WesWorld

Gentlemen,

I´d like to introduce a drawing of the SAEs only battlecruiser class.

What do you think of her?

Thanks for your input,

HoOmAn




Hertog class, South African Battlecruiser laid down 1911

Displacement:
21.316 t light; 22.416 t standard; 24.741 t normal; 26.502 t full load
Loading submergence 1.092 tons/feet

Dimensions:
705,38 ft x 88,58 ft x 28,87 ft (normal load)
215,00 m x 27,00 m x 8,80 m

Armament:
8 - 11,02" / 280 mm guns (4 Main turrets x 2 guns, 2 superfiring turrets)
Aft turrets separated by engine room
16 - 5,91" / 150 mm guns
12 - 3,46" / 88 mm QF guns
8 - 0,79" / 20 mm guns
Weight of broadside 7.257 lbs / 3.292 kg
4 - 21,0" / 533 mm submerged torpedo tubes

Armour:
Belt 11,81" / 300 mm, upper belt 7,87" / 200 mm, end belts 3,94" / 100 mm
Belts cover 97% of normal area
Main turrets 11,02" / 280 mm, 2nd gun shields 5,91" / 150 mm
QF gun shields 0,98" / 25 mm
Armour deck 1,97" / 50 mm, Conning tower 7,09" / 180 mm
Torpedo bulkhead 0,98" / 25 mm

Machinery:
Coal and oil fired boilers, steam turbines,
Geared drive, 4 shafts, 77.530 shp / 57.837 Kw = 27,50 kts
Range 9.100nm at 12,00 kts

Complement:
986 - 1.282

Cost:
£1,970 million / $7,878 million

Distribution of weights at normal displacement:
Armament: 907 tons, 3,7%
Armour: 8.139 tons, 32,9%
Belts: 4.042 tons, 16,3%, Armament: 2.094 tons, 8,5%, Armour Deck: 1.392 tons, 5,6%
Conning Tower: 130 tons, 0,5%, Torpedo bulkhead: 482 tons, 1,9%
Machinery: 3.296 tons, 13,3%
Hull, fittings & equipment: 8.973 tons, 36,3%
Fuel, ammunition & stores: 3.425 tons, 13,8%
Miscellaneous weights: 0 tons, 0,0%

Metacentric height 4,3

Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1,02
Shellfire needed to sink: 22.792 lbs / 10.338 Kg = 34,0 x 11,0 " / 280 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 3,3
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0,44
Relative quality as seaboat: 1,12

Hull form characteristics:
Block coefficient: 0,480
Sharpness coefficient: 0,35
Hull speed coefficient 'M': 7,41
'Natural speed' for length: 26,56 kts
Power going to wave formation at top speed: 46 %
Trim: 63
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 95,8%
Relative accommodation and working space: 126,7%
(Average = 100%)
Displacement factor: 113%
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0,99
(Structure weight / hull surface area: 158 lbs / square foot or 773 Kg / square metre)
Relative longitudinal hull strength: 1,00
(for 17,16 ft / 5,23 m average freeboard, freeboard adjustment -0,99 ft)
Relative composite hull strength: 1,00

Shes very nice, shes the rough equivilant of the now scraped or sold BC's of Atlantis and would likely out armor them in some area's. I have two comments (both more observations than comments). I'm used to seeing BC's like Hood and Kirishima having the widest part of their hull further aft around the main mast area or slightly forward of it. On this design and others from the SAE I'm used to seeing the widest part of the hull more towards the front half of the ship sort of like the older american dreadnoughts. What is the idea behind this and what significant difference does it make? I also noticed the two cranes look very different from the normal type the SAE use, is this a new design feature of something you have just cooked up on your warship parts template?

just one question...
were casemated secondary guns still the fashion around 1922/3?

Well most navy's had BB's and BC's with casemate guns as late as the very end of WW2 so a 1911 design still sporting them in 1922/23 would not be out of the ordinary.

The drawing shows her in the 20s (light AA guns) but she was build 1911 and thus casemats are quite normal.

On that crane. You´re right on both again. It´s new on my template and new on a ship. I needed a long crane to lift and lower the boats but couldn´t use a bone on the mast aft. The cranes I normally used are too short.

Hope this helps,

HoOmAn

There´s no reason for the beam. In fact the hull is widest right in the middle of the ship.

Cheers,

HoOmAn

I must be going blind!
I saw the date under the drawing and missed the laying down date on the line under it....DOH!!

Shit happens....

What I meant by the widest part was the point at which the main deck is its widest across the hull. If you look at a top veiw of Hood (if its a god one) you can notice that this widest part is right about where the main mast is or near where the hull steps down to the quarter deck. Also on my various models of Hood I notice upon inspection that this widest part of the beam is even more pronounced than the main deck at the waterline. What I mean by this is if you look right exactly in the middle of the ship on a top veiw this beamiest point is off center either forward or aft of that "centerline".

Is this also true for german warships of both WW1- and WW2-era?

I´m still not sure if I got your point, Wes. I know that several units had their beamiest part aft of the centerline around the main mast. IIRC, I once read that this is hydradynamical the best solution.

However, well until WW2 most warship designs didn´t use this hull form....

Regards,

HoOmAn

I think I'm explaining in my usual laymens term because I can't remember the correct term to use to explain what I'm talking about so bear with me here.
What I mean is the point (loking at a top veiw) where a ships hull stops curving outward away from the stern and begins to curve back inwards towards the bow.

The Badens have this hull form and the Ostfriesland class appear to also have it. All other german capital ships have a more block hull midships. In other words their hulls curve outward away from the stern to a point wher the ship is its widest and the hull continues at this point for some time creating a straight side and then curves unward to from the bow.

Anyway I just noticed that most capital ships have this widest part of the ship farther aft then the center of the ship but some ships have this further forward of the center.