Air Screw
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Manufacture of all-metal propellers from raw material to finished article, with explanation of "variable pitch" in theory and practice. Of primary interest in aeronautics and general shop classes, general science and vocational groups.
Sources
- Bell & Howell Filmosound Library Catalog of Educational Motion Pictures, 1942 — title, creator, length, format, color, sound, genre, description
Record added 2026-09-26 21:16:36