PeterNSteinmetz Administrator Staff member Oct 21, 2020 #1 Interesting prototype German aircraft - https://www.smithsonianmag.com/smit...n-hortens-all-wing-aircraft-design-180976095/
Interesting prototype German aircraft - https://www.smithsonianmag.com/smit...n-hortens-all-wing-aircraft-design-180976095/
