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"The Lippisch P.13a was an experimental ramjet-powered delta wing interceptor aircraft designed in late 1944 by Dr. Alexander Lippisch for Nazi Germany. The aircraft never made it past the drawing board, but testing of wind-tunnel models in the DVL high-speed wind tunnel showed that the design had extraordinary stability into the Mach 2.6 range.[1]
As conventional fuels were in extremely short supply by late 1944, Lippisch proposed that the P.13a be powered by coal."
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I had no idea...
As conventional fuels were in extremely short supply by late 1944, Lippisch proposed that the P.13a be powered by coal."
Source
I had no idea...