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Airdale's Bush Gear

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Posted

You are right Ed!!! Thank you. Going to the city tomorrow to hopefully find some tubing I can spot weld on the washers to hold the springs in place.

Thanks for the support!!! :)

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Posted

Spot-weld tubing to washers?  Guess you know why?  The setup with washer under original cap spot welded as you show in the photo looks like it would work?   EDMO

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Posted

Making the slots longer is easy to do with a cut off wheel in the dremel and a couple files.  Round and flat.  Took me about 10 minutes to do.  I can't tell you that you can't bottom the springs out, I can say that I have not yet done it.  Hopefully when I get home the weather will cooperate and I will mount the gopro under the plane and see if I can get some video or giving the springs a work out.

:BC:

 

 

 

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Posted

Spot-weld tubing to washers?  Guess you know why?  The setup with washer under original cap spot welded as you show in the photo looks like it would work?   EDMO

What he wants to do is take a piece of tubing that fits inside the spring and cut it about 1 inch long, then weld them to the washers, that way the spring slides over the tubing and holds it in place  and does not flop around, I know this because I have a piece of tubing sitting on the bench right now to do the exact same thing. Great minds think alike Mr.

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Posted (edited)

Spot-weld tubing to washers?  Guess you know why?  The setup with washer under original cap spot welded as you show in the photo looks like it would work?   EDMO

What he wants to do is take a piece of tubing that fits inside the spring and cut it about 1 inch long, then weld them to the washers, that way the spring slides over the tubing and holds it in place  and does not flop around, I know this because I have a piece of tubing sitting on the bench right now to do the exact same thing. Great minds think alike Mr.

Ha!  Guess I don't have one of the "Great minds", because I didn't see that! - Maybe just poor sight?  ;<)  Guess there is also some way to combine that with "hats" and reduce the preload pressure too?   I got a tentative price on what the Poly-Donuts cost for the Skyote88 landing gear:  about $14 each.  Don't know if that is priced for "stock" rubbers, or custom-made.   EDMO

Edited by EDMO
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Posted

Spot-weld tubing to washers?  Guess you know why?  The setup with washer under original cap spot welded as you show in the photo looks like it would work?   EDMO

What he wants to do is take a piece of tubing that fits inside the spring and cut it about 1 inch long, then weld them to the washers, that way the spring slides over the tubing and holds it in place  and does not flop around, I know this because I have a piece of tubing sitting on the bench right now to do the exact same thing. Great minds think alike Mr.

Ha!  Guess I don't have one of the "Great minds", because I didn't see that! - Maybe just poor sight?  ;<)  Guess there is also some way to combine that with "hats" and reduce the preload pressure too?   I got a tentative price on what the Poly-Donuts cost for the Skyote88 landing gear:  about $14 each.  Don't know if that is priced for "stock" rubbers, or custom-made.   EDMO

Ed,

Do you have any dimensions on the donuts or how many per side he is using?  I am really interested in these!

 

 

 

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Posted (edited)

Spot-weld tubing to washers?  Guess you know why?  The setup with washer under original cap spot welded as you show in the photo looks like it would work?   EDMO

What he wants to do is take a piece of tubing that fits inside the spring and cut it about 1 inch long, then weld them to the washers, that way the spring slides over the tubing and holds it in place  and does not flop around, I know this because I have a piece of tubing sitting on the bench right now to do the exact same thing. Great minds think alike Mr.

Ha!  Guess I don't have one of the "Great minds", because I didn't see that! - Maybe just poor sight?  ;<)  Guess there is also some way to combine that with "hats" and reduce the preload pressure too?   I got a tentative price on what the Poly-Donuts cost for the Skyote88 landing gear:  about $14 each.  Don't know if that is priced for "stock" rubbers, or custom-made.   EDMO

Ed,

Do you have any dimensions on the donuts or how many per side he is using?  I am really interested in these!

 

 

 

Leni,  From the photo in Kitplanes, he has two of the lighter, 60A shore Yellow donuts on the top of each strut, and three of the blue or green 80A shore donuts on the bottom.  He gave me a dimension of 2.5" (OD?) x 1.75", and I don't know if that is ID or length of each.  If you go to "Polyurethane Products" site, and click on "Open End Punch Strippers" they only show ID of 1", length of 1" and OD max about 2.6" if I read it right for standard donuts.  Maybe his was custom made - and the site talks about doing that too.  He said he experimented with 60 to 90 shore donuts to get his landing gear tuned.  I think there is a load chart on there too.  I have not taken the time to study it farther.  Hope this helps.  I wrote to the company for info and prices about 10 days ago and never got an answer - John gave me price he paid of $14 each.  Let me know if you find out more on these.  EDMO

Edited by EDMO
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Posted

Progress. I found a local machine shop (50 miles away) and with in 15 minutes he had me fixed up, once I conveyed what I wanted. He has a CNC plasma torch table. He cut out of 1/4" plate the spring locators. I also have him cutting the slots and drilling the holes.

To further explain why I wanted it light, I told him it was for an airplane. Most people balk! He didn't flinch... Next week I will be putting it together. Lord knows I am ready!!!

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Posted

I have the parts welded and painted... I have  to compress the springs... Any ideas? I was thinking a vise with large zip ties.. I only have  to compress them an inch and a half or so...

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Posted (edited)

 

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Edited by Fly-n-Low

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Posted

And the elongated slot. Everything has been deburred and polished, painted, etc. I'll have to repost the photos of when I started this since photobucket crapped out.

Thanks for the input, guys!!!

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Posted (edited)

You probably wont find a zip-tie that will hold the pressure - spring compressor is threaded rod or rods with hooks or bars on each end - need one for each side of spring.  You can probably make them.  Be careful.  EDMO

Edited by EDMO

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Posted

I used a 10" vice.  I have also done it with a pipe clamp but you should really use 2 of them and its sketchy at best :lol:  I need to come up with a way to change these out without risking your life with flying springs.

Thinking maybe 2 slotted plates with all thread on each side to slip over the collars and then use the all thread to compress the spring.  Should be a pretty easy tool to make.

:BC:

 

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