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1

Tuesday, April 22nd 2008, 4:53am

Request for proposal

Persia is issuing a RfP for bids on building 2 of these ships

E-1v3, Persia Escort laid down 1936

Displacement:
2 781 t light; 2 972 t standard; 3 201 t normal; 3 385 t full load

Dimensions: Length overall / water x beam x draught
412,92 ft / 410,11 ft x 37,73 ft (Bulges 39,37 ft) x 15,42 ft (normal load)
125,86 m / 125,00 m x 11,50 m (Bulges 12,00 m) x 4,70 m

Armament:
6 - 5,12" / 130 mm guns (2x3 guns), 67,03lbs / 30,40kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread
4 - 5,12" / 130 mm guns (2x2 guns), 67,03lbs / 30,40kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
40 - 0,98" / 25,0 mm guns (10x4 guns), 0,48lbs / 0,22kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 690 lbs / 313 kg
Shells per gun, main battery: 300
8 - 24,0" / 609,6 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2,76" / 70 mm 2,36" / 60 mm -
2nd: 2,36" / 60 mm 1,97" / 50 mm -
3rd: 0,79" / 20 mm - -

- Armour deck: 1,18" / 30 mm, Conning tower: 3,15" / 80 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 51 991 shp / 38 785 Kw = 34,00 kts
Range 7 500nm at 11,00 kts
Bunker at max displacement = 413 tons

Complement:
212 - 276

Cost:
£1,887 million / $7,547 million

Distribution of weights at normal displacement:
Armament: 86 tons, 2,7 %
Armour: 315 tons, 9,9 %
- Belts: 0 tons, 0,0 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 77 tons, 2,4 %
- Armour Deck: 224 tons, 7,0 %
- Conning Tower: 15 tons, 0,5 %
Machinery: 1 344 tons, 42,0 %
Hull, fittings & equipment: 935 tons, 29,2 %
Fuel, ammunition & stores: 420 tons, 13,1 %
Miscellaneous weights: 100 tons, 3,1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
874 lbs / 396 Kg = 13,0 x 5,1 " / 130 mm shells or 0,4 torpedoes
Stability (Unstable if below 1.00): 1,02
Metacentric height 1,2 ft / 0,4 m
Roll period: 15,1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 1,00
Seaboat quality (Average = 1.00): 1,02

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,450
Length to Beam Ratio: 10,42 : 1
'Natural speed' for length: 23,18 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 70
Bow angle (Positive = bow angles forward): 7,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22,97 ft / 7,00 m
- Forecastle (20 %): 16,40 ft / 5,00 m
- Mid (50 %): 16,40 ft / 5,00 m
- Quarterdeck (15 %): 16,40 ft / 5,00 m
- Stern: 16,40 ft / 5,00 m
- Average freeboard: 16,93 ft / 5,16 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 162,0 %
- Above water (accommodation/working, high = better): 80,8 %
Waterplane Area: 10 252 Square feet or 952 Square metres
Displacement factor (Displacement / loading): 80 %
Structure weight / hull surface area: 45 lbs/sq ft or 218 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,50
- Longitudinal: 1,80
- Overall: 0,57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform

2

Tuesday, April 22nd 2008, 10:22am

DP triples?

As for cost, Nordmark will do it for cost plus 5% (140tons) per ship.

This post has been edited 1 times, last edit by "Earl822" (Apr 22nd 2008, 10:23am)


3

Tuesday, April 22nd 2008, 11:31am

Quoted

Originally posted by Earl822
DP triples?

As for cost, Nordmark will do it for cost plus 5% (140tons) per ship.


True, DP triples are, historically, problematic: ie, they basically didn't work (at least up until the post-war Swedish triple automatic 15.2cm),

4

Tuesday, April 22nd 2008, 2:52pm

Crap. so a another design might be necessary, RfP withdrawn

This post has been edited 1 times, last edit by "Vukovlad" (Apr 22nd 2008, 3:13pm)