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Control System Interference

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ethand

Well Known Member
I am looking for a bit of direction and ideas from the VAF think-tank.

I posted a few days ago about my stick grip contacting the throttle. I think I have the mostly resolved or a path forward (waiting on parts). But as I work towards certification I came across another issue.

The nuts on the F-1065 Pushrod assembly contact the F-1033 bearing holder assembly (section 39 page 7 and 8). This happens when aileron is at full deflection and elevator is full aft. What adjustments do I have for this?

Both ailerons and elevator are rigged per the plans. Elevator is getting full deflection per the plans. I do not see a required deflection for the ailerons? Is that in the plans somewhere? Maybe limiting the ailerons (assuming i have whatever is required for deflection) may help both issues.

At a bit of a loss and would appreciate thoughts

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Thanks Justin, I looked at that but have yet to try it. Will see if it helps.

Do you know if there is a spec for aileron up and down deflection? I see it for elevator and rudder but not ailerons.

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It is on pages 1/2 of the Final Inspection and Flight Test section.
I am not sure which kit that section comes with.
Aileron minimum travel Up 25, Down 15 degrees
 
Thanks Rich!

I was able to flip the bolt that Justin did and cleared bearing holder assembly.

All is clean now, will confirm the aileron travel

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Hey all, I wanted to pile on this post and ask if anyone else had experienced the issue here. Just like ethand, at full aileron deflection (to either side) and full aft with the stick, I was getting interference due to the AN365 nut rubbing against F-1033. I flipped the bolts around and the left side is now fully clear, but the right side still has some contact / rubbing in the "corner" of the aileron/elevator deflection box.

I bet I could fix this by slightly limiting the nose-up elevator travel, but my stops are already set up and I'd prefer to avoid that.

What do folks think of the option of grinding a small amount of clearance into F-1033?

For fun and posterity, here's the interference before I flipped the bolt around. (I also learned recently from Vic's book that torque-seal is not required on AN365-1032 nuts... still, I like the look of it :)

IMG_6404.jpg
 
sritchie said:
Hey all, I wanted to pile on this post and ask if anyone else had experienced the issue here. Just like ethand, at full aileron deflection (to either side) and full aft with the stick, I was getting interference due to the AN365 nut rubbing against F-1033. I flipped the bolts around and the left side is now fully clear, but the right side still has some contact / rubbing in the "corner" of the aileron/elevator deflection box.

I bet I could fix this by slightly limiting the nose-up elevator travel, but my stops are already set up and I'd prefer to avoid that.

What do folks think of the option of grinding a small amount of clearance into F-1033?

For fun and posterity, here's the interference before I flipped the bolt around. (I also learned recently from Vic's book that torque-seal is not required on AN365-1032 nuts... still, I like the look of it :)

View attachment 104097
Click to expand...
Maybe I'm missing something, but it looks like you could reverse that bolt and put an "L" washer under it. Also, you may be able to change the geometry of the elevator pushrods a little so the control stick and its bolts/nuts don't get so close to the structure.
 
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Kyle Boatright said:
Maybe I'm missing something, but it looks kike you could reverse that bolt and put an "L" washer under it. Also, you may be able to change the geometry of the elevator pushrods a little so the control stick and its bolts/nuts don't get so close to the structure.
Click to expand...
Yes, sorry, I should have been more clear — that was the photo before my first intervention, which was to reverse the bolt. That worked completely on the pilot side, but on the copilot side I still get some rubbing against the head of the bolt. I will think about how I could change the geometry, I'm just hoping that someone with experience here can weigh in and say "oh, yeah, filing that part down a bit is totally fine". As I type it out I realize I should probably call Vans here!
 
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