RAF74_Buzzsaw

11-07-2004, 02:34 PM

Hello Oleg

Thankyou and Luthier for all your hard work on PACIFIC FIGHTERS. It is a worthy addition to the IL-2 series.

There seems to be a bug with the Corsair however:

I noticed that it seems to perform very well so I did some tests.

The tests showed it is exceeding the historical climbrate.

Here is a U.S. Documents which show the Climbrate and other performance figures for the F4U-1D:

http://web.cetlink.net/~howardds/27328170.gif

You can see the climbrate at Sea Level with Combat power is 3370 Feet per Minute. The climb time to 10,000 ft, (3048 meters) is 3.3 minutes or 3 minutes 18 seconds. The climb time to 20,000 ft, (6096 meters) is 7.1 minutes or 7 minutes, 6 seconds.

My tests started with a fully loaded, (100% fuel, default load) Corsair F4U-1D at Sea level. Starting speed was 300 kph. I climbed at approximately 280 kph, 270kph over 10,000 ft. I changed to Supercharger stage 2 at 10,000 ft.

My climb times were:

1 minute 4 seconds sea level to 5,000 ft (1524 meters) That is an average climbrate of 4687 Feet per Minute between sea level and 5,000 ft.

2 minutes 35 seconds sea level to 10,000 ft (3048 meters). That is an average climbrate of 3871 feet per minute between sea level and 10,000 ft.

5 minutes 41 seconds sea level to 20,000 ft (6096 meters) That is an average climbrate of 3519 feet per minute between sea level and 20,000 ft.

The performance tests show that the F4U-1D definitely exceeds its historical limits.

I am wondering if there could be a problem and perhaps the programmer used the climb peformance figures from the later model F4U-4? The test results are almost exactly what a F4U-4 might have achieved.

I tested the sea level speed of the F4U-1D and got 366 kph or 354 mph, which is only slightly less than what the historical speed should be, so that is not a problem.

I also tested the stall speed of the F4U-1D and got exactly the correct figure. (87.5 mph or 140 kph for no power stall) So the wing lift seems to be very well modelled.

I have not yet done tests for the earlier model Corsair F4U-1 and F4U-1A.

Once again thankyou for your hard work and I am looking forward to the patch and the addons.

I can mail you the test records if you require them.

Thankyou and Luthier for all your hard work on PACIFIC FIGHTERS. It is a worthy addition to the IL-2 series.

There seems to be a bug with the Corsair however:

I noticed that it seems to perform very well so I did some tests.

The tests showed it is exceeding the historical climbrate.

Here is a U.S. Documents which show the Climbrate and other performance figures for the F4U-1D:

http://web.cetlink.net/~howardds/27328170.gif

You can see the climbrate at Sea Level with Combat power is 3370 Feet per Minute. The climb time to 10,000 ft, (3048 meters) is 3.3 minutes or 3 minutes 18 seconds. The climb time to 20,000 ft, (6096 meters) is 7.1 minutes or 7 minutes, 6 seconds.

My tests started with a fully loaded, (100% fuel, default load) Corsair F4U-1D at Sea level. Starting speed was 300 kph. I climbed at approximately 280 kph, 270kph over 10,000 ft. I changed to Supercharger stage 2 at 10,000 ft.

My climb times were:

1 minute 4 seconds sea level to 5,000 ft (1524 meters) That is an average climbrate of 4687 Feet per Minute between sea level and 5,000 ft.

2 minutes 35 seconds sea level to 10,000 ft (3048 meters). That is an average climbrate of 3871 feet per minute between sea level and 10,000 ft.

5 minutes 41 seconds sea level to 20,000 ft (6096 meters) That is an average climbrate of 3519 feet per minute between sea level and 20,000 ft.

The performance tests show that the F4U-1D definitely exceeds its historical limits.

I am wondering if there could be a problem and perhaps the programmer used the climb peformance figures from the later model F4U-4? The test results are almost exactly what a F4U-4 might have achieved.

I tested the sea level speed of the F4U-1D and got 366 kph or 354 mph, which is only slightly less than what the historical speed should be, so that is not a problem.

I also tested the stall speed of the F4U-1D and got exactly the correct figure. (87.5 mph or 140 kph for no power stall) So the wing lift seems to be very well modelled.

I have not yet done tests for the earlier model Corsair F4U-1 and F4U-1A.

Once again thankyou for your hard work and I am looking forward to the patch and the addons.

I can mail you the test records if you require them.