Author Topic: Guns dispersions (Read 291 times)

GODO · « **on:** September 30, 2004, 02:56:26 PM »

The purpose of this thread is to post known real gun dispersion and the mounting where these dispersion apply. Or any other uselful info that can help Pyro to set the correct dispersion of current guns.

Pyro · « **Reply #1 on:** September 30, 2004, 03:24:55 PM »

Somebody has recently scanned some from the book Gunner on the B-17 and B-24. I can't find the scans but here's the info they cite. No details about how the patterns were measured.

B-17 - Not sure if the tail stinger refers to radio position or pre-cheyenne tail.

Units in mils

8.3 - Ball
11.7 - Sperry upper
12.6 - Bendix chin
14.3 - K6 mount waist guns w/ enclosed window
18.7 - Cheek guns
25 - Tail turret
33.4 - Tail stinger

B-24

8.3 - Ball
11.2 - Martin upper
12.9 - Emerson Nose
12.9 - K6 mount waist guns w/ closed windows
19.3 - Motor Products tail
19.3 - Motor Products nose
35.6 - Waist w/ open windows

Wotan · « **Reply #2 on:** September 30, 2004, 03:28:55 PM »

That was me

Here they are again

Urchin · « **Reply #3 on:** September 30, 2004, 05:26:05 PM »

As far as I know, the "tail stinger" was the old pre-cheyenne twin-.50s. At least that is how I've seen them refered to in reference to B-17F's.

TimRas · « **Reply #4 on:** October 02, 2004, 02:40:52 AM »

Just to recap the numbers from the other threads:

From HoHun:

Fuselage mounting:
MG FF/M - 1.0 mil
MK108 - 1.5 mil
MG151/20 - 1.9 mil
MK103 - 2.0 mil

Wing mounting:
MG 151/20 - 5 mil
US 12.7mm M2 - 6 mil

Turrets:
B-17 Ball 8.3 mil
Manual tail - 25 mils

From butch2k:
12.7mm M2 on a P-38 - 8 mil (100% dispersion)
12.7mm M2 on a P-38 - 4 mil (75% dispersion)
Hispano on a P-38 - 3mil (75% dispersion)
MG-FF - 1.2-1.3 mil (fuselage mounting)
MG151/15- 3-3.5 mil (fuselage mounting)
MG17 - 6-7 mil (cowling mounting)

From Tony Williams:
.303 Browning in the wings of the Hurricane and Spitfire
10mil (100%)
5mil (75%)

12.7mm M2- 5 mil (wing mounting ?)