about the BoB's Bf110 20mm Canons
 

the 20mm canons of the Bf110C-4, C-7, D-0/B were drum fed. For each canon 3 drums with 60round each were available. The reload/change of the drums was the job of the reargunner, and sure was npt able to man his MG15 in that time ;)

will that be programmed in any kind or will the SoW 110s "just" have a 180shell drum ?

Good question ;)

Very interesting, how did the reargunner do this? Was there some kind of hatch in the floor where he could reach the cannons?

i look at home, but i find only a Bf 110 G-2 Book (Schußwaffenanlage) see self:

http://www5.pic-upload.de/thumb/13.1...v7nmfej77j.jpg http://www5.pic-upload.de/thumb/13.1...tyt1lpurmo.jpg http://www5.pic-upload.de/thumb/13.1...pdvpayd1yd.jpg http://www5.pic-upload.de/thumb/13.1...izci2ig8f2.jpg

Very nice read, but nothing is written about the reargunner rearming.

Would be interesting to see if they keep it the same as it is in IL2 1946, perhaps a pause between reloads to let you know how much ammos left ?




The reloading was done by rear gunner he moved to radio seat where 20mm drums were stored to the side and the breaches below.

http://img.photobucket.com/albums/v1...B-Cpitarea.jpg

Yes, because the Bf110G-2 used the MG151/20 with belt and not the MG/FFM with the drum like the earlier Bf110 ;)

The situation was exactly the same in the early Beaufighters too. I do wonder how the reloading will be done on these two aircraft.

imagine the wonderful noise, heat and smell of cordite in there :cool:

Imagine doing that while performing high g manoeuvring!
If I’m not mistaken, the same system was employed on early Ju88 night fighters.

If you think hard enough you'll smell it too! Lovely:grin:

Just a side-question, I didn't know the barrels of the 110's cannons were that long , the bullet must have had a higher velocity than lets say a 109's nose cannon, is that modelled in IL2, if not, I hope that will be modelled in SoWBoB, that is if my theory is right;)

Sven

I'm pulling this from memory so I could be wrong (I'm sure someone will let us know!)...

I think the 20mm in the 110 was the same as the ones fitted to 109's. ie. the MGFF. At least till 1941, where they switched them over to the MG151 20mm.

the barrels of the MG-FF/M ended long before the holes in the nose, they ended ~ below the pilot seat ! the shells had to "fly" through over-caliber tubes.

this was also the case with nose fitted Mg151 and MK108 in the later 109 series !
the barrels for sure not ended in the spinner hole :D

and yes, the Bf110C,D,E,F had the same canons as the Bf109E.
C-1,-2 had MG-FF, from C-3 on MG-FF/M. Exception was the C-6 with a MK101 30mm instead of the two 20mm...........
From 110G the 20mm were MG151/20 belt fed.

and true about the Beaufighter Mk.I , but it will be not flyable, only AI, in the first release AFAIK :(

The barrel wasn't any longer, it was an ordinary MG-FF. Just like the barrel of the MK108 on the Bf 109 didn't extend all the way from the cannon to the end of the spinner, it was much shorter. Blast tube of 5cm radius was installed from the end of the cannon barrel through the engine and through the spinner. The case was the same on the Bf 110.

EDIT: Franky beat me to it :)

That means, if you fired at high g, you could hit the inside of the blast tubes! I wonder whether any aircraft were damaged or lost that way?

i think they saved the heavy guns for acccurate shooting, for high g deflection shooting the 4 mg17 should been enough

Will bombers be able to reload in flight period in SoW? Its kinda annoying now to be flying in a bomber, run out of ammo, look around, see Ammo boxes sitting around and cant use them. Im sure crews went up with extra ammo right?

IIRC we already saw a Moskau Show video where the the drumchange of a Ju87s MG15 was animated :)

That's impossible because the g value for something like this to occur is far too high.

This is what I love about this forum, one can ask almost any question like this and it always gets answered!

About the shells hitting the tube walls, isn't that pretty easily calculated? I could do the math, but, as always, there is always someone who have thought about this before :)
There you go, post no 8:

http://warbirdsforum.com/showthread.php?t=1420

but like always with physics, it's always more complicated than this... But theoretically, you'd need to pull about 80 G to make it hit the wall.

By the way, if in any post or discussion related to guns, especially aircraft guns you see the name "Tony Williams", he knows pretty much everything about the subject.

Thanks very much for posting that.

Also the angle of incidence that the round would stike at would be extremely small causing it to ricochet down the tube.

How did the German rounds arm themselves? Was there a delay or did it occur as soon as the propellant charge went off?

Cheers

BoB era German cannon rounds had no delay on the fuse so would explode on impact. They introduced delayed fuses in '41.

I believe you misunderstood, winnie.
The fuses were save until a certain time after firing the round,
So if there was something in the way in the first few yards of flight the round wouldn't explode.
The MG FF used the "Bodenzünder (Bd.Z.) 1511, 1512 and 1513.
http://www.munitionssammler.com/foru...e6960d46178961
Funktion: Centrifugal arming using steel balls that move outward. When air resistance slows down projectile spin, balls move back toward center
and cause a spring to force firing pin into detonator for self-destruct

You're right, I should have said fast acting fuse.. (original M-Geschoss, the delayed fuse was fitted '41)

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http://users.teledisnet.be/web/mfe39146/009b.jpg


http://users.teledisnet.be/web/mfe39146/MGFF0.jpg


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If you look carefully, ammo drums are dissapearing one by one as you shoot. When you run out of ammo, there are no more spare drums around in your gunner position!

There is a chance though that the drums you saw belonged to another gunner, you can see spare drums of waist gunners from the ventral gunner hatch in He-111 for example.