1945 - Republic Aviation Corp. presents the Rainbow concept.

 


Republic's Bid for Transport Market: The Rainbow, 40 passenger plane proposed by Republic Aviation Corp., has speed above 400 mph. and pressurized cabin for high altitude flights. It is powered by four Pratt and Whitney Major 3,000 hp. engines and booster using exhaust to provide jet assist which adds 200 hp. to each engine. 



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source: Aviation Week | Zetu Harrys Collection