I need about 600 feet of aluminun tube for my homebuilt airplane.
Onlinemetals, they will also cut it to the exact length for you alsoYou should use preexisting plans like the Hummel Bird which only costs about $5000You should use eithet 6061 aluminum or 2024 depending on the partYou can also get just about any other metal youll need, and in any form, from bar to plate, to diamond plate.
