File:PW-Allison 578-DX (1987).png

Summary

Description: An early version of the PW-Allison 578-DX w:propfan demonstrator w:engine. This engine core was designed by the w:Allison Engine Company division of w:General Motors, with the w:contra-rotating fans designed by w:Hamilton Standard, the inventor of the propfan concept. w:Pratt & Whitney, like Hamilton Standard a division of w:United Technologies, invested in the program in 1986 and is tasked with aircraft integration and flight test coordination.

Source: "Toward future flight" in Spinoff (PDF) (1,987^th ed.), NASA, pp. 30–33 OCLC: 17914180.

Licensing

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