Langley memoir on mechanical flight : pt. 1- (1911)
Langley, S. P. (Samuel Pierpont), 1834-1906, Manly, Charles M. (Charles Matthews), 1876-1927 · Washington, D.C. : Smithsonian Institution · leaf 115
eedful therefore to select wide tubes, such as will admit of an easy circulation in consideration of the length of tubing employed without straining the pimip and at th^ same time to allow sufficient room for the efflux of steam. Other considerations enter here, the bearing of which will be seen… … "It is from considerations such as these that, in the course of many ex- periments, copper tubing about 8 mm. in diameter has been adopted. Copper is selected because of its freedom from internal corrosion, easy coiling, and be- cause of its availability in the market. The thinnest tube to be had…
Aeronautics · Flight
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