WesWorld

Hi folks. comments please?

cheers

Bernhard

Rosinante, Iberia Fregata laid down 1921

Displacement:
841 t light; 864 t standard; 974 t normal; 1,058 t full load
Loading submergence 121 tons/feet

Dimensions:
213.25 ft x 29.53 ft x 9.84 ft (normal load)
65.00 m x 9.00 m x 3.00 m

Armament:
1 - 3.94" / 100 mm guns
2 - 2.24" / 57 mm guns
4 - 0.53" / 14 mm guns
Weight of broadside 42 lbs / 19 kg

Armour:
Main gun shields 0.79" / 20 mm

Machinery:
Diesel Internal combustion motors,
Direct drive, 1 shaft, 6,062 shp / 4,522 Kw = 21.00 kts
Range 5,000nm at 12.00 kts

Complement:
87 - 113

Cost:
£0.161 million / $0.642 million

Distribution of weights at normal displacement:
Armament: 5 tons, 0.5 %
Armour: 1 tons, 0.1 %
Belts: 0 tons, 0.0 %, Armament: 1 tons, 0.1 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 209 tons, 21.4 %
Hull, fittings & equipment: 551 tons, 56.6 %
Fuel, ammunition & stores: 133 tons, 13.6 %
Miscellaneous weights: 75 tons, 7.7 %

Metacentric height 0.8

Remarks:
Hull space for machinery, storage & compartmentation is excellent
Room for accommodation & workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.02
Shellfire needed to sink: 1,558 lbs / 707 Kg = 51.1 x 3.9 " / 100 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.7
(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: 0.08
Relative quality as seaboat: 1.32

Hull form characteristics:
Block coefficient: 0.550
Sharpness coefficient: 0.39
Hull speed coefficient 'M': 6.57
'Natural speed' for length: 14.60 kts
Power going to wave formation at top speed: 65 %
Trim: 53
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 82.8 %
Relative accommodation and working space: 121.2 %
(Average = 100%)
Displacement factor: 182 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.53
(Structure weight / hull surface area: 73 lbs / square foot or 358 Kg / square metre)
Relative longitudinal hull strength: 5.52
(for 13.12 ft / 4.00 m average freeboard, freeboard adjustment 3.62 ft)
Relative composite hull strength: 1.74

14 mm is actually 13.5 mm - HMGs in 13.5 mm Russian

Comment: It´s a sloop.....

*shrug shoulders*

My knowledge of sloops is limited but judging by WW2 standards your 1921 design looks ok. Shes a good seaboat and her armament is not bad.

I actually have the same prob: documentation on sloops from that time is sparse to non existing. That is why I was asing for input.

I know 17inc's Wagga class is turbine driven but that feels wrong to me. I was torn between reciprocating steam and diesel. Weirdly enough reciprocating makes the boat more expensive. I find that hard to believe....

cheers

Bernhard

British and Indian sloops built 1928 onwards had turbines, I have no sources of earleir sloops of these navies. French sloops in WW2, the oldest from 1931, had diesels. Two Netherlands sloops from 1925 had triple expansion machinery.

Thanks Pengolodh, that was what I was looking for.

well, i figure the Armada is doing enough revolutionary stuff at the mom, so triple expansion engines it is:

Rosinante, Iberia Fregata laid down 1921

Displacement:
806 t light; 829 t standard; 974 t normal; 1,086 t full load
Loading submergence 121 tons/feet

Dimensions:
213.25 ft x 29.53 ft x 9.84 ft (normal load)
65.00 m x 9.00 m x 3.00 m

Armament:
1 - 3.94" / 100 mm guns
2 - 2.24" / 57 mm guns
4 - 0.53" / 14 mm guns
Weight of broadside 42 lbs / 19 kg

Armour:
Main gun shields 0.79" / 20 mm

Machinery:
Oil fired boilers, complex reciprocating steam engines,
Direct drive, 1 shaft, 3,192 ihp / 2,381 Kw = 18.00 kts
Range 5,000nm at 12.00 kts

Complement:
87 - 113

Cost:
£0.150 million / $0.598 million

Distribution of weights at normal displacement:
Armament: 5 tons, 0.5 %
Armour: 1 tons, 0.1 %
Belts: 0 tons, 0.0 %, Armament: 1 tons, 0.1 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 187 tons, 19.2 %
Hull, fittings & equipment: 538 tons, 55.2 %
Fuel, ammunition & stores: 168 tons, 17.3 %
Miscellaneous weights: 75 tons, 7.7 %

Metacentric height 0.8

Remarks:
Hull space for machinery, storage & compartmentation is excellent
Room for accommodation & workspaces is excellent
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: 1.03
Shellfire needed to sink: 1,716 lbs / 778 Kg = 56.2 x 3.9 " / 100 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.8
(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: 0.10
Relative quality as seaboat: 2.00

Hull form characteristics:
Block coefficient: 0.550
Sharpness coefficient: 0.39
Hull speed coefficient 'M': 6.57
'Natural speed' for length: 14.60 kts
Power going to wave formation at top speed: 57 %
Trim: 53
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 75.5 %
Relative accommodation and working space: 121.2 %
(Average = 100%)
Displacement factor: 198 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.53
(Structure weight / hull surface area: 72 lbs / square foot or 349 Kg / square metre)
Relative longitudinal hull strength: 5.39
(for 13.12 ft / 4.00 m average freeboard, freeboard adjustment 3.62 ft)
Relative composite hull strength: 1.73

14 mm is actually 13.5 mm - HMGs in 13.5 mm Russian