1957 hypersonic flat bottom missile

[flateric]

Found at NASA Glenn site

 

[Firefly 2]

The extreme sweep/ flat underside principle was known even then... wow.

 

[Wahubna]

The extreme sweep/ flat underside principle was known even then... wow.

And what is that principle?

 

[lastdingo]

* lifting body; lift by angle of attack
* low supersonic drag of high sweep


Later on, the Sänger II project used approx this approach as well.