What ifs that were reality

[tigercat]

1) Biplane Hurricane

There were a number of odd one-off Hurricane experiments. One of the more interesting was the "biplane" Hurricane, which featured a jettisonable top wing with integral fuel tanks to reduce take-off distance with heavy loads, and to improve ferry range. The wing required the relocation of the radio mast to the belly of the aircraft. The modification was implemented by F. Hills & Sons and was designated the "Hillson FH.40". It proved too heavy to be serviceable.

http://www.faqs.org/docs/air/avhurr.html

2 )Flying  Liberatress

http://www.unrealaircraft.com/hybrid/B17G.php