Info Request: Pom Pom Guns

[Dili]

Anyone know what Royal Navy ships had High Velocity Pom Pom's? or where to find that info?

[Ian R]

Can you give me the caliber length, ie which 2lb (40mm) weapon do you mean
 
I.E.  40mm (or 2lb)/ L????
 
then I should be able to tell you where to find that level of detail.

[DuckofTindalos]

Do you mean these:

http://www.navweaps.com/Weapons/WNBR_2pounder_m8.htm

If so, then the answer is "pretty much all of them"...

[Dili]

Sure 2-pdr [4 cm/39 (1.575")] Mark VIII http://www.navweaps.com/Weapons/WNBR_2pounder_m8.htm

[font=arial]A higher velocity projectile was introduced in 1938 which required a different breech mechanism and other changes.  However, guns firing only the older low-velocity projectiles were still manufactured throughout World War II and the ammunition was not interchangeable.[/font] 

Edit: Terminus that is the link for both HV and LV.

[DuckofTindalos]

Ah, interesting... Didn't know there was more than one type; guess the article is correct in saying that "standardisation was never a big priority in the RN before 1950"...[:D]

[Dili]

The diference warrants 1 km less in range and proportional reduction in ceiling with that mediocre 580m/s muzzle speed.

[DuckofTindalos]

Well, then if you don't mind my saying, why bother with it in-game, what with slot limitations and everything?

[Dili]

25% less in range/ceiling  is significatif and i think i can get the slot for both at least i have less important devices to drop. WITM 40 remember.

[DuckofTindalos]

Ah, right... Yeah, that should give a few slots to empty and fill with new stuff...

[Ian R]

Ok, so do you want the Mk VIII or the Mk VII?

[Ian R]

Everything up to the Ark Royal had only 8 barrel 2 pounder pom poms, as did the Illustrious and Indomitable classes.
 
The Implacables as designed had a mix of 5 x 8 barrel and 4 x single barrel 2 pounders, but R5/R86 Implacable added 4 x 2 barrel 2 pounders.
 
The Uicorn/Colussus class carried, generally 4 x 2 barrel 2 pounders.
[font="times new roman"] [/font]
QF 2lb mark II:
 

• Calibre: 40 mm L/39
• Shell Weight: 2 lb. (980 g)
• Rate of Fire: 200 rpm
• Effective Range: 1,200 yards (1,000 m)
• Muzzle Velocity: 1,920 feet/second (585 m/s)

QF 2lb mark VIII (designed 1923)
\
[*]Calibre: 40 mm L/39
[*]Shell Weight: 2 lb. (980 g) or 1.8 lb. (820 g) for High-Velocity (HV) round
[*]Rate of Fire: 115 rpm fully automatic
[*]Effective Range: 3,800 yards (3,475 m) or 5,000 yards (4,572 m) HV
[*]Effective Ceiling (HV): 13,300 feet (3,960 m)
[*]Muzzle Velocity: 1,920 feet/s (585 m/s) or 2,300 feet/s (worn gun) (701 m/s)(new gun MV = 2400 fps) for HV
 
All from wikpedia, take it with salt.

[Ian R]

I.E. - its the round, not the guns.

[DuckofTindalos]

Apparently, the breeches had to be changed for the new HV rounds, so it's both round and gun.

[Ian R]

Good point, Terminus

[Dili]

Ian R thanks for your effort but i already have that information. The problem is that most info around about thrm in ships only says 2pdr and nothing more.