According to Famous Fighters of The Second World War, North American P-51D was the first production model to actually to have "bubble canopy", which was also the most built variant of this airplane - nearly 8000 machines were built. This variant is also the most known version, although it was introduced as late as 1944. Famous Colonel "Chuck" Yaeger also flew "Mustang" during World War II.
Technical Information: North American P-51D Mustang
Dimensions:
Span: 37 ft. 0 in
Length: 32 ft. 3 in
Height: 13 ft. 8 in
Gross wing area: 233 sq. ft.
Armament:
Four or six 0.5 in. Browning MG 53-2 machine-guns with 270 or 400 rounds
Up to 1000 lb bombs underwing racks or ten 5 in. high velocity aircraft rockets.
Powerplant:
One Rolls-Royce/Packard Merlin V-1650-7 12 cylinder liquid-cooled vee engine with two-speed, two-stage supercharging, developing 1450 hp for take-off, and 1695 hp under war-emergency conditions at 10,300 ft.
Weights:
Empty: 7,635 lb
Combat: 10,100 lb
Maximum load: 11,600 lb.
Performance:
Maximum speed:
437 mph at 25,000 ft
413 mph at 15,000 ft
395 mph at 5,000 ft
Initial climb rate: 3,475 ft./min
Service ceiling: 40,000 ft.
Technical information from William Green's "Famous Fighters of the second world war", MacDonald & Co, 1957.