Hi Matt, > Stiener (Germany) apparently had an aluminum frame in their 1926 Alu model. Steiner holded several patents on folding kayaks amd is the earliest commercial manufacturer of a complete frame in Duraluminium I know of. http://www.faltbootkabinett.de/Museum/Typenliste_/Steiner/steiner.html The term Duraluminium (Dural in short) refers to a Aluminium-alloy, containing about 4% of Copper, 0.5% Magnesium, 0.6% Manganese and traces of Iron and Silicium (Römpp Lexikon) and was invented by 1906 by Alfred Wilm. The Aluminium ist rapidly cooled after heating to 500°C and then warm treated for a longer period, which hardens it (like the T6 in 6061T6). The result is a much stronger Aluminium used in airplane construction of that time. can someone translate: "2 mittlere Spanten aus DUR-Aluminum" means the two frames in the middle of the boat are made of Duraluminium. Wieser also used Aluminium. Cheers, Gerald -- Gerald Maroske gum_at_exmail.de Wörthstr. 36 24116 Kiel Tel/Fax: 0431 /1 66 34 http://gum.exhome.de *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Mon Sep 16 2002 - 04:14:47 PDT
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