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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:44, 9 April 2009 | 3,000 × 2,175 (2.7 MB) | BotMultichillT | {{Information |Description={{en|1=One of Langley's Sikorsky YR-4B/HNS-1 helicopters is seen in the 30 x 60 Full Scale Tunnel. The technician is setting up camera equipment for stopped-action rotor-blade photos. Sikorsky built hundreds of R-4 helicopters d |
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