Tires/Gear Leg/Toe In

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Re: Tires/Gear Leg/Toe In

Postby tps8903 » Mon Nov 20, 2023 3:28 pm

Bryan Cotton wrote:Chris,
I had 3 thoughts on how to do it:
1) weld up the axles and then redrill.
2) make a sleeve, drill to the gear leg. Slot the original. Get it lined up, mark/tack weld it, then weld for real.
3) buy new weldments.

Would like to see your setup for checking alignment.


I took the tires off the rim. Used metal straight edges clamped to the face of the rims. Measured, did the math. Just like a car alignment. They are visibly toe out which was alarming before I even measured anything.

How would one match drill the hole with new weldments?
Chris Morris
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Re: Tires/Gear Leg/Toe In

Postby Bryan Cotton » Mon Nov 20, 2023 3:50 pm

Somebody had a picture of description. I'll have to see if I can find the thread. Basically you make a drill jig aligned with the gear hole. It is clamped onto the gear leg above the weldment.
Bryan Cotton
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Re: Tires/Gear Leg/Toe In

Postby Bryan Cotton » Mon Nov 20, 2023 3:58 pm

Bryan Cotton
Poplar Grove, IL C77
Waiex 191 N191YX
Taildragger, Aerovee, acro ailerons
dual sticks with sport trainer controls
Prebuilt spars and machined angle kit
Year 2 flying and approaching 200 hours December 23
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Re: Tires/Gear Leg/Toe In

Postby tps8903 » Mon Nov 20, 2023 4:49 pm

Bryan Cotton wrote:Somebody had a picture of description. I'll have to see if I can find the thread. Basically you make a drill jig aligned with the gear hole. It is clamped onto the gear leg above the weldment.


I guess I'll have to see how far it rotates to the new position before I decide which method to use.

From a practical stand point. What would be the problem with drilling a new hole slightly above the original?
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Re: Tires/Gear Leg/Toe In

Postby Area 51% » Mon Nov 20, 2023 5:25 pm

I had a similar issue. I had a machine shop relocate the mounting holes at the engine mount. This involved rotating the leg the required degree, and use a 5/16 bit. Then I bushed the hole back to 1/4.

I .
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Re: Tires/Gear Leg/Toe In

Postby jerryhain » Tue Nov 21, 2023 1:07 pm

I had the same problem. I just removed the bolt. Did the alignment, drilled a new hole about an inch above it 90° to the original hole and installed the bolt there. Then I elongated the holes in the weldment and installed second bolt in the original hole through the axle. I really should weld that back up and re-drill but I decided if one bolt was good enough to maintain the alignment. I didn’t need to do the second bolt properly.
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Re: Tires/Gear Leg/Toe In

Postby tps8903 » Tue Nov 21, 2023 2:17 pm

jerryhain wrote:I had the same problem. I just removed the bolt. Did the alignment, drilled a new hole about an inch above it 90° to the original hole and installed the bolt there. Then I elongated the holes in the weldment and installed second bolt in the original hole through the axle. I really should weld that back up and re-drill but I decided if one bolt was good enough to maintain the alignment. I didn’t need to do the second bolt properly.


Thanks,

That's exactly what I wanted to know.
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Re: Tires/Gear Leg/Toe In

Postby Bryan Cotton » Wed Nov 22, 2023 12:36 am

Started swapping my tires tonight. This is about 110 hours or so.
new vs old tire.png
new vs old tire.png (473.22 KiB) Viewed 6683 times
Bryan Cotton
Poplar Grove, IL C77
Waiex 191 N191YX
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dual sticks with sport trainer controls
Prebuilt spars and machined angle kit
Year 2 flying and approaching 200 hours December 23
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Re: Tires/Gear Leg/Toe In

Postby Skippydiesel » Wed Nov 22, 2023 4:52 am

Wow! Fortunately I fly off grass, most of the time - I am hoping for a long tyre service life
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Re: Tires/Gear Leg/Toe In

Postby GordonTurner » Wed Nov 22, 2023 12:54 pm

Wow. Are you sure you have the correct alignment? I guess you can extend that if you swap them every oil change. Any opinions if it would be ok to just swap the whole wheel, in which case the direction of rotation would be reversed? Is there a bearing problem if you do this?

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