Grays Harbor Designs

[Kilomuse]

Great looking cruiser. I'm not too familiar with ships of the era, but that looks like quite a respectable broadside.

[Zephyr]

Changes made. And yes, the steam pinnace is carried on the port side.



Ajax, Grays Harbor Armoured Cruiser laid down 1907

Displacement:
13,799 t light; 14,410 t standard; 15,720 t normal; 16,767 t full load

Dimensions: Length overall / water x beam x draught
499.00 ft / 494.00 ft x 75.00 ft x 27.00 ft (normal load)
152.10 m / 150.57 m x 22.86 m x 8.23 m

Armament:
6 - 9.20" / 234 mm guns (3x2 guns), 389.34lbs / 176.60kg shells, 1907 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1907 Model
Breech loading guns in turrets (on barbettes)
on side, all amidships
10 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1907 Model
Quick firing guns in deck mounts
on side, evenly spread, 6 raised mounts
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1907 Model
Quick firing guns in casemate mounts
on side, all aft
2 guns in hull casemates - Limited use in all but light seas
Weight of broadside 3,362 lbs / 1,525 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 368.00 ft / 112.17 m 16.00 ft / 4.88 m
Ends: 3.00" / 76 mm 60.00 ft / 18.29 m 12.00 ft / 3.66 m
66.00 ft / 20.12 m Unarmoured ends
Main Belt covers 115 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.00" / 203 mm 5.00" / 127 mm 8.00" / 203 mm
2nd: 5.00" / 127 mm 3.00" / 76 mm 5.00" / 127 mm
3rd: 1.00" / 25 mm - -
4th: 3.00" / 76 mm - -

- Armour deck: 3.00" / 76 mm, Conning tower: 10.00" / 254 mm

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 3 shafts, 40,729 ihp / 30,384 Kw = 24.00 kts
Range 8,000nm at 10.00 kts
Bunker at max displacement = 2,357 tons (100% coal)

Complement:
701 - 912

Cost:
£1.470 million / $5.878 million

Distribution of weights at normal displacement:
Armament: 420 tons, 2.7 %
Armour: 4,199 tons, 26.7 %
- Belts: 1,570 tons, 10.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1,059 tons, 6.7 %
- Armour Deck: 1,435 tons, 9.1 %
- Conning Tower: 135 tons, 0.9 %
Machinery: 4,525 tons, 28.8 %
Hull, fittings & equipment: 4,655 tons, 29.6 %
Fuel, ammunition & stores: 1,921 tons, 12.2 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
11,472 lbs / 5,204 Kg = 29.5 x 9.2 " / 234 mm shells or 1.6 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 4.6 ft / 1.4 m
Roll period: 14.7 seconds
Steadiness - As gun platform (Average = 50 %): 61 %
- Recoil effect (Restricted arc if above 1.00): 0.30
Seaboat quality (Average = 1.00): 1.22

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.550
Length to Beam Ratio: 6.59 : 1
'Natural speed' for length: 22.23 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.13 degrees
Stern overhang: -3.00 ft / -0.91 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.00 ft / 8.53 m
- Forecastle (23 %): 27.00 ft / 8.23 m (26.00 ft / 7.92 m aft of break)
- Mid (45 %): 13.50 ft / 4.11 m
- Quarterdeck (22 %): 13.50 ft / 4.11 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 18.13 ft / 5.53 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 114.2 %
- Above water (accommodation/working, high = better): 112.4 %
Waterplane Area: 25,857 Square feet or 2,402 Square metres
Displacement factor (Displacement / loading): 95 %
Structure weight / hull surface area: 120 lbs/sq ft or 586 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.68
- Overall: 0.99
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily

[bezobrazov]

I cannot see it!

[eltf177]

I like Ajax, although the "strained hull" rating worries me...

[Blackbuck]

It looks like at least for the report that it would only require minor surgery to fix that particular issue... That said it is a damn fine looking ship.

[eltf177]

It looks like at least for the report that it would only require minor surgery to fix that particular issue... That said it is a damn fine looking ship.

I didn't even notice, 0.99! Yea, add those extra few tons and she's golden!

[Zephyr]

added a few feet to the beam, and changed the block coefficient some and this is what came up:

Ajax, Grays Harbor Armoured Cruiser laid down 1907

Displacement:
15,338 t light; 15,982 t standard; 17,370 t normal; 18,480 t full load

Dimensions: Length overall / water x beam x draught
499.00 ft / 494.00 ft x 86.00 ft x 27.00 ft (normal load)
152.10 m / 150.57 m x 26.21 m x 8.23 m

Armament:
6 - 9.20" / 234 mm guns (3x2 guns), 389.34lbs / 176.60kg shells, 1907 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority aft, 1 raised mount aft - superfiring
8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1907 Model
Breech loading guns in turrets (on barbettes)
on side, all amidships
10 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1907 Model
Quick firing guns in deck mounts
on side, evenly spread, 6 raised mounts
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1907 Model
Quick firing guns in casemate mounts
on side, all aft
2 guns in hull casemates - Limited use in all but light seas
Weight of broadside 3,362 lbs / 1,525 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 368.00 ft / 112.17 m 16.00 ft / 4.88 m
Ends: 3.00" / 76 mm 60.00 ft / 18.29 m 12.00 ft / 3.66 m
66.00 ft / 20.12 m Unarmoured ends
Main Belt covers 115 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.00" / 203 mm 5.00" / 127 mm 8.00" / 203 mm
2nd: 5.00" / 127 mm 3.00" / 76 mm 5.00" / 127 mm
3rd: 1.00" / 25 mm - -
4th: 3.00" / 76 mm - -

- Armour deck: 3.00" / 76 mm, Conning tower: 10.00" / 254 mm

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 3 shafts, 43,815 ihp / 32,686 Kw = 24.00 kts
Range 8,000nm at 10.00 kts
Bunker at max displacement = 2,498 tons (100% coal)

Complement:
756 - 983

Cost:
£1.571 million / $6.286 million

Distribution of weights at normal displacement:
Armament: 420 tons, 2.4 %
Armour: 4,400 tons, 25.3 %
- Belts: 1,582 tons, 9.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1,059 tons, 6.1 %
- Armour Deck: 1,615 tons, 9.3 %
- Conning Tower: 144 tons, 0.8 %
Machinery: 4,868 tons, 28.0 %
Hull, fittings & equipment: 5,649 tons, 32.5 %
Fuel, ammunition & stores: 2,032 tons, 11.7 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,532 lbs / 6,592 Kg = 37.3 x 9.2 " / 234 mm shells or 1.9 torpedoes
Stability (Unstable if below 1.00): 1.31
Metacentric height 6.4 ft / 2.0 m
Roll period: 14.2 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.18
Seaboat quality (Average = 1.00): 1.21

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.530
Length to Beam Ratio: 5.74 : 1
'Natural speed' for length: 22.23 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.13 degrees
Stern overhang: -3.00 ft / -0.91 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.00 ft / 8.53 m
- Forecastle (23 %): 27.00 ft / 8.23 m (26.00 ft / 7.92 m aft of break)
- Mid (45 %): 13.50 ft / 4.11 m
- Quarterdeck (22 %): 13.50 ft / 4.11 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 18.13 ft / 5.53 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 109.9 %
- Above water (accommodation/working, high = better): 117.3 %
Waterplane Area: 29,100 Square feet or 2,703 Square metres
Displacement factor (Displacement / loading): 99 %
Structure weight / hull surface area: 137 lbs/sq ft or 670 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.02
- Longitudinal: 1.89
- Overall: 1.08
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily

[eltf177]

Works for me.

One slight nitpick, you've got the superfiring turret forward instead of aft.

[Zephyr]

Sorry for my protracted absence. It appears that, as suspected, I have the attention span of a senile squirrel.

Anyhow, I was fiddling with, among other things, an aicraft carrier from the late 20's - early 30's and I was trying to figure out a reasonable airgroup for it ... which led me to working out ALL my aircraft for the navy ... which led (somehow) to figuring out ALL my aircraft for my air force (which has kept me occupied for the past week or so) ... then toss in to the mix the latest Honor Harrington book "Shadow of Freedom", and the final Wheel of Time book "A Memory of Light", and new seasons for Doctor Who and Game of Thrones ... and the new series Vikings ... o.O ... anyhow, I'll get back to ships again soonish.

[Zephyr]

Well, it seems that my "soonish" isn't quite what I thought it might be.

Anyhow, getting back into things, .... an aircraft carrier. Still a WIP.



Based on the Sentinel Class BC hull, the backstory being that the Admiralty, after authorizing 4 new BC's later decided they didn't really need them as modern BB's could do everything a BC could do, and with better armour. So, they finished the first as a BC as it was already quite far along, the next two were converted to CV's and the 4th was never completed, being expended as a harbor breakwater after the war.