Grays Harbor Designs

[Novice]

Nice little cruiser. One remark concerns the propellers, which are too modern for a ship like this one.

[Zephyr]

The 'Emergency Cruiser' is a handsome little lady indeed.
Would be very interested in seeing the Springsharp for her!!!

well, it just so happens I did one for each of the seperate classes as I was drawing them. I find it really helps me when determining displacement, speed, machinery and the like.


Illustrious , Grays Harbor Cruiser laid down 1914

Displacement:
3,016 t light; 3,159 t standard; 3,435 t normal; 3,657 t full load

Dimensions: Length overall / water x beam x draught
450.00 ft / 444.00 ft x 42.00 ft x 16.00 ft (normal load)
137.16 m / 135.33 m x 12.80 m x 4.88 m

Armament:
2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1914 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread, all raised mounts
8 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1914 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 472 lbs / 214 kg
Shells per gun, main battery: 250

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 255.00 ft / 77.72 m 10.00 ft / 3.05 m
Ends: 1.00" / 25 mm 163.00 ft / 49.68 m 8.00 ft / 2.44 m
26.00 ft / 7.92 m Unarmoured ends
Main Belt covers 88 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.50" / 38 mm - -
2nd: 1.00" / 25 mm - -

- Armour deck: 1.00" / 25 mm, Conning tower: 1.00" / 25 mm

Machinery:
Oil fired boilers, complex reciprocating steam engines,
Geared drive, 2 shafts, 27,209 ihp / 20,298 Kw = 29.00 kts
Range 6,200nm at 10.00 kts
Bunker at max displacement = 498 tons

Complement:
223 - 291

Cost:
£0.467 million / $1.867 million

Distribution of weights at normal displacement:
Armament: 59 tons, 1.7 %
Armour: 623 tons, 18.1 %
- Belts: 369 tons, 10.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 28 tons, 0.8 %
- Armour Deck: 221 tons, 6.4 %
- Conning Tower: 5 tons, 0.1 %
Machinery: 1,512 tons, 44.0 %
Hull, fittings & equipment: 822 tons, 23.9 %
Fuel, ammunition & stores: 420 tons, 12.2 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,264 lbs / 574 Kg = 11.7 x 6.0 " / 152 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.56
Metacentric height 2.9 ft / 0.9 m
Roll period: 10.4 seconds
Steadiness - As gun platform (Average = 50 %): 77 %
- Recoil effect (Restricted arc if above 1.00): 0.16
Seaboat quality (Average = 1.00): 1.54

Hull form characteristics:
Hull has raised forecastle, rise forward of midbreak
and transom stern
Block coefficient: 0.403
Length to Beam Ratio: 10.57 : 1
'Natural speed' for length: 24.25 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 11.50 degrees
Stern overhang: -2.00 ft / -0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.50 ft / 8.99 m
- Forecastle (19 %): 22.00 ft / 6.71 m (21.00 ft / 6.40 m aft of break)
- Mid (34 %): 20.00 ft / 6.10 m (12.00 ft / 3.66 m aft of break)
- Quarterdeck (16 %): 11.50 ft / 3.51 m
- Stern: 12.00 ft / 3.66 m
- Average freeboard: 15.58 ft / 4.75 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 156.5 %
- Above water (accommodation/working, high = better): 140.4 %
Waterplane Area: 11,934 Square feet or 1,109 Square metres
Displacement factor (Displacement / loading): 79 %
Structure weight / hull surface area: 39 lbs/sq ft or 192 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.57
- Longitudinal: 1.09
- Overall: 0.61
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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Zephyr]

Nice little cruiser. One remark concerns the propellers, which are too modern for a ship like this one.

Hnh. The heck you say. Phooey. I must admit that I am guilty of just grabbing an appropriately sized prop off the parts sheet in this case. Not so good at drawing them myself just as yet. I'll have to go take a look at some drawing of contemporaries of this class in the Real section and see what I ought have instead.

[Novice]

For comparable ships look in the United Kingdom of Real life. The C class cruisers were of similar size, length wise, and you can grab one of their propellers.

[Zephyr]

For comparable ships look in the United Kingdom of Real life. The C class cruisers were of similar size, length wise, and you can grab one of their propellers.

Yup, I did just that already earlier this afternoon shortly after you pointed the props out to me, so this must be a case of "great minds think alike" eh?

I kinda based the idea for this class on the C's, but damn, I didn't realize just how close to them I had gotten until I compared the drawing of the Caroline to my own Illustrious.

A question now. I used a central crane for the boats, but on the C's I saw where they use individual boat davits. Any opinion on which way I should go with this? Keep the crane and stacked boats, or replace that with davited smaller boats? I rather like the way the boat crane looks, but I'm willing to listen to another perspective on it.

[Zephyr]

Drawings of the W.E. cruisers updated

[Zephyr]

Just fiddling around, and thought about this for the 1931-32 rebuild/re-arm of the Bonaventure. I decided to try for an "experimental" armament mix, inspired by the Kitakame and Oi. Only the Bonaventure was re-armed this way. Her sister ship, the Avenger, was rearmed identical to how the Tempest Class was rebuilt, as A/A cruisers in 1934-35.


Armament:
3 x 4.7" (3 x 1)
14 x 40mm/2 Pdr (2 x 4; 3 x 2)
40 x 21" Torpedo (10 x 4)

[eltf177]

If only Bonadventure had been at Java Sea...

[Clonecommander6454]

Looks like a nice design, but that is seriously a heck load of TTs

[APDAF]

Should have renamed her HMS Battleships bane.