Hiller Hoe and Sikorsky HR2S-1 aircrafts at Forum12, 1956
View from aircraft display at Forum 12, 1956. Hiller Hoe and Sikorsky HR2S-1 aircrafts are seen here.
Vertical Flight Society's (formerly American Helicopter Society - AHS) Annual Forum 12, 1956, May 2-5, 1956 at Washington, D. C., USA
Source: Vertiflite (AHS Newsletter) April-May 1956 (Vol.2 No. 4)
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