since you asked for the favorite, not the most impactfull, usefull or widely used, i have to go with those 3:
Horten Ho IX
[link]http://en.wikipedia.org/wiki/Horten_Ho_IX[/link]
Horten Ho XVIII
[link]http://en.wikipedia.org/wiki/Horten_H.XVIII[/link]
jet-powered stealth planes in 1945? sure, germany could do it. granted, the first never saw combat, the second never even reached the prototype stadium, but i am sure we are all very happy for that.
V2
[link]http://en.wikipedia.org/wiki/V2_rocket[/link]
the first man made object that reached space, which trough operation paperclip gave the US the means to develop even more advanced rockets, leading ultimately to the first man on the moon.
Horten Ho IX
[link]http://en.wikipedia.org/wiki/Horten_Ho_IX[/link]
Horten Ho XVIII
[link]http://en.wikipedia.org/wiki/Horten_H.XVIII[/link]
jet-powered stealth planes in 1945? sure, germany could do it. granted, the first never saw combat, the second never even reached the prototype stadium, but i am sure we are all very happy for that.
V2
[link]http://en.wikipedia.org/wiki/V2_rocket[/link]
the first man made object that reached space, which trough operation paperclip gave the US the means to develop even more advanced rockets, leading ultimately to the first man on the moon.