A technician at Langley Research Centre sets up equipment for photographing the Sikorsky YR-4B/HNS-1 helicopter as it undergoes wind tunnel experiments. The Sikorsky Company built hundreds of these helicopters during World War II,making it the first mass-produced helicopter | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / NASA / Science Source |
Taille de l’image : | 3000 px × 2175 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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