Naval History Forums

Just for the record, where is this data from? Regards The Design and Construction of British Warships, 1939-1945: The Official Records : Major Surface Warships by DK Brown. Hello Duncan did DK Brown mentioned the heating value/ density of the used fuel oil for instance the german fuel oil used to c...

What book is this from? Regards British Battleships of World War two , by Raven and Roberts. - - - Hi Thorsten, [ 1 ] Were any displacement data provided in connection with the above-mentioned Howe endurance figures? [ 2 ] If one already possessed Friedman's book on British BBs and Burt's updated b...

marcelo_malara wrote: ↑

Tue Aug 06, 2019 6:47 pm

Thorsten Wahl wrote: ↑

Tue Aug 06, 2019 6:46 am

Howe_endurance1.jpg

What book is this from?

Regards

British Battleships of World War two, by Raven and Roberts.

marcelo_malara wrote: ↑

Tue Aug 06, 2019 6:46 pm

dunmunro wrote: ↑

Mon Aug 05, 2019 7:12 pm

KGV recorded .715 lb/shp during trials and 111700shp = 35.65 tons/hr.

Just for the record, where is this data from?

Regards

The Design and Construction of British Warships, 1939-1945: The Official Records : Major Surface Warships by DK Brown.

According to Howse the first 5 operational type 284s fitted to Battleships were Hood, KGV, PoW, QE and probably Nelson. Is it possible to ascertain with any confidence whether those ships were likely the first five ships on any class so fitted? B According to Howse these cruisers had been fitted wi...

marcelo_malara wrote: ↑

Fri Aug 02, 2019 10:26 pm

Can you post those numbers from KGV?

Regards

KGV recorded .715 lb/shp during trials and 111700shp = 35.65 tons/hr.

If we include ranges from light cruisers, whose DCT mounted radar antennae were ~33% lower in height than a battleship's, then the ranges make sense, but they are not representative of actual ranges obtained by battleships in trials or in combat. A couple of thoughts - > CB4112(4) mentions that its...

Hi Dunmunro, > Tovey's report CB 4112(4) dates about a year after the early Nelson and Hood tests and purports to specify "maximum usable ranges" as opposed to maximum possible ranges, which implies analysis of data accumulated from sea service and battle practices. For example, from what I have re...

These sound like ranges obtained from cruisers. Testing from Hood and actual results from KGV were somewhat better than those shown above. RA Burt provides a lengthy quote from Hood's type 284 radar trials in March-April 1941 at Scapa flow, which can be summarized briefly that continuous ranging wa...

These sound like ranges obtained from cruisers. Testing from Hood and actual results from KGV were somewhat better than those shown above. RA Burt provides a lengthy quote from Hood's type 284 radar trials in March-April 1941 at Scapa flow, which can be summarized briefly that continuous ranging was...

Thanks, I will give a look to that book. Anyway, consumption numbers do not look good either. According to a table on Koop´s, page 28 of the English edition, Bismarck at 138000 hp, 265 rpm, attained 29 knots with a consumption of 325 g/hp/hr, that would be 44.85 metric t per hour. USS Massachusetts...

marcelo_malara wrote: ↑

Thu Aug 01, 2019 3:15 am

So it would be lighter than KGV´s?

Regards

Yes, and it directly compares the weight of a 3-shaft versus a 4 shaft powerplant with the same output.

There are three items in the destroyer´s weights labeled machinery/auxiliary machinery in Whitley´s book, don´t know exactly what is each. For a proper comparison I would turn to battleship´s machinery. According to Burt KGV´s machinery weighted 2700 t, for 110.000 hp at 400 psi (27 kg/cm2). Garzke...

marcelo_malara wrote: ↑

Mon Jul 29, 2019 5:31 pm

Brooklyn class for example, 100.000 hp could be achived with two shafts.

USS Brooklyn (CL-40) had 4 shafts.

Since Mr. Jurens is a member of this board, I wonder if he could interject here and explain the reasons for the above-mentioned shortcomings? I do find it odd that with authors of such engineering backgrounds the end result is not THE engineering bible on the ship. I'm not sure it is fair to ask qu...