Summary

Boeing Y1B-9 test flight, 1932, with its retractable landing gear extended.

Licensing

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. العربية ∙ беларуская (тарашкевіца) ∙ català ∙ čeština ∙ Deutsch ∙ English ∙ español ∙ eesti ∙ فارسی ∙ suomi ∙ français ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ മലയാളം ∙ မြန်မာဘာသာ ∙ norsk bokmål ∙ Plattdüütsch ∙ Nederlands ∙ polski ∙ português ∙ português do Brasil ∙ русский ∙ sicilianu ∙ slovenčina ∙ slovenščina ∙ српски / srpski ∙ svenska ∙ Türkçe ∙ українська ∙ Tiếng Việt ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−

Source: USAF photo Scanned from Page 29 of the following book. Photo caption explicitly credits this as a US Air Force photo, and front matter confirms that all photos are USAF except for those credited differently.

• McCarthy, James P. (2005) The Air Force , Levin, Hugh Lauter Associates, pp. 368pp