Control stick torque tube

[marcusofcotton]

The problem is this subject was brought up three years ago and the fix was noted . New builders don't get the information . I recall Mark actually had the factory joggle the bracket as Brooks picture shows but one does need two install a small washer on each side of the bearing to keep the rod end centered . There should NOT be any movement of the rod end threads , the jam nut should be secured allowing only the bearing to do its job . Stinger

https://bearhawkforums.com/forum/bearhawk-lsa-plans-build/52893-bearhawk-lsa-annual-inspection

https://bearhawkforums.com/forum/bearhawk-patrol-plans-build/18642-control-stick-pushrod

[DBeaulieu]

FYI, I received my Q/B fuselage kit 5 months ago and the idler arm has not been joggled. I am not at the point where I can say whether or not it is a problem. I would like to see a jam nut on that rod end bearing. I'm thinking that idler arm could possibly be made with a 3/4 or 7/8 tube versus 5/8 and then spacers for the thru bolt as required would give the clearance.

[arborite]

well i think the problem is that the rod end shipping with the kit is different now. look at Brooks picture. there is no shoulder on the joint, allowing it to pivot much more with a spacer installed. now look at the drawing of the joint I got. it has a shoulder that limits travel. that’s the issue.

[Mark Goldberg]

Knowing how much movement is required is difficult until you actually have your ailerons hooked up and moving. Over the years I have been told that there wasn't enough movement of stick or stick assy. But it was pretty much always builders who did not have their ailerons actually hooked up. On the LSA & Patrol, when the controls are fully hooked up there is usually more travel than spec'd on the plans and stops have to be installed. Mark

[arborite]

We will see once everything is rigged but the calculated angular displacement at the stick, based on the bellcrank ratio stack up, is about +/-13 degrees needed with no margin.