3cm Flak 103/38

Discussions on the fortifications, artillery, & rockets used by the Axis forces.
User avatar
Manuferey
Member
Posts: 3894
Joined: 17 May 2007 14:52
Location: Virginia

Re: 3cm Flak 103/38

Post by Manuferey » 17 May 2015 21:47

Germany August 1945: a group of surrendered 3 cm Flak 103/38.

Image

Source: https://www.pinterest.com/pin/391391023841006692/

Emmanuel

jgoodden
New member
Posts: 1
Joined: 29 May 2015 12:01
Location: United Kingdom

Ile de Cezembre

Post by jgoodden » 29 May 2015 12:11

I am new to this site - but read Cobrahistorians piece about the Ile de Cezembre.
I have a 78rpm BBC recording made on 02/09/1944 about the bombardment of the island. It was made on HMS Malaya by my dad. Currently I am looking for a turntable that will play it.
I live in the E.Midlands.

Von Schadewald
Member
Posts: 1974
Joined: 16 Nov 2004 23:17
Location: Yugo

Re: 3cm Flak 103/38

Post by Von Schadewald » 30 May 2015 19:21

30mms as intended for the Kugelblitz & Type XXI submarines

Image

jopaerya
Member
Posts: 17832
Joined: 21 Jun 2004 13:21
Location: middelburg

Re: 3cm Flak 103/38

Post by jopaerya » 14 May 2016 20:56

Some aircraft pictures of this gun , Regards Jos

Phot's = Ebay and Pinterest
You do not have the required permissions to view the files attached to this post.

gebra_de
Member
Posts: 8
Joined: 09 Mar 2014 16:39

Re: 3cm Flak 103/38

Post by gebra_de » 13 Sep 2017 21:19

Grzesio wrote:By the way - what is the purpose of the rod connecting the muzzle brake and the receiver?

Hello,

according to the information I have found, the weapon had an extremely broad scatter regarding its projectiles. Therefore there was an initial attempt to focus the ammo pattern with a rod which should stabilize the barrel.

But after a while it was realized, that the scatter might be quite helpful regarding hitting a target which is hard to focus. Therefore the rod has been deleted after a while.

Best regards
Gert

bam
Member
Posts: 165
Joined: 08 Sep 2005 22:10
Location: moseley-u.k.

Re: 3cm Flak 103/38

Post by bam » 20 Jul 2019 11:45

I read that the rod was Also to help hold the extra muzzle brake on.
The original aircraft mounted 30mm mk103 had a flash muzzle on it with 7 perpendicular holes each side. It was purely for dispersing the powerful exhaust gases safely, it wasn't a brake, it was for splitting the exhaust up into smaller jets to prevent damage to the body of the aircraft.
When they tried putting the mk103 30mm on the 20mm flak 38 carriage, they found the recoil forces were overloading the carriage. So Hptm. Seherr-Thoss at Sagan improvised a muzzle brake. That's why you only see the rod on barrels in the 103/38 mount, where recoil was the main problem. It is best visible on the surrendered carriages in post#91.
It was simple, small angled plates, that deflected the sideways moving exhaust-jets (from the holes in the flash-muzzle), into a backwards direction, thus reducing recoil. To help anchor this fixture and prevent it being blown off, they added the rod, securing the brake to the barrel-base area. They also filled some of the voids in the carriage base with concrete and scrap metal, to add mass to the lafette to stop the whole thing jumping about when fired.
The problem with the 103/38 was they were now firing a 330g shells on a lafette built for 120g shells, and the carriage was basically too light. This lead to stability problems when firing at full auto. It was an expedient design, not a good design.

If the rod improved accuracy, surely it would be seen on mk103's that are mounted on carriages other than the flak 38; e.g. the improvised wood posts. Are there images of rodded mk103's on timber posts?

Return to “Fortifications, Artillery, & Rockets”