Shipbucket

Invincible, Great Britain Armoured Cruiser laid down 1906

Displacement:
15 080 t light; 15 579 t standard; 16 255 t normal; 16 795 t full load

Dimensions: Length overall / water x beam x draught
549,54 ft / 547,90 ft x 75,79 ft x 28,54 ft (normal load)
167,50 m / 167,00 m x 23,10 m x 8,70 m

Armament:
4 - 9,20" / 234 mm guns (2x2 guns), 389,34lbs / 176,60kg shells, 1906 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
4 - 9,20" / 234 mm guns (2x2 guns), 389,34lbs / 176,60kg shells, 1906 Model
Breech loading guns in turrets (on barbettes)
on side, all amidships
16 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1906 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 3 627 lbs / 1 645 kg
Shells per gun, main battery: 80
5 - 18,0" / 457,2 mm submerged torpedo tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6,00" / 152 mm 459,58 ft / 140,08 m 10,45 ft / 3,19 m
Ends: 4,00" / 102 mm 88,30 ft / 26,91 m 10,45 ft / 3,19 m
Upper: 5,00" / 127 mm 459,58 ft / 140,08 m 8,00 ft / 2,44 m
Main Belt covers 129% of normal length

- Torpedo Bulkhead:
2,50" / 64 mm 459,58 ft / 140,08 m 24,53 ft / 7,48 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 7,00" / 178 mm 4,00" / 102 mm 7,00" / 178 mm
2nd: 7,00" / 178 mm 4,00" / 102 mm 7,00" / 178 mm

- Armour deck: 2,50" / 64 mm, Conning tower: 10,00" / 254 mm

Machinery:
Coal fired boilers, steam turbines,
Direct drive, 4 shafts, 48 913 shp / 36 489 Kw = 25,50 kts
Range 3 090nm at 10,00 kts
Bunker at max displacement = 1 215 tons (100% coal)

Complement:
719 - 935

Cost:
£1,398 million / $5,591 million

Distribution of weights at normal displacement:
Armament: 453 tons, 2,8%
Armour: 5 296 tons, 32,6%
- Belts: 2 053 tons, 12,6%
- Torpedo bulkhead: 1 043 tons, 6,4%
- Armament: 805 tons, 5,0%
- Armour Deck: 1 257 tons, 7,7%
- Conning Tower: 138 tons, 0,9%
Machinery: 3 494 tons, 21,5%
Hull, fittings & equipment: 5 836 tons, 35,9%
Fuel, ammunition & stores: 1 175 tons, 7,2%
Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
19 029 lbs / 8 631 Kg = 48,9 x 9,2 " / 234 mm shells or 2,9 torpedoes
Stability (Unstable if below 1.00): 1,18
Metacentric height 4,5 ft / 1,4 m
Roll period: 15,0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0,44
Seaboat quality (Average = 1.00): 1,53

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0,480
Length to Beam Ratio: 7,23 : 1
'Natural speed' for length: 23,41 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 46
Bow angle (Positive = bow angles forward): -5,00 degrees
Stern overhang: 1,64 ft / 0,50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29,20 ft / 8,90 m
- Forecastle (8%): 23,95 ft / 7,30 m
- Mid (69%): 23,95 ft / 7,30 m (16,40 ft / 5,00 m aft of break)
- Quarterdeck (8%): 16,40 ft / 5,00 m
- Stern: 16,40 ft / 5,00 m
- Average freeboard: 21,78 ft / 6,64 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 129,0%
- Above water (accommodation/working, high = better): 157,6%
Waterplane Area: 27 174 Square feet or 2 525 Square metres
Displacement factor (Displacement / loading): 102%
Structure weight / hull surface area: 134 lbs/sq ft or 654 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,94
- Longitudinal: 2,11
- Overall: 1,02
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

ss file for the ship.

Welcome aboard.

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𝐌𝐀𝐓𝐇𝐍𝐄𝐓- 𝑻𝒐 𝑪𝒐𝒈𝒊𝒕𝒂𝒕𝒆 𝒂𝒏𝒅 𝒕𝒐 𝑺𝒐𝒍𝒗𝒆

MarekGutkowski the turrets on you invincible have two guns not one.

Yes they do.
And I was under the impression that I used 9,2'' Mark XI in duals turrets.

In SS report, I put the first battery in two duals in "on centreline ends, evenly spread"
Second battery is also dual 9,2'' on "on side, all amidships"

the ship has 8 9,2'' guns.

The turrets are, in fact, doubles. I think the confusion comes from that they were origianlly drawn for my Agamemnon, which has an unusual side battery of 4 twins and 2 singles.

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Worklist

"If people never did silly things nothing intelligent would ever get done." ~Ludwig Wittgenstein

Its a well done modification but to be honest the 9.2in. turrets looks a bit small for this large of a ship. The design just looks slightly "off" to me with the 9.2in. replacing the 12in. one for one.
It actually may not be under gunned necessarily, since the Invincible class was not designed to be a class of ships of the line but more of a scouting ship that is more powerful than any enemy scout it can face (a super cruiser not a smaller faster battleship). They were designed as more super armored cruisers than battleships. However, if you are referring more to the caliber and number of guns compared to the ships size and not to the power of the weapons themselves, than I do agree the ship is underarmed for its size. Maybe try and make a smaller version of the class combining elements with the British armored cruisers of the time and create a super Minotaur class Invincible class hybrid with an all 9.2in. main battery. (Btw I am no expert on this time period so if I said something incorrect I am sure some of the more esteemed members of this board will correct me

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Projects:
Zealandia AU
John Company AU
References and feedback is always welcome!

The ship can be made smaller.

Take the Minotaur and replace the ten 7,5'' with four 9,2'' weight saved can go to engines.
The ship will need to be longer as it will be faster.

I will start from scratch, and see were will it take me.

There is some ten inch British guns that can be used on the Satsuma and Swiftsure classes.

I was thinking about that but Royal Navy liked to have there guns having twice the shell weight of the smaller gun.
7,5'' had circa half the shell weight of the 9,2'' with in turn had circa half the shell weight of 12''
Making a calibre in between the 9,2'' and the 12'' seems out of character.
Ten inch gun used in the Swiftsure was an Vickers and Elswick made export model build for Chile.

How about the turret arrangement similar to the German Nassau Class?