XyZspineZyX

10-12-2003, 10:34 AM

Hi folks!

I did some testing on gun performance of ShVAK, MG 151/20, UBS and Browning 0.50 cal in FB. My time is limited, therefore the following findings do not present a truth or something like that, however they are true and I did my best to find equal conditions for every test.

I had a look at:

ROF

muzzle velocity

dispersion

gun power

ROF test were extremely simple. I set unlimited ammo and pressed the trigger. I had the FB console count the rounds I fired within a minute. I?ll name the weapon, the plane I tested with and the rpm. In parenthesis ROF I found in the web. My numbers are quite accurate (I?d say no more than +/- 5), even though I find the numbers for the P-40 a little strange. Interestingly, there now is a difference for sync. There wasn?t in IL-2.

UBS (Yak-3): 900 rpm

UBK (Hurricane fieldmod): 950 rpm (1050)

Browning 0.50 (P-39 Q10): 650rpm

Browning 0.50 (P-40): 733 rpm

Browning 0.50 (P-47): 750 rpm (750)

ShVAK (Yak-3): 800 rpm (800)

ShVAK (La-7): 650 rpm

MG151/20 (109G-6): 720 rpm (740)

MG151/20 (190D-9): 690 rpm

Muzzle velocity:

Well, I didn?t actually measure muzzle velocity. Instead I measured the distance the covered within the first second after leaving the muzzle. These numbers are an approximation (That?s why I rounded to the nearest 50 meters). In parenthesis muzzle velocity in found in the web.

UBS/UBK: 750m (850m/s)

Browning 0.50: 700m (870ms)

ShVAK: 650m (800m/s)

MG 151/20: 550m (800m/s)

Dispersion:

I switched into arcade mode an attacked an smokestack. I set gun convergence to 200 meters and was 200 meters away from the smokestack. I fired a very short burst. The dots represent the hits.

http://mitglied.lycos.de/jaytdee/dispersion.jpg

Gun power:

I set up a small dogfight with me attacking a novice Yak-9u and had FB console count the hits until the Yak was history. I started right behind the enemy and therefore most of the hits came from 6 o?clock. I never fired from more than 200 meters distance, and basically 90% of the hits came from within 100 meters distance. Sometimes I was lucky, snapping of a wing almost instantly, sometimes I had to work hard. For every weapon I made 20 tries, so the average should be about average. The numbers are:

Weapon (number, plane): min hits---average hits---maximum hits

ShVAK (1, Yak.3): 4---16.0---30

MG151/20 (1, Bf 109G-6late): 4---11.6---19

UBS (2, Yak-3): 18---34.9---53

Browning 0.50 (2, P-39 Q-10): 6---30.7---52

I hope you find this helpful to some extend. If you don?t understand how my tests worked, just ask.

I did some testing on gun performance of ShVAK, MG 151/20, UBS and Browning 0.50 cal in FB. My time is limited, therefore the following findings do not present a truth or something like that, however they are true and I did my best to find equal conditions for every test.

I had a look at:

ROF

muzzle velocity

dispersion

gun power

ROF test were extremely simple. I set unlimited ammo and pressed the trigger. I had the FB console count the rounds I fired within a minute. I?ll name the weapon, the plane I tested with and the rpm. In parenthesis ROF I found in the web. My numbers are quite accurate (I?d say no more than +/- 5), even though I find the numbers for the P-40 a little strange. Interestingly, there now is a difference for sync. There wasn?t in IL-2.

UBS (Yak-3): 900 rpm

UBK (Hurricane fieldmod): 950 rpm (1050)

Browning 0.50 (P-39 Q10): 650rpm

Browning 0.50 (P-40): 733 rpm

Browning 0.50 (P-47): 750 rpm (750)

ShVAK (Yak-3): 800 rpm (800)

ShVAK (La-7): 650 rpm

MG151/20 (109G-6): 720 rpm (740)

MG151/20 (190D-9): 690 rpm

Muzzle velocity:

Well, I didn?t actually measure muzzle velocity. Instead I measured the distance the covered within the first second after leaving the muzzle. These numbers are an approximation (That?s why I rounded to the nearest 50 meters). In parenthesis muzzle velocity in found in the web.

UBS/UBK: 750m (850m/s)

Browning 0.50: 700m (870ms)

ShVAK: 650m (800m/s)

MG 151/20: 550m (800m/s)

Dispersion:

I switched into arcade mode an attacked an smokestack. I set gun convergence to 200 meters and was 200 meters away from the smokestack. I fired a very short burst. The dots represent the hits.

http://mitglied.lycos.de/jaytdee/dispersion.jpg

Gun power:

I set up a small dogfight with me attacking a novice Yak-9u and had FB console count the hits until the Yak was history. I started right behind the enemy and therefore most of the hits came from 6 o?clock. I never fired from more than 200 meters distance, and basically 90% of the hits came from within 100 meters distance. Sometimes I was lucky, snapping of a wing almost instantly, sometimes I had to work hard. For every weapon I made 20 tries, so the average should be about average. The numbers are:

Weapon (number, plane): min hits---average hits---maximum hits

ShVAK (1, Yak.3): 4---16.0---30

MG151/20 (1, Bf 109G-6late): 4---11.6---19

UBS (2, Yak-3): 18---34.9---53

Browning 0.50 (2, P-39 Q-10): 6---30.7---52

I hope you find this helpful to some extend. If you don?t understand how my tests worked, just ask.