Kwiatos

03-09-2004, 05:50 AM

Hi!

In my opinion A6M in Fb have some bugs:

a)critical dive speed

- A6M2 in Fb 700km/h - should be 350 mph

- A6M5a in Fb 700 km/h - should be 460 mph

b) Super charger in A6M2 - in Fb 2 stages - should be 1 stage

Some info about Zero:

The first production version of the Zero was the A6M2 Model 11, of 1940. This had a Nakajima Sakae 12 engine, a 14-cylinder air cooled radial that developed 950 hp. at 13,800 ft. The A6M2 had a top speed of 316 m.p.h. at 16,400 ft., and a range of 1,265 miles on internal fuel. With an under fuselage drop tank, the range was extended to 1,930 miles. The standard armament was 2-7.7mm MG in the engine cowling, and 2-20mm cannon in the wings. Wingspan was 39 ft. 5 in.

The similar Model 21 had folding wing tips for aircraft carrier use. This was the model on board the Japanese carriers at the beginning of the Pacific War on December 7, 1941.

Japanese pilots were trained to engage enemies in slow speed dogfights. Above 275 mph the Zero's excellent handling diminished, making tight high speed turns nearly impossible. The Zero's maximum safe dive speed was 350 mph. Above that speed the fighter lost the ability to roll and the skin on the wings would begin to wrinkle. It the pilot pushed harder the Zero might shed its wings.

The next main version of the Zero was the A6M3, which appeared late in 1942. This version was powered by an up rated 1,130 hp. Sakae 21 radial engine, with a two stage supercharger that improved high altitude performance. Top speed was increased to 336 m.p.h. at 19,865 ft. Best climb rate was 4,500 ft./min. Armament and range remained about the same.

The A6M3 Model 32 had clipped wing tips, achieved by removing the folding wing tips of the carrier model. This was intended to improve the roll rate, which was inferior to that of American fighters. This model also had reduced internal fuel capacity (down to 134 gal. from the 156 gal. capacity of the A6M3 Model 22). The Zero was beginning to show its age, and its performance was being eclipsed by the latest Allied fighters.

The reduced wing span (36 ft. 2 in.) of the Model 32 was carried over to the next model, the A6M5 of 1943. This model had the improved Sakai 31 engine with ejector exhaust stacks to augment thrust, the reduced wing span of the Model 32 (but with the familiar rounded shape of earlier Zeros), plus heavier wing skin. On most airplanes, the 7.7mm wing MG were replaced by 12.7 mm MG. Speed was now up to 358 m.p.h., and dive limit speed to 410 m.p.h. Best climb rate was 3,340 ft./min. The A6M5a had an improved wing cannon, and carried more ammunition, and the dive limiting speed was raised to 460 m.p.h. These models still lacked any protection for the pilot, or even an emergency release for the canopy.

So what we have:

1. Max safe dive speed:

A6M2 - 350 mph (565km/h)

A6M5 - 410 mph (660 km/h)

A6M5a - 460 mph (740 km/h)

2. Supercharger

From model A6M3 with Sakae 21 radial engine, Zero had two stage supercharger that improved high altitude performance. So A6M2 shouldn't have 2 stage supercharger.

In my opinion A6M in Fb have some bugs:

a)critical dive speed

- A6M2 in Fb 700km/h - should be 350 mph

- A6M5a in Fb 700 km/h - should be 460 mph

b) Super charger in A6M2 - in Fb 2 stages - should be 1 stage

Some info about Zero:

The first production version of the Zero was the A6M2 Model 11, of 1940. This had a Nakajima Sakae 12 engine, a 14-cylinder air cooled radial that developed 950 hp. at 13,800 ft. The A6M2 had a top speed of 316 m.p.h. at 16,400 ft., and a range of 1,265 miles on internal fuel. With an under fuselage drop tank, the range was extended to 1,930 miles. The standard armament was 2-7.7mm MG in the engine cowling, and 2-20mm cannon in the wings. Wingspan was 39 ft. 5 in.

The similar Model 21 had folding wing tips for aircraft carrier use. This was the model on board the Japanese carriers at the beginning of the Pacific War on December 7, 1941.

Japanese pilots were trained to engage enemies in slow speed dogfights. Above 275 mph the Zero's excellent handling diminished, making tight high speed turns nearly impossible. The Zero's maximum safe dive speed was 350 mph. Above that speed the fighter lost the ability to roll and the skin on the wings would begin to wrinkle. It the pilot pushed harder the Zero might shed its wings.

The next main version of the Zero was the A6M3, which appeared late in 1942. This version was powered by an up rated 1,130 hp. Sakae 21 radial engine, with a two stage supercharger that improved high altitude performance. Top speed was increased to 336 m.p.h. at 19,865 ft. Best climb rate was 4,500 ft./min. Armament and range remained about the same.

The A6M3 Model 32 had clipped wing tips, achieved by removing the folding wing tips of the carrier model. This was intended to improve the roll rate, which was inferior to that of American fighters. This model also had reduced internal fuel capacity (down to 134 gal. from the 156 gal. capacity of the A6M3 Model 22). The Zero was beginning to show its age, and its performance was being eclipsed by the latest Allied fighters.

The reduced wing span (36 ft. 2 in.) of the Model 32 was carried over to the next model, the A6M5 of 1943. This model had the improved Sakai 31 engine with ejector exhaust stacks to augment thrust, the reduced wing span of the Model 32 (but with the familiar rounded shape of earlier Zeros), plus heavier wing skin. On most airplanes, the 7.7mm wing MG were replaced by 12.7 mm MG. Speed was now up to 358 m.p.h., and dive limit speed to 410 m.p.h. Best climb rate was 3,340 ft./min. The A6M5a had an improved wing cannon, and carried more ammunition, and the dive limiting speed was raised to 460 m.p.h. These models still lacked any protection for the pilot, or even an emergency release for the canopy.

So what we have:

1. Max safe dive speed:

A6M2 - 350 mph (565km/h)

A6M5 - 410 mph (660 km/h)

A6M5a - 460 mph (740 km/h)

2. Supercharger

From model A6M3 with Sakae 21 radial engine, Zero had two stage supercharger that improved high altitude performance. So A6M2 shouldn't have 2 stage supercharger.