Warships, naval battles, technology, weapons, navies of all eras, modeling, etc.
http://kbismarck.org/forum/
Prince of Wales' "...main machinery steamed at overload powers of 128,000 to 134,000 shaft horsepower with no difficulties..."Pr.Eugen wrote:In "British, Soviet, French and Dutch Battleships of World War II" by W.Garzke & R.Dulin - 27,5 knots at 112930 hp (42530 t)
May be in Wiki we see data from the project alternatives...
We know about that Duncan.dunmunro wrote:
PoW's log also recorded speeds of 29.1 knots just prior to intercepting Bismarck, and I have posted the excepts on this board.
The two ships have the same machinery, and there's no indication that PoW was at her maximum speed; lightly loaded Howe should be able to achieve 29.5 knots The design specs for the KGV class were 125000shp and 29.25 knots at light displacement. In 1937 Warspite achieved .748 lb/shp. Using the same figure for the KGV class predicts a maximum of ~144000shp at 48 tons/hr (maximum fuel rate). Of course late war, with higher displacements, and in tropical waters these speeds would not be achievable.alecsandros wrote:We know about that Duncan.dunmunro wrote:
PoW's log also recorded speeds of 29.1 knots just prior to intercepting Bismarck, and I have posted the excepts on this board.
But what about Howe's 29.5 ?
dont know where it comes from.alecsandros wrote:Wikipedia Howe page has:
speed: 29.5 knots (55 km/h)
http://en.wikipedia.org/wiki/HMS_Howe_%2832%29#Design
Any idea where this comes from ?
Howe displaced more than the previous KGVs. But maybe some modifications were done to the machinery .. ?dunmunro wrote: ...Of course late war, with higher displacements, and in tropical waters these speeds would not be achievable.
There were some minor machinery variations between Anson, Howe and the first 3 KGVs, but I suspect that Howe's lower trials speeds are also a function of the poorer quality fuel the RN was using in 1942.alecsandros wrote:Howe displaced more than the previous KGVs. But maybe some modifications were done to the machinery .. ?dunmunro wrote: ...Of course late war, with higher displacements, and in tropical waters these speeds would not be achievable.
That's very probable.dunmunro wrote: There were some minor machinery variations between Anson, Howe and the first 3 KGVs, but I suspect that Howe's lower trials speeds are also a function of the poorer quality fuel the RN was using in 1942.
For a variety of reasons, including increased demand for avgas and diesel, the refinery process was extracting more of the lighter portions of crude oil and leaving a much higher viscosity remnant to be used for bunker fuel. This thicker fuel had a higher capacity to absorb sea water and had a higher proportion of unburnable particulates, and caused increased boiler maintenance at the same time, to remove the resulting deposits.alecsandros wrote:That's very probable.dunmunro wrote: There were some minor machinery variations between Anson, Howe and the first 3 KGVs, but I suspect that Howe's lower trials speeds are also a function of the poorer quality fuel the RN was using in 1942.
I never understood why the RN was using lower quality fuel though ?
The RN faced a comparatively small number of attacking aircraft, from both conventional and kamikaze attacks. Consequently they seldom had "free-fire" situations where any aircraft could be considered hostile as typically the CAP outnumber the attacking aircraft. They did shoot down a small number of kamikazes, but the greatest problem was always identifying aircraft as hostile in time to engage them effectively, and the number of aircraft engaged and shot down were probably not large enough to draw any statistical comparisons. Howe, IIRC, was actually the first KGV class BB to join the BEF/BPF. Anson was slated to join the BPF but the war ended just as she arrived, which was a pity as she had the most up to date RN BB AA outfit.alecsandros wrote:It's OT, but we're having the discussion about kamikaze's on the hypothetical engagements:
Do you have some info about the way Howe and Anson AA batteries performed in the Pacific ? I would expect them to be quite good, with all the improvements received in 1943-1944...
Also, a comparison between USN battleships AA effectiveness and RN battleship AA effectiveness would be very interesting...