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E-1, Persia Escort laid down 1936

Displacement:

2 217 t light; 2 313 t standard; 2 479 t normal; 2 612 t full load

Dimensions: Length overall / water x beam x draught

394,90 ft / 393,70 ft x 32,81 ft x 14,76 ft (normal load)

120,37 m / 120,00 m x 10,00 m x 4,50 m

Armament:

6 - 5,12" / 130 mm guns (3x2 guns), 67,03lbs / 30,41kg shells, 1936 Model

Dual purpose guns in deck mounts with hoists

on centreline ends, majority forward, 1 raised mount - superfiring

20 - 0,98" / 25,0 mm guns (10x2 guns), 0,48lbs / 0,22kg shells, 1936 Model

Anti-aircraft guns in deck mounts

on side, evenly spread

Weight of broadside 412 lbs / 187 kg

Shells per gun, main battery: 200

Armour:

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)

Main: 1,57" / 40 mm - -

2nd: 0,79" / 20 mm - -

- Armour deck: 0,39" / 10 mm, Conning tower: 1,57" / 40 mm

Machinery:

Oil fired boilers, steam turbines,

Geared drive, 2 shafts, 46 332 shp / 34 563 Kw = 33,00 kts

Range 6 000nm at 11,00 kts

Bunker at max displacement = 299 tons

Complement:

175 - 228

Cost:

£1,488 million / $5,953 million

Distribution of weights at normal displacement:

Armament: 51 tons, 2,1 %

Armour: 92 tons, 3,7 %

- Belts: 0 tons, 0,0 %

- Torpedo bulkhead: 0 tons, 0,0 %

- Armament: 26 tons, 1,0 %

- Armour Deck: 60 tons, 2,4 %

- Conning Tower: 6 tons, 0,3 %

Machinery: 1 153 tons, 46,5 %

Hull, fittings & equipment: 880 tons, 35,5 %

Fuel, ammunition & stores: 263 tons, 10,6 %

Miscellaneous weights: 40 tons, 1,6 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

821 lbs / 372 Kg = 12,2 x 5,1 " / 130 mm shells or 0,3 torpedoes

Stability (Unstable if below 1.00): 1,09

Metacentric height 1,1 ft / 0,3 m

Roll period: 13,0 seconds

Steadiness - As gun platform (Average = 50 %): 70 %

- Recoil effect (Restricted arc if above 1.00): 0,91

Seaboat quality (Average = 1.00): 1,11

Hull form characteristics:

Hull has a flush deck

Block coefficient: 0,455

Length to Beam Ratio: 12,00 : 1

'Natural speed' for length: 19,84 kts

Power going to wave formation at top speed: 63 %

Trim (Max stability = 0, Max steadiness = 100): 63

Bow angle (Positive = bow angles forward): 3,50 degrees

Stern overhang: 0,00 ft / 0,00 m

Freeboard (% = measuring location as a percentage of overall length):

- Stem: 19,69 ft / 6,00 m

- Forecastle (20 %): 14,76 ft / 4,50 m

- Mid (50 %): 14,76 ft / 4,50 m

- Quarterdeck (15 %): 14,76 ft / 4,50 m

- Stern: 14,76 ft / 4,50 m

- Average freeboard: 15,16 ft / 4,62 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 168,5 %

- Above water (accommodation/working, high = better): 132,9 %

Waterplane Area: 8 273 Square feet or 769 Square metres

Displacement factor (Displacement / loading): 79 %

Structure weight / hull surface area: 49 lbs/sq ft or 237 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 0,66

- Longitudinal: 2,22

- Overall: 0,75

Hull space for machinery, storage, compartmentation is cramped

Room for accommodation and workspaces is excellent

Ship has slow, easy roll, a good, steady gun platform

I was playing around with this when I noticed something odd, when I thought of giving the hull some shrapnel protection the required main belt to cover engine and magazines are longer than the ship and yet no construction warning appeared, a known bug?

Displacement:

2 217 t light; 2 313 t standard; 2 479 t normal; 2 612 t full load

Dimensions: Length overall / water x beam x draught

394,90 ft / 393,70 ft x 32,81 ft x 14,76 ft (normal load)

120,37 m / 120,00 m x 10,00 m x 4,50 m

Armament:

6 - 5,12" / 130 mm guns (3x2 guns), 67,03lbs / 30,41kg shells, 1936 Model

Dual purpose guns in deck mounts with hoists

on centreline ends, majority forward, 1 raised mount - superfiring

20 - 0,98" / 25,0 mm guns (10x2 guns), 0,48lbs / 0,22kg shells, 1936 Model

Anti-aircraft guns in deck mounts

on side, evenly spread

Weight of broadside 412 lbs / 187 kg

Shells per gun, main battery: 200

Armour:

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)

Main: 1,57" / 40 mm - -

2nd: 0,79" / 20 mm - -

- Armour deck: 0,39" / 10 mm, Conning tower: 1,57" / 40 mm

Machinery:

Oil fired boilers, steam turbines,

Geared drive, 2 shafts, 46 332 shp / 34 563 Kw = 33,00 kts

Range 6 000nm at 11,00 kts

Bunker at max displacement = 299 tons

Complement:

175 - 228

Cost:

£1,488 million / $5,953 million

Distribution of weights at normal displacement:

Armament: 51 tons, 2,1 %

Armour: 92 tons, 3,7 %

- Belts: 0 tons, 0,0 %

- Torpedo bulkhead: 0 tons, 0,0 %

- Armament: 26 tons, 1,0 %

- Armour Deck: 60 tons, 2,4 %

- Conning Tower: 6 tons, 0,3 %

Machinery: 1 153 tons, 46,5 %

Hull, fittings & equipment: 880 tons, 35,5 %

Fuel, ammunition & stores: 263 tons, 10,6 %

Miscellaneous weights: 40 tons, 1,6 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

821 lbs / 372 Kg = 12,2 x 5,1 " / 130 mm shells or 0,3 torpedoes

Stability (Unstable if below 1.00): 1,09

Metacentric height 1,1 ft / 0,3 m

Roll period: 13,0 seconds

Steadiness - As gun platform (Average = 50 %): 70 %

- Recoil effect (Restricted arc if above 1.00): 0,91

Seaboat quality (Average = 1.00): 1,11

Hull form characteristics:

Hull has a flush deck

Block coefficient: 0,455

Length to Beam Ratio: 12,00 : 1

'Natural speed' for length: 19,84 kts

Power going to wave formation at top speed: 63 %

Trim (Max stability = 0, Max steadiness = 100): 63

Bow angle (Positive = bow angles forward): 3,50 degrees

Stern overhang: 0,00 ft / 0,00 m

Freeboard (% = measuring location as a percentage of overall length):

- Stem: 19,69 ft / 6,00 m

- Forecastle (20 %): 14,76 ft / 4,50 m

- Mid (50 %): 14,76 ft / 4,50 m

- Quarterdeck (15 %): 14,76 ft / 4,50 m

- Stern: 14,76 ft / 4,50 m

- Average freeboard: 15,16 ft / 4,62 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 168,5 %

- Above water (accommodation/working, high = better): 132,9 %

Waterplane Area: 8 273 Square feet or 769 Square metres

Displacement factor (Displacement / loading): 79 %

Structure weight / hull surface area: 49 lbs/sq ft or 237 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 0,66

- Longitudinal: 2,22

- Overall: 0,75

Hull space for machinery, storage, compartmentation is cramped

Room for accommodation and workspaces is excellent

Ship has slow, easy roll, a good, steady gun platform

I was playing around with this when I noticed something odd, when I thought of giving the hull some shrapnel protection the required main belt to cover engine and magazines are longer than the ship and yet no construction warning appeared, a known bug?

E-1, Persia Escort laid down 1936

Displacement:

2 217 t light; 2 313 t standard; 2 479 t normal; 2 612 t full load

Dimensions: Length overall / water x beam x draught

395,77 ft / 393,70 ft x 32,81 ft x 14,76 ft (normal load)

120,63 m / 120,00 m x 10,00 m x 4,50 m

Armament:

6 - 5,12" / 130 mm guns (3x2 guns), 67,03lbs / 30,40kg shells, 1936 Model

Dual purpose guns in deck mounts with hoists

on centreline ends, majority forward, 1 raised mount - superfiring

20 - 0,98" / 25,0 mm guns (10x2 guns), 0,48lbs / 0,22kg shells, 1936 Model

Anti-aircraft guns in deck mounts

on side, evenly spread

Weight of broadside 412 lbs / 187 kg

Shells per gun, main battery: 200

Armour:

- Belts: Width (max) Length (avg) Height (avg)

Main: 0,39" / 10 mm 393,70 ft / 120,00 m 9,84 ft / 3,00 m

Ends: Unarmoured

Main Belt covers 154 % of normal length

Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)

Main: 1,57" / 40 mm - -

2nd: 0,79" / 20 mm - -

- Armour deck: 0,39" / 10 mm, Conning tower: 1,57" / 40 mm

Machinery:

Oil fired boilers, steam turbines,

Geared drive, 2 shafts, 46 332 shp / 34 563 Kw = 33,00 kts

Range 6 000nm at 11,00 kts

Bunker at max displacement = 299 tons

Complement:

175 - 228

Cost:

£1,481 million / $5,923 million

Distribution of weights at normal displacement:

Armament: 51 tons, 2,1 %

Armour: 149 tons, 6,0 %

- Belts: 56 tons, 2,3 %

- Torpedo bulkhead: 0 tons, 0,0 %

- Armament: 26 tons, 1,0 %

- Armour Deck: 60 tons, 2,4 %

- Conning Tower: 6 tons, 0,3 %

Machinery: 1 143 tons, 46,1 %

Hull, fittings & equipment: 833 tons, 33,6 %

Fuel, ammunition & stores: 263 tons, 10,6 %

Miscellaneous weights: 40 tons, 1,6 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

792 lbs / 359 Kg = 11,8 x 5,1 " / 130 mm shells or 0,3 torpedoes

Stability (Unstable if below 1.00): 1,10

Metacentric height 1,1 ft / 0,3 m

Roll period: 13,0 seconds

Steadiness - As gun platform (Average = 50 %): 70 %

- Recoil effect (Restricted arc if above 1.00): 0,91

Seaboat quality (Average = 1.00): 1,12

Hull form characteristics:

Hull has a flush deck

Block coefficient: 0,455

Length to Beam Ratio: 12,00 : 1

'Natural speed' for length: 19,84 kts

Power going to wave formation at top speed: 63 %

Trim (Max stability = 0, Max steadiness = 100): 63

Bow angle (Positive = bow angles forward): 6,00 degrees

Stern overhang: 0,00 ft / 0,00 m

Freeboard (% = measuring location as a percentage of overall length):

- Stem: 19,69 ft / 6,00 m

- Forecastle (20 %): 14,76 ft / 4,50 m

- Mid (50 %): 14,76 ft / 4,50 m

- Quarterdeck (15 %): 14,76 ft / 4,50 m

- Stern: 14,76 ft / 4,50 m

- Average freeboard: 15,16 ft / 4,62 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 167,1 %

- Above water (accommodation/working, high = better): 132,9 %

Waterplane Area: 8 273 Square feet or 769 Square metres

Displacement factor (Displacement / loading): 77 %

Structure weight / hull surface area: 46 lbs/sq ft or 225 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 0,63

- Longitudinal: 2,11

- Overall: 0,71

Hull space for machinery, storage, compartmentation is cramped

Room for accommodation and workspaces is excellent

Ship has slow, easy roll, a good, steady gun platform

To make it more obvious

Displacement:

2 217 t light; 2 313 t standard; 2 479 t normal; 2 612 t full load

Dimensions: Length overall / water x beam x draught

395,77 ft / 393,70 ft x 32,81 ft x 14,76 ft (normal load)

120,63 m / 120,00 m x 10,00 m x 4,50 m

Armament:

6 - 5,12" / 130 mm guns (3x2 guns), 67,03lbs / 30,40kg shells, 1936 Model

Dual purpose guns in deck mounts with hoists

on centreline ends, majority forward, 1 raised mount - superfiring

20 - 0,98" / 25,0 mm guns (10x2 guns), 0,48lbs / 0,22kg shells, 1936 Model

Anti-aircraft guns in deck mounts

on side, evenly spread

Weight of broadside 412 lbs / 187 kg

Shells per gun, main battery: 200

Armour:

- Belts: Width (max) Length (avg) Height (avg)

Main: 0,39" / 10 mm 393,70 ft / 120,00 m 9,84 ft / 3,00 m

Ends: Unarmoured

Main Belt covers 154 % of normal length

Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)

Main: 1,57" / 40 mm - -

2nd: 0,79" / 20 mm - -

- Armour deck: 0,39" / 10 mm, Conning tower: 1,57" / 40 mm

Machinery:

Oil fired boilers, steam turbines,

Geared drive, 2 shafts, 46 332 shp / 34 563 Kw = 33,00 kts

Range 6 000nm at 11,00 kts

Bunker at max displacement = 299 tons

Complement:

175 - 228

Cost:

£1,481 million / $5,923 million

Distribution of weights at normal displacement:

Armament: 51 tons, 2,1 %

Armour: 149 tons, 6,0 %

- Belts: 56 tons, 2,3 %

- Torpedo bulkhead: 0 tons, 0,0 %

- Armament: 26 tons, 1,0 %

- Armour Deck: 60 tons, 2,4 %

- Conning Tower: 6 tons, 0,3 %

Machinery: 1 143 tons, 46,1 %

Hull, fittings & equipment: 833 tons, 33,6 %

Fuel, ammunition & stores: 263 tons, 10,6 %

Miscellaneous weights: 40 tons, 1,6 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

792 lbs / 359 Kg = 11,8 x 5,1 " / 130 mm shells or 0,3 torpedoes

Stability (Unstable if below 1.00): 1,10

Metacentric height 1,1 ft / 0,3 m

Roll period: 13,0 seconds

Steadiness - As gun platform (Average = 50 %): 70 %

- Recoil effect (Restricted arc if above 1.00): 0,91

Seaboat quality (Average = 1.00): 1,12

Hull form characteristics:

Hull has a flush deck

Block coefficient: 0,455

Length to Beam Ratio: 12,00 : 1

'Natural speed' for length: 19,84 kts

Power going to wave formation at top speed: 63 %

Trim (Max stability = 0, Max steadiness = 100): 63

Bow angle (Positive = bow angles forward): 6,00 degrees

Stern overhang: 0,00 ft / 0,00 m

Freeboard (% = measuring location as a percentage of overall length):

- Stem: 19,69 ft / 6,00 m

- Forecastle (20 %): 14,76 ft / 4,50 m

- Mid (50 %): 14,76 ft / 4,50 m

- Quarterdeck (15 %): 14,76 ft / 4,50 m

- Stern: 14,76 ft / 4,50 m

- Average freeboard: 15,16 ft / 4,62 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 167,1 %

- Above water (accommodation/working, high = better): 132,9 %

Waterplane Area: 8 273 Square feet or 769 Square metres

Displacement factor (Displacement / loading): 77 %

Structure weight / hull surface area: 46 lbs/sq ft or 225 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 0,63

- Longitudinal: 2,11

- Overall: 0,71

Hull space for machinery, storage, compartmentation is cramped

Room for accommodation and workspaces is excellent

Ship has slow, easy roll, a good, steady gun platform

To make it more obvious

This post has been edited 1 times, last edit by "Vukovlad" (Apr 19th 2008, 9:16pm)

## Quoted

Originally posted by Vukovlad

Main Belt covers 154 % of normal length

Main belt does not fully cover magazines and engineering spaces

Space - Hull below water (magazines/engines, low = better): 167,1 %

These two statements are related, I think. Make the hull wider, which lets you get more of the equipment and stuff under the waterline. Should help.

What do you mean by "construction warning"? Something like, "If you build it, it will go up like a Fillopine candle"?

And Brock's right, the reason the belt doesn't cover the machine/magazine spaces is that they are so large on such a narrow hull that they are above the armored deck. Kinda like the boilers on the original Lexington class BCs.

And Brock's right, the reason the belt doesn't cover the machine/magazine spaces is that they are so large on such a narrow hull that they are above the armored deck. Kinda like the boilers on the original Lexington class BCs.

This post has been edited 1 times, last edit by "Sachmle" (Apr 20th 2008, 3:53am)

Generally I interpret it as "my engines don't fit in my ship" and a sign that I need to reduce speed.

One fun and easy way to do this is to take a high speed cruiser design and add a 1mm+ torpedo bulkhead. Since it adds interior voids, it squishes the machinery spaces out of at least the citadel and sometimes the hull. Often the lack of interior room means there is no benefit and sometimes a loss of torpedo resistance.

The % Hull below water is as RA explains, critical stuff sticking up. When one is armoring such a ship, one needs to remember to have a taller belt as a result, beyond protected flotation concerns.

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