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1

Friday, June 4th 2004, 5:26pm

Must...stimulate...conversation...

And I'll do it with the proposed "Zerstorer 1924", since Germany's allowed to replace its older cans next year.

Thoughts?

Zerstorer-24, laid down 1924

Length, 350 ft x Beam, 35.0 ft x Depth, 11.7 ft
1679 tons normal displacement (1550 tons standard)

Main battery: 4 x 5.1-inch
Secondary battery: 1 x 3.5-inch
AA battery: 4 x 0.8-inch

Weight of broadside: 288 lbs

8 TT, 19.7"

Hull unarmored

Battery armor:
Main, 2.0" shields / secondary, 1.0" shields
AA, 1.0" shields

Maximum speed for 42013 shp = 33.65 knots
Approximate cruising radius, 4500 nm / 12 kts

Typical complement: 131-170


Estimated cost, $2.616 million (£654,000)

Remarks:

Caution: Hull structure is subject to strain in open-sea
conditions.

Magazines and engineering spaces are cramped, with poor
watertight subdivision.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 36 tons = 2 pct
Armor, total ..................... 15 tons = 1 pct

Armament 15 tons = 1 pct

Machinery ........................ 923 tons = 55 pct
Hull and fittings; equipment ..... 498 tons = 30 pct
Fuel, ammunition, stores ......... 187 tons = 11 pct
Miscellaneous weights ............ 20 tons = 1 pct
-----
1679 tons = 100 pct

Estimated metacentric height, 1.7 ft

Displacement summary:

Light ship: 1492 tons
Standard displacement: 1550 tons
Normal service: 1679 tons
Full load: 1776 tons

Loading submergence 193 tons/foot

+++++++++++++++++++++++++


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.34

Shellfire needed to sink: 402 lbs = 6.1 x 5.1-inch shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 0.3
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 60 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.23

Relative quality as a seaboat: 1.04

+++++++++++++++++++++++++


Hull form characteristics:

Block coefficient: 0.41
Sharpness coefficient: 0.30
Hull speed coefficient 'M' = 9.00
'Natural speed' for length = 18.7 knots
Power going to wave formation
at top speed: 68 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 195 percent

Relative accommodation and working space: 92 percent


Displacement factor: 54 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.51
(Structure weight per square
foot of hull surface: 38 lbs)

Relative longitudinal hull strength: 1.39
(for 15.5 ft average freeboard;
freeboard adjustment +4.9 ft)

Relative composite hull strength: 0.57

+++++++++++++++++++++++++


[Machine-readable parameters: Spring Style v. 1.2.1]

350.00 x 35.00 x 11.70; 15.50 -- Dimensions
0.41 -- Block coefficient
1924 -- Year laid down
33.65 / 4500 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
20 tons -- Miscellaneous weights
++++++++++
4 x 5.10; 0 -- Main battery; turrets
Central positioning of guns
Gun-shields
:
1 x 3.50; 0 -- Secondary battery; turrets
Gun-shields
:
4 x 0.80 -- Tertiary (QF/AA) battery
Gun-shields
:
0 -- No fourth (light) battery
8 / 0 / 19.70 -- TT / submerged / size
++++++++++
0.00 -- No belt armor
0.00 / 0.00 -- Deck / CT
2.00 / 1.00 / 1.00 / 0.00 -- Battery armor


+++++++++++++++++++++++++++++++++++++++++++++++++++++++



2

Friday, June 4th 2004, 8:02pm

You must be able to read my mind. They're almost exactly the same specs as i had laid out for my own next destroyer class.

How are the mounts arranged? 88mm amidships?

Is this the first outing for the 500mm TT as well? I don't seem to remeber seeing them before.

3

Friday, June 4th 2004, 8:53pm

Maybe I have a mole in your naval design bureau.

The hull size/shape is a coincidence - that's what I can do under the Versailles terms. The presence of an 88 is not a coincidence - I had originally planned for a fifth main gun, but liked what you'd done with the General Cantore class when I saw it Wednesday.

Haven't settled on a layout yet. Probably Fletcher-style, with the 88 as the amidships gun. I might instead make the forward gun a twin mount, or even continue the old practice of sticking a bank of torpedoes ahead of the bridge. It's a moot point until I can draw her.

The 50 cm fish was used in some cruisers and dreadnoughts. For now, it's a good size. Later on, perhaps I'll revisit the H8, a 60 cm torpedo that made it on to a few late units.