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File:Keystone Y1B-4 (SN 30-281).jpg

Original file (1,800 × 1,209 pixels, file size: 188 KB, MIME type: image/jpeg)

Summary

Description
English: Keystone Y1B-4 bomber, serial number 30-281. This aircraft was originally the first Keystone B-3A to be built; it was converted into a Y1B-4 by adding larger, more powerful Pratt & Whitney R-1860-7 Hornet B radial engines, as well as low-pressure tires.
Date early 1930s
Source U.S. Air Force photo [1] from the image gallery on the website of the National Museum of the United States Air Force.
Author USAF

Licensing

Public domain
This image or file is a work of a U.S. Air Force Airman or employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image or file is in the public domain in the United States.

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Date/TimeThumbnailDimensionsUserComment
current17:18, 25 April 2007Thumbnail for version as of 17:18, 25 April 20071,800 × 1,209 (188 KB)Piotr MikołajskiKeystone Y1B-4 (S/N 30-281). The first B-3A was converted to Y1B-4 configuration with the addition of R-1860-7 radial engines and low pressure tires. Image taken from [http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=2439 National Museum of t

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