WesWorld

Well, as it seems Walter had much fun with the quiz so he asked me if I could start another one. Sure, not a problem, I told him.

So here it is:




What is it and what about its stats?

First hint: It was laid down pre-WW1.

Have fun,

HoOmAn

You went from a fairly easy one to full blown mind bending "what the hell is this!" design lol. Obviously shes converted from a merchantile hull. My guess is thats shes either a converted sloop or mine layer/sweeper as she's got a heafty armament for a merchantile hull. I would say shes armed with 4x4" and 4x40mm. I think shes capable of around 14 knots with a length of about 90m.

I take that as a compliment. :o)

Hint: She´s not converted even though this has little to say.

You´re right calling it a sloop if you´re referring to CT categories. Otherwise she should be called a gunboat.

You´re not correct about her length (I simed her at waterline length).

The number of guns you identified is correct, the size is not. Same for her speed.

... your Centaur class sloop. That one has 4 x 8.8 cm and 4 x 5.5 cm. The other type sloops don't have 4 main and four secondaries.

I don't have the time now to look at it any further but I will take a look at it this afternoon after I get back from work.

Walter

Using 35x35cm and some pixel counting, I got to 67.2 x 9.45 x 3.5 m, close enough to the Centaur's 67.6 x 9.5 x 3.50 m.
Various things are given in the infrastructure section (Dimensions, displacements, armament, speed, range), but the remaining few is guesswork (BC, Armor, Machinery, Year laid down, hull strength left, Freeboard, trim).

This would be my guess:

Centaur, South Africa Sloop laid down 1905

Displacement:
802 t light; 835 t standard; 1,224 t normal; 1,530 t full load
Loading submergence 131 tons/feet

Dimensions:
221.78 ft x 31.17 ft x 11.48 ft (normal load)
67.60 m x 9.50 m x 3.50 m

Armament:
4 - 3.46" / 88 mm guns
4 - 2.17" / 55 mm guns
Weight of broadside 103 lbs / 47 kg

Armour:
Main gun shields 1.00" / 25 mm, 2nd gun shields 1.00" / 25 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 2,409 shp / 1,797 Kw = 16.28 kts
Range 12,000nm at 10.00 kts

Complement:
103 - 134

Cost:
£0.064 million / $0.258 million

Distribution of weights at normal displacement:
Armament: 13 tons, 1.1 %
Armour: 6 tons, 0.5 %
Belts: 0 tons, 0.0 %, Armament: 6 tons, 0.5 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 182 tons, 14.9 %
Hull, fittings & equipment: 600 tons, 49.1 %
Fuel, ammunition & stores: 422 tons, 34.5 %
Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 1.3

Remarks:
Hull space for machinery, storage & compartmentation is excellent
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable and able to fight her guns in the heaviest weather

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.25
Shellfire needed to sink: 2,783 lbs / 1,262 Kg = 133.8 x 3.5 " / 88 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 1.3
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 100 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.16
Relative quality as seaboat: 2.00

Hull form characteristics:
Block coefficient: 0.540
Sharpness coefficient: 0.39
Hull speed coefficient 'M': 6.34
'Natural speed' for length: 14.89 kts
Power going to wave formation at top speed: 51 %
Trim: 50
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 57.7 %
Relative accommodation and working space: 106.8 %
(Average = 100%)
Displacement factor: 258 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.45
(Structure weight / hull surface area: 74 lbs / square foot or 360 Kg / square metre)
Relative longitudinal hull strength: 4.84
(for 12.63 ft / 3.85 m average freeboard, freeboard adjustment 2.68 ft)
Relative composite hull strength: 1.64


Walter

Well done! It is indeed my Centaur-class sloop. I see, you´ve made it through my listings!

Here are her full stats:

Centaur-class, South African Gunboat laid down 1911

Displacement:
839 t light; 872 t standard; 1.246 t normal; 1.539 t full load
Loading submergence 132 tons/feet

Dimensions:
221,46 ft x 31,17 ft x 11,48 ft (normal load)
67,50 m x 9,50 m x 3,50 m

Armament:
4 - 3,46" / 88 mm guns
4 - 2,17" / 55 mm guns
Weight of broadside 103 lbs / 47 kg

Armour:
Main gun shields 0,98" / 25 mm, 2nd gun shields 0,98" / 25 mm

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 2.447 ihp / 1.825 Kw = 16,28 kts
Range 11.000nm at 10,00 kts

Complement:
104 - 136

Cost:
£0,063 million / $0,252 million

Distribution of weights at normal displacement:
Armament: 13 tons, 1,0%
Armour: 6 tons, 0,5%
Belts: 0 tons, 0,0%, Armament: 6 tons, 0,5%, Armour Deck: 0 tons, 0,0%
Conning Tower: 0 tons, 0,0%, Torpedo bulkhead: 0 tons, 0,0%
Machinery: 163 tons, 13,1%
Hull, fittings & equipment: 357 tons, 28,7%
Fuel, ammunition & stores: 407 tons, 32,7%
Miscellaneous weights: 300 tons, 24,1%

Metacentric height 1,1

Remarks:
Hull space for machinery, storage & compartmentation is excellent
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable and able to fight her guns in the heaviest weather

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1,15
Shellfire needed to sink: 1.918 lbs / 870 Kg = 92,2 x 3,5 " / 88 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0,9
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 71 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0,12
Relative quality as seaboat: 1,92

Hull form characteristics:
Block coefficient: 0,550
Sharpness coefficient: 0,39
Hull speed coefficient 'M': 6,29
'Natural speed' for length: 14,88 kts
Power going to wave formation at top speed: 52 %
Trim: 37
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 77,2%
Relative accommodation and working space: 97,3%
(Average = 100%)
Displacement factor: 170%
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0,91
(Structure weight / hull surface area: 45 lbs / square foot or 219 Kg / square metre)
Relative longitudinal hull strength: 2,56
(for 11,48 ft / 3,50 m average freeboard, freeboard adjustment 1,50 ft)
Relative composite hull strength: 1,01

I think the Pre WWI hint was the giveaway. That and the fact that I saw this post at about 5:30 AM this morning (when I actually have to start working ;, and Wes already gave a reply. I knew I had to look at sloops and the Centaur class was the only one that could be the one.
For the stats, I used the ones in your infrastructure.

========================================
Centaur-class (11 units):RSAN Cheiron, RSAN Nessos, RSAN Pholos, RSAN Eurytion, RSAN Rhötos, RSAN Peträos, RSAN Diktys, RSAN Cyllaros, RSAN Hylonome, RSAN Rhoikos, RSAN Hylaios

Length, 67.6 m x Beam, 9.5 m x Depth, 3.5 m
1224 tonnes normal (835 tonnes standard, 802 tonnes light)
Main battery: 4 x 8.8-cm
Secondary battery: 4 x 5.5-cm
Maximum speed for 1799 shaft kw = 16.28 knots
Approximate cruising radius, 12000 nm / 10 knots
Typical complement: 103-134
Hull unarmored
Ship has slow, easy roll; a good, steady gun platform
Excellent seaboat; comfortable and able to fight her guns in the heaviest weather
Magazines and engineering spaces are roomy, with superior watertight subdivision

========================================

I originally simmed it oil firing and steam turbines, and got the exact 835 tons. However, I thought you could have used coalfiring and complex reciprocating, but I couldn't get it quite to 835 tons.

But it seems that you changed the design a bit. compared to the one in your infrastructure. What I simmed might have been the older (Springstyle) design.

... but you're not the only one with changes. I still need to adjust the data of my fleet. Had to adjust the length-beam ratios on numerous vessels, and last week (or so), I decided to go for a metric caliber size for my guns instead of imperial. That caused a few headaches, since with some designs, hull strength would drop below 1.

Walter

I have simmed her again with springsharp, yes, and it slightly changed the design. This one and some others too but so far I don´t see a need to change all data in the infrastructure board. The informations over there weren´t 100% perfect anyway because it was my intention to use that post about my ships as some kinf od Jane´s for you. And you know, Jane´s not alway correct on a given designs specifications. It also contains official dara, a fact you have to keep in mind, though. :o)

So the post in the infrastructure board is some kind of a guideline but as long as I haven´t posted the original springstyle or springsharp dataset one could not be sure the specs listed are correct.

Cheers,

HoOmAn