Shortround6
Major General
A lot is written about the Spitfires "weakness" of short range/endurance. However the vast majority of single engine fighters used in WW II didn't have any real range/endurance advantage over the Spitfire. Or if they did they had one or two other major failings like little or no protection and/or much less fire power.
The Mustang, due to it's advanced aerodynamics, was in a class of it's own among planes built in large numbers. And it didn't become the "escort" fighter it is known for until the two stage Merlin was fitted. This was needed not only for the power to give performance at the high weight (compared to European fighters) but the extra weight of the engine and bigger prop compared to the Allison versions allowed the rear fuselage tank to be fitted and flown without degrading the flying characteristics to too great a degree.
It took about 103 weeks (2 years) from the first flight of the NA-73X and the first flight of a Merlin powered prototype so any idea that the Mustang was designed as an "escort" fighter is ludicrous. Yes, it carried more fuel than most other V-12 powered machines but 150 imp gallons of internal fuel was nowhere near enough. Using the wing tanks only the P-51 was rated at around 150-200 miles combat radius depending on altitude and exact mission profile. This is more than many other single fighters could manage but obviously nowhere near what was needed for escorting bombers into Germany.
The Mustang, due to it's advanced aerodynamics, was in a class of it's own among planes built in large numbers. And it didn't become the "escort" fighter it is known for until the two stage Merlin was fitted. This was needed not only for the power to give performance at the high weight (compared to European fighters) but the extra weight of the engine and bigger prop compared to the Allison versions allowed the rear fuselage tank to be fitted and flown without degrading the flying characteristics to too great a degree.
It took about 103 weeks (2 years) from the first flight of the NA-73X and the first flight of a Merlin powered prototype so any idea that the Mustang was designed as an "escort" fighter is ludicrous. Yes, it carried more fuel than most other V-12 powered machines but 150 imp gallons of internal fuel was nowhere near enough. Using the wing tanks only the P-51 was rated at around 150-200 miles combat radius depending on altitude and exact mission profile. This is more than many other single fighters could manage but obviously nowhere near what was needed for escorting bombers into Germany.