Posted: 11/11/2009 12:36:26
I'm finding it difficult to acquire long sections of 2024 angle in 2x2 (.063). I live in the Dallas-FW area and you would think it would be available in an area with 6.5 million people!
What thoughts are there on substituting 6061 for 2024? I know there are some homebuilts that are made of 6061, not sure which though.
Where can I get 2024 angle in long sections without a mortgage?!
Posted: 11/12/2009 09:39:13
Your question is not trivial - 2024 is generally substantially stronger than 6061, but it also depends on how the material has been heat-treated. For example, 2024-T351 is more than 4 times stronger than 6061-O, while 6061-T6 is 1.5 times stronger than 2024-O.
So, before you take out the mortgage, make sure you get a data sheet on the specific material you buy as well as a data sheet for the material you want to replace.
I suspect this has made your life more complicated - not simpler. But good luck anyway.
Posted: 11/13/2009 11:44:29
you might want to start by asking a supplier such as Castel Aerospace Metals which is now a divisions of transtar metals
You'll also have better luck is you can specify which extrusion profile you want. AND10133 is the equal leg extrusion that is most common. These have dash numbers so the callouts for 2X2 equal leg angle would be AND10133-2001, -2002, -2003, -2004 with each increase increasing in leg thickness. So get the standard and determine what you need. There is NO sense in lugging around extra weight so choose based on the structural need rather than the old adage "if in doubt make it stout".
You'll also likely find MORE choices available in 7075 material than 2024. If I was to choose 7075, I'd specify T6511 if it was painted and T7351 if it wasn't. 2024 will need to be painted in any temper.
Posted: 11/13/2009 20:04:48
If you are building a proven design from plans, please DO NOT substitute 6061 for 2024. It would be unfair to the designer if a part of the aircraft failed due to the switch in materials. If you're building your own design, you can certainly use anything you want. If you don't know how to calculate the loads and stresses, you can perform a load test on the completed structure, but run the risk of destroying it in the process. Even then, you'll need some idea of the loads in order to set up the test properly!
Frank Gaggia, Jr.
Posted: 11/14/2009 19:33:24
I thought about substituting 6061 T-6 for the S mod wing spar straps in my Sonerai, since I have quite a lot of 6061 on hand. However, I found that the strength of the 6061 was about 80% of the 2024 T-3. I decided not to sub for two reasons: 1. the wing would be weaker than designed, and 2. I believe I'd have to placard the aircraft because it would no longer be rated at +6/-4 G. I really don't want to make my Sonerai weaker than most, and I don't want to fly while constantly wondering about spar strength.
Posted: 11/18/2009 21:10:54
Alro may be able to help you out
make sure to specify the condition. i.e. O, T3 …
Looks like spruce only has that sock in .125 thick. If you still have trouble I would call up the designer and ask for a supplier.
Don’t substitute an alloy or temper with out the designer / manufactures blessing.
Posted: 11/18/2009 22:26:14
TO fellow EAAER you should try dillsburg aeroplaneworks in PA/ REFERENCE CHARLES VOGELSONG/ I found 2024 T-6, 2x2 spar material here .. AS only a word of caution I would not substitute, build as plans call for/ as engineered... TY
Posted: 11/20/2009 15:03:45
Bede corp sells the 2x2 brake angle your looking for.
it's cheaper to get it from them than to have it formed by a shop.
most expensive part is shipping.
Posted: 11/24/2009 07:44:14
I think most of us are assuming you were looking for extruded angle and not formed angle - is that accurate? What type of aircraft are you working on (certified, or homebuilt)? Even if it's certified you may be able to justify a material substitution by compensating for the strength difference and with adequate engineering to support it. However, it would be less work just to find the correct material and size.
Posted: 11/26/2009 10:10:40
Jay, call Trident Metals Inc. Richardson . 972-231-5176
Major aluminum supplier. Good prices.