Kwiatos

11-23-2004, 05:30 AM

Hi!

I interesting how real performance had P-39 D. In game expecially version P-39 D-2 has very good climb rate and not bad speed. Recenlty i flew Fw 190 D-9 (1944 year) and was attacked by P-39 D-2 (from 1941 year). I dont turn with him and try escape in level fligh. I was flying about a few minutes at full powet (with Bost) and when i check six Cobra still was ab 700m behind me. In cobra was my friend and we was at comm. He said that he is able to keep distance 700 m behind me. We was about 3-4km alt. Then i started to climb and for my wonder P-39 start to catch im in climb??? Is everything ok with these bird?

I tried myself P-39 D-2 and must say it have very good climb rate and not bad speed.

As i found for P39 D-1 version:

Specification of Bell P-39D Airacobra:

Engine: One 1150 hp Allison V-1710-35 twelve-cylinder liquid cooled engine. Performance: Maximum speed 309 mph at sea level, 335 mph at 5000 feet, 355 mph at 10,000 feet, 368 mph at 12,000 feet, and 360 mph at 15,000 feet. An altitude of 5000 feet could be reached in 1.9 minutes. It took 5.7 minutes to reach an altitude of 15,000 feet and 9.1 minutes to reach 20,000 feet. Service ceiling was 32,100 feet. Maximum range (clean) was 600 miles at 10,000 feet at 231 mph. Range with one 145.7 Imp gal drop tank was 1100 miles at 196 mph. Weights: 5462 pounds empty, 7500 pounds gross, and 8200 pounds maximum takeoff. Dimensions: Wingspan 34 feet 0 inches, length 30 feet 2 inches, height 11 feet 10 inches, and wing area 213 square feet. Armament: One 37-mm cannon in the nose with 30 rounds. Four wing-mounted 0.30-inch machine guns with 1000 rpg, two fuselage-mounted 0.50-inch machine guns with 200 rounds per gun. One 250 lb, 325-lb, or 500-lb bomb could be carried underneath the fuselage"

http://home.att.net/~jbaugher1/p39_4.html

Other problem what i found is that performance of P-39 should drop very noticeable above 15000ft. But in FB/PF these is not true - P-39 keep its performance like belove these alt.

I cant find performance for P-39 D-2 maby someone have it?

I interesting how real performance had P-39 D. In game expecially version P-39 D-2 has very good climb rate and not bad speed. Recenlty i flew Fw 190 D-9 (1944 year) and was attacked by P-39 D-2 (from 1941 year). I dont turn with him and try escape in level fligh. I was flying about a few minutes at full powet (with Bost) and when i check six Cobra still was ab 700m behind me. In cobra was my friend and we was at comm. He said that he is able to keep distance 700 m behind me. We was about 3-4km alt. Then i started to climb and for my wonder P-39 start to catch im in climb??? Is everything ok with these bird?

I tried myself P-39 D-2 and must say it have very good climb rate and not bad speed.

As i found for P39 D-1 version:

Specification of Bell P-39D Airacobra:

Engine: One 1150 hp Allison V-1710-35 twelve-cylinder liquid cooled engine. Performance: Maximum speed 309 mph at sea level, 335 mph at 5000 feet, 355 mph at 10,000 feet, 368 mph at 12,000 feet, and 360 mph at 15,000 feet. An altitude of 5000 feet could be reached in 1.9 minutes. It took 5.7 minutes to reach an altitude of 15,000 feet and 9.1 minutes to reach 20,000 feet. Service ceiling was 32,100 feet. Maximum range (clean) was 600 miles at 10,000 feet at 231 mph. Range with one 145.7 Imp gal drop tank was 1100 miles at 196 mph. Weights: 5462 pounds empty, 7500 pounds gross, and 8200 pounds maximum takeoff. Dimensions: Wingspan 34 feet 0 inches, length 30 feet 2 inches, height 11 feet 10 inches, and wing area 213 square feet. Armament: One 37-mm cannon in the nose with 30 rounds. Four wing-mounted 0.30-inch machine guns with 1000 rpg, two fuselage-mounted 0.50-inch machine guns with 200 rounds per gun. One 250 lb, 325-lb, or 500-lb bomb could be carried underneath the fuselage"

http://home.att.net/~jbaugher1/p39_4.html

Other problem what i found is that performance of P-39 should drop very noticeable above 15000ft. But in FB/PF these is not true - P-39 keep its performance like belove these alt.

I cant find performance for P-39 D-2 maby someone have it?