Search found 4001 matches

by dunmunro
Fri Apr 30, 2021 8:08 pm
Forum: Naval Weapons
Topic: Royal Navy destroyer guns of WW2.
Replies: 1
Views: 119

Re: Royal Navy destroyer guns of WW2.

I've been trying to find out how much explosive were actually in HE shells used in 4"/45 (10.2 cm) QF Mark XVI, 4.7"/45 (12 cm) QF Mark XII and the 4.5"/45 (11.4 cm) QF Mk4. I have been reading the handbook of ammunition 1945 and it states that S.A.P have around 4% of total weight but it doesnt men...
by dunmunro
Fri Apr 30, 2021 8:05 pm
Forum: Naval Weapons
Topic: British 4.5"/45 (11.4 cm) vs American 5"/38 (12.7 cm) Mark 12
Replies: 2
Views: 75

Re: British 4.5"/45 (11.4 cm) vs American 5"/38 (12.7 cm) Mark 12

I've read that the 5" was an effective aa weapon especially with vt fuses and a large burster but what about the British 4.5"? Actually, the 5in/38 was quite ineffective as an AA weapon but it's performance was greatly overestimated by the USN. Certainly VT ammo helped but the rounds needed per AA ...
by dunmunro
Tue Apr 20, 2021 5:48 pm
Forum: Naval History (1922-1945)
Topic: SoDak TDS
Replies: 1
Views: 294

Re: SoDak TDS

So I have read some articles claiming that issues with SoDak and Iowa's TDS schemes were addressed after the caisson tests. Is this verifible? AIUI, the response was to alter the liquid loading scheme, to keep the outer voids full of fuel or water, but there were no physical changes to the TDS and ...
by dunmunro
Wed Apr 14, 2021 7:19 pm
Forum: Hypothetical Naval Scenarios
Topic: Vittorio Veneto in the Atlantic
Replies: 3
Views: 264

Re: Vittorio Veneto in the Atlantic

Can I raise a scenario I don't think has been raised before - what could have happened if the Vittorio Veneto had escaped into the Atlantic during 1940? There are of course a number of problems with this, being first one being how does the VV get through the Straits of Gibraltar unscathed and the o...
by dunmunro
Thu Apr 01, 2021 4:42 am
Forum: Bismarck General Discussion
Topic: bismark-after torpedo hit
Replies: 203
Views: 12991

Re: bismark-after torpedo hit

RN Fuel State. At Noon on 26 May KGV had 32% fuel remaining = ~1200 tons ( Naval Staff History ) Signal from Rodney to KGV: RODNEY (visual) to CinC H.F. 1911/26 Your 1829-RODNEY had 1600 tons of oil on hand at 1800. We use at present speed 23 tons per hour and 19 tons per hour at 20 knots. Clyde an...
by dunmunro
Mon Mar 22, 2021 6:04 am
Forum: Naval Technology
Topic: Idiots guide to....
Replies: 13
Views: 996

Re: Idiots guide to....

I have to admit that I'm somewhat skeptical that the Naval Armor and Ballistics program "...is very useful and educational", at least for long-range naval gunfire. It appears to (still) be based on MCTRAJ, a small-arms ballistic program which, due to scaling issues, really doesn't model big artille...
by dunmunro
Sat Mar 20, 2021 10:12 pm
Forum: Naval Technology
Topic: Idiots guide to....
Replies: 13
Views: 996

Re: Idiots guide to....

Shells and armour plate please! I read a lot online in regards to shell performance and the quality of armoured plate and see a lot of very complicated mathematics! Now Ill be honest I feel like a limbo dancer sometimes when I read posts about this subject because everything goes over my head! I ha...
by dunmunro
Sat Mar 20, 2021 10:11 pm
Forum: Naval Technology
Topic: Idiots guide to....
Replies: 13
Views: 996

Re: Idiots guide to....

Shells and armour plate please! I read a lot online in regards to shell performance and the quality of armoured plate and see a lot of very complicated mathematics! Now Ill be honest I feel like a limbo dancer sometimes when I read posts about this subject because everything goes over my head! I ha...
by dunmunro
Wed Mar 03, 2021 9:29 pm
Forum: The Dreadnought Era (1906-1921)
Topic: Royal Navy Super Battleships and Battlecruisers
Replies: 124
Views: 69922

Re: Royal Navy Super Battleships and Battlecruisers

Hi Dunmunro, I guess it then boils down to which RN document one chooses to subscribe to. I did not, as you know, make up the cited range numbers (which dated from 1942). A transcription of the original RN text was post on KB about six(?) months ago IIRC. Byron I don't recall all the particulars, e...
by dunmunro
Wed Mar 03, 2021 6:32 pm
Forum: The Dreadnought Era (1906-1921)
Topic: Royal Navy Super Battleships and Battlecruisers
Replies: 124
Views: 69922

Re: Royal Navy Super Battleships and Battlecruisers

Re the accuracy of Hood’s opening gunnery, the relatively early model of RDF Type 284 she carried - when employed for FC ranging purposes (as opposed to surface search) - was only considered “effective” at 16-18,000 yards. B This is an except of HMS Hood's Type 284 radar trials using KGV as a targe...
by dunmunro
Mon Mar 01, 2021 1:50 am
Forum: The Dreadnought Era (1906-1921)
Topic: Royal Navy Super Battleships and Battlecruisers
Replies: 124
Views: 69922

Re: Royal Navy Super Battleships and Battlecruisers

Gentlemen, Re the proposed super battleships and Battlecruisers, i can understand why in the 1920's they wanted to build very powerful battleships, but regarding the 'Super battle cruisers, it was pointed out in another topic that the point of having battlecruisers was to chase away enemy cruisers....
by dunmunro
Mon Mar 01, 2021 12:00 am
Forum: Naval History (1922-1945)
Topic: Erroneously landing on an enemy aircraft carrier?!
Replies: 13
Views: 1333

Re: Erroneously landing on an enemy aircraft carrier?!

In May 1942 it appears that IJN aircraft may have signalled a USN carrier in an attempt to land on her: USNI Report on Coral Sea: The combat patrols were landed well after sunset. In the case of the Yorktown, this was begun at 1858 and completed at 1930. While the fighters were in the landing circle...
by dunmunro
Sun Jan 10, 2021 10:03 am
Forum: Naval History in General
Topic: the main armament of the General Belgrano
Replies: 25
Views: 1198

Re: the main armament of the General Belgrano

Gentlemen, Just looking up the main armament of the Argentinian cruiser General Belgrano it states that she carried no less than 15 x 6" guns, i can only find a very indistinct photo of the ship, so I wonder how these guns were distributed on what was described as a 'light cruiser' of only twelve a...