HELICOPTER - VIBRATIONS AND RESONANCE, PT 3, VIBRATIONS IN THE H-21
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✎ Suggest a correctionTell-tale vibrations in the H-21 are demonstrated, and traced to the cause.
Sources
- usgov-av-1974 — title, year, creator, length, color, sound, description
Record added 2026-07-01 03:45:48 · Suggest a correction