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Where can I get aluminum for landing gear?

540 Views 10 Replies 9 Participants Last post by  xjet
Does Home Depot or Lowes carry aluminum adequate for making some landing gear for my Su-Do-Khoi? I just put together the ARF and whatever pot metal they used on the landing gear looks woefully inadequate, plus it doesn't quite let the plane "stand" tall enough.
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Ive gotten some from Lowes to use on spads.....it works but not sure its quite strong enough for heavy duty use.....Just get 1/8 by 3/4 or so...or maybe an inch.
2nd the Lowes aluminum. It is a bit soft, but works well. If you have 2 pairs of vice grips you can bend them back to shape at the field.

Lowes is almost a hobby store to me :lol:
I've gotten aluminum from both Lowe's and Home Depot. They work fine and are bendable with a small vise. If you got some spare change though, get some Crazy Legs.

J.
yeah, the alum LG are yesterdays news,,,go with the Crazy legs from TETHERITE....G
What you really want for undercarriage legs is 7075 or one of the other 7000 series alloys.

These aren't usually available in hardware stores -- most of their stuff is 6061 or 5000 series which is nowhere near as strong.

You can use this hardware-store stuff but you'll pay a weight penalty because it has to be thicker to provide the same amount of strength.

One solution to the "bendy legs" that sometimes result from the wrong grade of alloy is to run some thin piano (or braided stainless) wire between the axle bolts so they can't spread. Unfortunately this will have the side effect of reducing the gear's ability to reduce landing shocks -- but then again we all land like a feather don't we :-?
Where do you get that grade of Aluminum xjet?
Try a industrial supply company Paul.....Like your local welding an steel sales.
McMaster has 7075, but it is pricey. a 12" x 12" @ 1/8" thickness is $36, 12 x 24 is $52.They also have T4 2024 grade material which has better forming characteristics, and an 1/8"x 1" x 6' is $20. The same size of 6061 T6 is $6. www.mcmastercarr.com search for aluminum bar.
Home Depot 1'' X 1/8 6061 they sell it by 4' links cheep like $
4.00 enough to make a few pairs I have been using it an it works great still flexible on hard landings I dorked on the thumbs in a hover at 20' slammed them flat bent them back out and are still using them now.

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RSands said:
McMaster has 7075, but it is pricey. a 12" x 12" @ 1/8" thickness is $36, 12 x 24 is $52.They also have T4 2024 grade material which has better forming characteristics, and an 1/8"x 1" x 6' is $20. The same size of 6061 T6 is $6. www.mcmastercarr.com search for aluminum bar.
I wouldn't opt for 2024 -- it's an alloy better suited to machining than bending or other methods of forming. It cracks and fatigues easily when bent.

7075 can also be anodized rather nicely but 2024 won't anodize for shite. Anodizing can make aluminum look real sexy and it's a *very* simple process. I anodize a lot of the aluminum things I make. If you're making an undercarriage you can anodize it to match the color of your plane :)

7075 shouldn't be any/much more expensive than regular 6061 -- I pay the same price for both around here.

The difference between the various alloys we're talking about is pretty simple:

2000 series has lots of copper in it
5000 series has manganese
6000 series has silicon
7000 series has zinc

Check your local yellow pages for metal wholesalers or fabricators -- or even someone who does aircraft repairs, 7075 is often used in the aerospace industry for its high strength.
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