Image: "Strength tests on DH-4 airplane wing ribs Project-L-225-2" from- Forest Products Laboratory for Research Work during the war. Illustrating the development in designing a wing rib for De Haviland airplane - NARA - 17341228 (cropped)
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Description: Scope and content: Photographer: U.S. Dept. of Agriculture
Title: Airplanes - Wings - Forest Products Laboratory for Research Work during the war. Illustrating the development in designing a wing rib for De Haviland airplane. The improved wing rib as designed is 30 per cent light in weight and has more than twice the strength of the original rib of the Government Forest Service
Credit: U.S. National Archives and Records Administration
Author: Unknown authorUnknown author or not provided
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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