Bofor Gun info.

[Skoshi Tiger]

I've been having a bit of a look for Bofors Gun information and although there is a lot of general information the specifics are a bit hard to find.

So far I can only find references to a contact fuse for the Bofors gun. Did they have timed fuses and how did the fuse setting work? I expect it would be a bit of a job fusing up to 120 rounds per minute

I did find a hand book for the US Naval twin mount, but that has very little in common with the versions we are going to see.

http://www.scribd.com/doc/34427598/BR1919-Handbook-for-40mm-Bofors-Twin-R-P-50-Mark-5-Mounting-UK-1950

Has anyone got links to Bofors info?

Cheers!

[BadAim]

So far as I know the Bofors (and the German 37, which is really the same gun) had only a contact fuse, with a timer so that the shell would explode at the end of it's range. I'll see what I can find.

[5./JG27.Farber]

I was wondering about this a couple of weeks ago, as the rounds currently in game explode near the aircraft regardless of range. It would be good to find this out and make sure the game is accurate.

I wouldn't be suprised if there was some simple mechanism or electrical device which could change the fuse timing. Im always suprised by the technology of the 1940's.

[salmo]

For what it's worth. In-game, the 40mm Bofors MkI gun has the following specs:

RateOfFire: 60 rounds per minute
ActiveRange: 15 m to 4000 m
Clip: 8 rounds
ReloadTime: 1 sec
Reserve: 1000 rounds

With two round types:

Type: MkI
Mass: 0.88 kg
Projectile spec: ArmorPiercing 0.4 kg / Concussion 0.05 kg of TNT
MuzzleVelocity: 875 ms
Fuse type: Contact
Projectile lifeSpan: 20 sec

Type: MkIIIT
Mass: 0.93 kg
Projectile spec: HighExplosive 0.5 kg / Fragmentation 0.067 kg of TNT
MuzzleVelocity: 875 ms
Fuse type: Timeout
Projectile lifeSpan: 20 sec

I'm thinking the amounts of exposive & other parameters might be modeled for in-game effects/results and might not necessarily reflect RL values.

[KG26_Alpha]

http://www.quarry.nildram.co.uk/Bofors.htm


Hmmmm.........

http://www.quarry.nildram.co.uk/Bofors57%20mm%20m47.jpg

[335th_GRAthos]

For what it's worth. In-game, the 40mm Bofors MkI gun has the following specs:

RateOfFire: 60 rounds per minute
ActiveRange: 15 m to 4000 m
Clip: 8 rounds
ReloadTime: 1 sec
Reserve: 1000 rounds

With two round types:

Type: MkI
Mass: 0.88 kg
Projectile spec: ArmorPiercing 0.4 kg / Concussion 0.05 kg of TNT
MuzzleVelocity: 875 ms
Fuse type: Contact
Projectile lifeSpan: 20 sec

Type: MkIIIT
Mass: 0.93 kg
Projectile spec: HighExplosive 0.5 kg / Fragmentation 0.067 kg of TNT
MuzzleVelocity: 875 ms
Fuse type: Timeout
Projectile lifeSpan: 20 sec

Awesome!

Hold on a moment... only two types of ammo!
Oh Jesus, what a whining this will be.... ROFL! :D


~S~

[Skoshi Tiger]

If this doesn't get them looking forward to the Bofors Gun then nothing will! :)

http://www.youtube.com/watch?v=roYQwSqKcO8&feature=related

I wan't the co axial Bren Gun on mine please!


Cheers!

[BadAim]

LOL! Damn the naysayers! Full speed ahead with AAA!

[5./JG27.Farber]

For what it's worth. In-game, the 40mm Bofors MkI gun has the following specs:

RateOfFire: 60 rounds per minute
ActiveRange: 15 m to 4000 m
Clip: 8 rounds
ReloadTime: 1 sec
Reserve: 1000 rounds

With two round types:

Type: MkI
Mass: 0.88 kg
Projectile spec: ArmorPiercing 0.4 kg / Concussion 0.05 kg of TNT
MuzzleVelocity: 875 ms
Fuse type: Contact
Projectile lifeSpan: 20 sec

Type: MkIIIT
Mass: 0.93 kg
Projectile spec: HighExplosive 0.5 kg / Fragmentation 0.067 kg of TNT
MuzzleVelocity: 875 ms
Fuse type: Timeout
Projectile lifeSpan: 20 sec

I'm thinking the amounts of exposive & other parameters might be modeled for in-game effects/results and might not necessarily reflect RL values.

So basically this value should be Contact and or 20 secs.... Then it would be realistic. So I suppose now someone needs to report it was a bug/unrealistic, unless someone comes along with any other evidence.

[pupo162]

So basically this value should be Contact and or 20 secs.... Then it would be realistic. So I suppose now someone needs to report it was a bug/unrealistic, unless someone comes along with any other evidence.

i believe the line "Projectile lifeSpan: 20 sec" is the time after wish the game ignores and stops processing each bullet. i believe its a factor common to every single bullet in the game, evne those who are nto explosive. (LMG)

[Kongo-Otto]

So far as I know the Bofors (and the German 37, which is really the same gun) had only a contact fuse, with a timer so that the shell would explode at the end of it's range. I'll see what I can find.

The German Bofors Version was called 4 cm Flak 28, the 3,7 cm Flak 37 is a different design. ;)
The German Wehrmacht also used a great amount of captured Russian, Polish, British, Norvegian and French 40mm Bofors which were then called 4 cm Flak(r) (r= russisch/ russian) or 4 cm Flak (n) (n= norwegisch/norvegian) etc.
The German 4 cm Bofors and the captured 40mm Bofors guns were mostly used in Norway, Denmark and France for Harbor and Airfield defence and very rarely mounted on vehicles.
Also most of this guns were used by Kriegsmarine and Luftwaffe units, few of these guns were also mounted on ships.

German 4 cm Flak 28:
http://www.lonesentry.com/ordnance/wp-content/uploads/2010/07/bofors-flak-gun.jpg

British Q.F. 40mm Mk I Bofors:
http://farm3.static.flickr.com/2277/1672404485_c06f1574ac.jpg

[335th_GRAthos]

For the German side I expect to command this! ;)

20mm Flakvierling 38
http://www.stinch.com/militaria/images/k98_pouch/foto/bild/1943/101I-303-0586-25.jpg

~S~

[winny]

I think BadAim is right. My grandfather was a bofors AA gunner during WW2 so I've got some books etc on the subject, found this in one of them.

The Bofors used a standard high-explosive shell with a sensitive point-detonating fuze designed to burst upon impact.* If the shell did not make contact with a target, the fuze destroyed the projectile at the tracer burnout range of approximately 3,500 yards.

I have no idea how reliable this is but it seems to make sense.

[Viking]

That's about correct as I can remember. I served on the Swedish motortorped boats 70- 71 and we used to bang away a lot on that gun the 40 mm lvakan m/36 since there was a lot of ammo in store since the war. Was like sitting in some machine that banged away at a slow pace and the projectile would only explode on impact and self-destruct at a far distance. You could see the detonations but no sound.

Viking

[salmo]

So basically this value should be Contact and or 20 secs.... Then it would be realistic. So I suppose now someone needs to report it was a bug/unrealistic, unless someone comes along with any other evidence.
You have to remember that timeout fusing is an in-game name given by the programmers, and may not necesarily code only for shell exploding after timeout is reached. For all I know, the code for fuse: timeout may already included timout and contact.

[Oldschool61]

AA in WW2 used a proximity sensor that used radio waves that would bounce off aircraft and when the sensor detected the signal it would explode.

[WTE_Galway]

AA in WW2 used a proximity sensor that used radio waves that would bounce off aircraft and when the sensor detected the signal it would explode.

Not in the Battle of the Britain they didn't. That is about 3 years too early.

Proximity fuses did not show up in the ETO until the Battle of the Bulge.

[Cornerspeed]

I've been having a bit of a look for Bofors Gun information and although there is a lot of general information the specifics are a bit hard to find.

So far I can only find references to a contact fuse for the Bofors gun. Did they have timed fuses and how did the fuse setting work? I expect it would be a bit of a job fusing up to 120 rounds per minute

I did find a hand book for the US Naval twin mount, but that has very little in common with the versions we are going to see.

http://www.scribd.com/doc/34427598/BR1919-Handbook-for-40mm-Bofors-Twin-R-P-50-Mark-5-Mounting-UK-1950

Has anyone got links to Bofors info?

Cheers!

http://en.wikipedia.org/wiki/Bofors_40_mm

[Kongo-Otto]

Maybe this of interest for you:

40-mm Automatic Gun M1 (AA) and 40-mm Antiaircraft Gun Carriages M2 and M2A1, TM 9-252, 1944 (http://www.hnsa.org/doc/boforstm252/index.htm)