a 4-engined big carrier-plane will have the fuel for take-off, climbing and half-range, than the little part will be released for the rest of the way
The P-51Bv is also cool. Maybe a second engine in pusher configuration behind the pilot?
yes indeed, and both bv and bv2 are quite buildable
The future was well written by innovative prototypes: see the XC-138 Packning (following XC-120 Packplane
Somewhere I have also "Macchine bizzare nella storia del' aviazione", but the probability to find it soon is low.