posted 08-31- 06:10 PM
From 'Aircraft of World War II'- (1999) PRC Publishing Ltd.P39Q.
Length: 30ft 2in (9.2m)
Height: 11ft 10in (3.63m)
Wingspan: 34ft (10.37m)
Weight empty: 5,600lb (2,540kg)
Range: 675 miles (1.086km)
Max Speed: 380 mph (612 km/h)
Service Ceiling: 35,000ft (10,670m)
Engine: 1,200hp Allison V-1710-85
Armanent:
1x 37mm nose cannon - 30 rds
2x .50in fuselage guns - ? rds (enclosed within the nose contours)
(up to)4x .30in wing guns - ? rds
500lb bomb on centreline rack
Not much there on qty of rds .... I'll see what else I can turn up. Also no indication of .50 guns in the wing pods ....
Correction.... 
From .. http://www.nasm.edu/nasm/aero/aircraft/bellp39q.htm
'The final production variant of the Airacobra was the P-39Q. The most important difference was the replacement of the .30 cal. wing guns with a .50 cal. in a pod under each wing giving the aircraft a total of four .50 cal. guns.' 
More to follow .....
Getting closer now....
From: http://www.bryant.edu/~history/h364proj/fall_98/martin/p39.html
Armament: 2 - 50 cal machine guns (nose) with 200 rpg
2 - 50 cal machine guns (1/wing) with 300 rpg
1 - 37mm cannon (nose) with 30 rounds
Cheers,
AGAS 5
[This message has been edited by AGAS - 5 (edited 08-31-2000).]
[This message has been edited by AGAS - 5 (edited 08-31-2000).]