"..similar proposals were schemed in germany"
About the manned V2 with this fancy cockpit, hm, don't really believe in it,
but maybe ...
But the A4 was developed from 1939 on, with its first flight in 1942, so I really
think, there were other thoughts and sorrows, than to bring a man into space
and its hard to imagine, which military task could be fulfilled with such a manned
capsule. And when Germany was able to develop rockets again, they probably
weren't based on the A4 any more, I think.