RE: Can a full scale prop hang?
Thrust weight ratios > 1 for propeller aircraft became available in the fifties.
IMHO, the best example of this is the Lockheed XFV 1 experimental fighter pictured below.
I have always wondered what is was like to be a pilot of that aircraft, it must have been an awesome feeling to take off from a vertical postition lying on your back. I don't have a video, but would really like to see one.
/Red B.