Worldwide Engineering - The Lippisch P.13a was an experimental ramjet-powered delta wing interceptor aircraft designed in late 1944 by Dr. Alexander Lippisch for Germany. Research in high-speed wind tunnels indicated that the
Könnte Deutschlands geplanter Düsenjäger mit Kohleantrieb, die Lippisch P. 13a, überhaupt funktioniert haben? - Quora
![We asked a former British technical liaison to assess Germany's Lippisch P 13: coal-powered supersonic wonder plane? | Hush-Kit We asked a former British technical liaison to assess Germany's Lippisch P 13: coal-powered supersonic wonder plane? | Hush-Kit](https://hushkit.files.wordpress.com/2019/03/55624179_10157091386388252_751023058029903872_o.jpg)