvbf.org/mailman/listinfo/reflector><http://www.tvbf.org/mailman/listinfo/reflector><http://www.tvbf.org/mailman/listinfo/reflector><http://www.tvbf.org/mailman/listinfo/reflector>
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery!   <http://www.tvbf.org/gallery><http://www.tvbf.org/gallery><http://www.tvbf.org/gallery><http://www.tvbf.org/gallery>
> www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: <http://www.tvbf.org/pipermail><http://www.tvbf.org/pipermail><http://www.tvbf.org/pipermail><http://www.tvbf.org/pipermail>
> www.tvbf.org/pipermail
> Check old archives: <http://www.tvbf.org/archives/velocity/maillist.html><http://www.tvbf.org/archives/velocity/maillist.html><http://www.tvbf.org/archives/velocity/maillist.html><http://www.tvbf.org/archives/velocity/maillist.html>
> http://www.tvbf.org/archives/velocity/maillist.html
>
>  _______________________________________________
> To change your email address, visit
> <http://www.tvbf.org/mailman/listinfo/reflector><http://www.tvbf.org/mailman/listinfo/reflector><http://www.tvbf.org/mailman/listinfo/reflector>
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery!   <http://www.tvbf.org/gallery><http://www.tvbf.org/gallery><http://www.tvbf.org/gallery>
> www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: <http://www.tvbf.org/pipermail><http://www.tvbf.org/pipermail><http://www.tvbf.org/pipermail>
> www.tvbf.org/pipermail
> Check old archives: <http://www.tvbf.org/archives/velocity/maillist.html><http://www.tvbf.org/archives/velocity/maillist.html><http://www.tvbf.org/archives/velocity/maillist.html>
> http://www.tvbf.org/archives/velocity/maillist.html
>
>  _______________________________________________
> To change your email address, visit
> <http://www.tvbf.org/mailman/listinfo/reflector><http://www.tvbf.org/mailman/listinfo/reflector>
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery!   <http://www.tvbf.org/gallery><http://www.tvbf.org/gallery>
> www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: <http://www.tvbf.org/pipermail><http://www.tvbf.org/pipermail>
> www.tvbf.org/pipermail
> Check old archives: <http://www.tvbf.org/archives/velocity/maillist.html><http://www.tvbf.org/archives/velocity/maillist.html>
> http://www.tvbf.org/archives/velocity/maillist.html
>
>  ------------------------------
>
> _______________________________________________
> To change your email address, visit
> <http://www.tvbf.org/mailman/listinfo/reflector>
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery!  <http://www.tvbf.org/gallery>www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: <http://www.tvbf.org/pipermail>www.tvbf.org/pipermail
> Check old archives: <http://www.tvbf.org/archives/velocity/maillist.html>
> http://www.tvbf.org/archives/velocity/maillist.html
>
> _______________________________________________
> To change your email address, visit
> <http://www.tvbf.org/mailman/listinfo/reflector>
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery!   <http://www.tvbf.org/gallery>www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: <http://www.tvbf.org/pipermail>www.tvbf.org/pipermail
> Check old archives: <http://www.tvbf.org/archives/velocity/maillist.html>
> http://www.tvbf.org/archives/velocity/maillist.html
>
>
> _______________________________________________
> To change your email address, visit
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery!  www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>

-- 
All the best,
Dennis
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.tvbf.org/mailman/private/reflector/attachments/20110322/b8bb26f3/attachment-0001.htm>