@randomusername @Jengstrom thank you very much guys, now I'll be able to build a medium bomber out of that cockpit sub assembly I have built more than two years ago

@atgxtg Absolutely! Not to mention it's the most direct way to improve almost every aspect of performance. When Ed Heinemann was designing the AD-1 Skyraider he discovered that:

"every 100 lb (45 kg) of weight reduction the take-off run was decreased by 8 feet (2.4 m), the combat radius increased by 22 miles (35 km) and the rate-of-climb increased by 18 feet/min (0.091 m/s)."

His team managed to cut almost two tons of "unnecessary equipment." That was probably the best designed ground attack platform ever built.

@F104Deathtrap Don't forget the mass production factor. Smaller aircraft need less materials to build, so you can make more of them.

@randomusername And thus, you begin to see the drawbacks of equipment designed to inexpensively kill, not safely or comfortably transport humans.

https://b-25history.org/history/b25.htm says outside width of 56.5 inches