how many 20mms on 109G-2?

[AKS\/\/ulfe]

How did they fit 200 20mm rounds into the same area as 200 15mm rounds? Unless the box was too big for 200 15mm rounds to begin with.
-SW

[HoHun]

Hi Akswulfe,

>How did they fit 200 20mm rounds into the same area as 200 15mm rounds?

The cartridge diameter was 25 mm for both the 20 mm and the 15 mm calibre. The 15 mm cartridge had a pronounced bottle shape since the projectile was much smaller than the 20 mm shell, but the maximum dimensions were determined by the much larger casing.

The RLM data sheets give exactly the same length for a belt of 100 rounds for the MG151 and the MG151/20 (3.25 m).

To sum it up, both with 15 mm and 20 mm projectiles, the 25 mm casing you'd get a 32.5 mm belt spacing :-)

Regards,

Henning (HoHun)

[AKS\/\/ulfe]

Ah, I didn't know they used the same size cartridge.

Thanks for clearing that up Hohun.
-SW

[Grendel]

Ahem.

150 and 200 rounds ARE BOTH CORRECT.

200 rounds was the maximum.

150 rounds was usual.

Why?

You got 200 rounds if you had FULL BELT, ammo box full and the belt loaded to the last round.

But that caused some jamming problems.

So it was usual to NOT load the belt completely full, from the ammo box to the cannon. Using "only" 150 rounds the jamming problems were much smaller.

Hence - both 150 and 200 are correct.

Source:
MG151/20 loadout diagram.
Don't have it at hand at work though. Ifyou want to see it I'll try to remember sending it.

[butch2k]

Grendel could you send me a copy of this document, i have various documents/manual pertaining to the MG151 but none clearly specifies that the ammo load was reduced to prevent jamming.
TIA