Quality Sitka from Pacific Northwest is inspected many times before being shipped to plane manufacturers; production of airplane spruce at Posey plant; years of experience necessary; process of constant selection and elimination, coupled with careful seasoning; small percentage of log acceptable; stock never out of hands of experts watching constantly for imperfect pieces.
Airplane spruce
Aviation
Aviation ; 24 , n 19
1928
3 pages
3 Figs.
Aufsatz (Zeitschrift)
Englisch
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