Image: Sikorsky R-4 USAAF
Size of this preview: 800 × 488 pixels. Other resolutions: 320 × 195 pixels | 2,014 × 1,229 pixels.
Original image (2,014 × 1,229 pixels, file size: 333 KB, MIME type: image/jpeg)
Description: Sikorsky R-4 in a hover
Usage Terms: Public domain
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