Okay . . . Who Is Actually On First?

whosonfirstbudandlou

While building five airplanes and tinkering with dozens more, I have worked with a lot of types of aluminum; 1100, 3003, 5052, 2024, 6061, and 7075 alloys – in various stages of temper; 0, H14, H32, H34, T3, T351, T42, T6, T651 all in both bare and Alclad finish.

I have purchased the aluminum from probably as many as 12 different sources over the years and have never once seen it listed as “Aircraft” aluminum.  Yet, browsing though any automotive, boating, motorcycle, lawnmower, kitchen appliance, etc. catalog will produce any number of items manufactured out of “Aircraft Grade” aluminum.

Being a born worrier, it has always bothered me that I didn’t know what this “Aircraft Grade” aluminum really was . . . until last night. While looking through a new aircraft accessory catalog (of all things), I came across a page of GPS mounting kits that were made of . . .

You got it!

Marine Grade” aluminum.

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One Comment on “Okay . . . Who Is Actually On First?”


  1. I noticed you skirted the question nicely….aircraft grade aluminum. I have bought many things spec’d that way….skid plates, radiator gaurds, frame gaurds, disk gaurds,etc.
    Takes a licking and keeps on ticking…um, working.

    JJ


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