See also the XP-54...http://en.wikipedia.org/wiki/Vultee_XP-54
And the XP-56...http://en.wikipedia.org/wiki/Northrop_XP-56_Black_Bullet
A trio of experimental aircraft designs that the USAAF looked at as WW-II was ramping up.
Also the Fisher XP-75 while not an experimental, per se, aircraft could fall into this group as well.
http://en.wikipedia.org/wiki/Fisher_P-75_Eagle
Regards
alfa6 ;>}
Didn't know about that little XP-56. A 2K HP engine in that little airframe would have made it quite zippy.
Thanks.