Aztec Ship Designs 1929-1934

[The Rock Doctor]

The cost per turn is about the same.  You get a bit more bang for the buck with the bigger ship.

So it's kind of a question of whether you need coverage (smaller hulls) or concentration (bigger hulls) right now.

Certainly you can build Connie iterations that are technically one-offs while still ensuring they're completely inter-operable.  It's an approach I had moved to in the final years at Wesworld.

[TacCovert4]

My view is that for the first several years there'd be an inertia about the ships.   The martinique mk2 functionally only adds Catapults for emergency launches and a flush flight deck instead of the two level flight deck.  A major design change wouldn't happen until more testing occurred.   

I'll probably go with the smaller one, the idea being coverage and time to learn from the constellations.

[TacCovert4]

Who knows, by the time we get around to the next iteration of 'big' carrier, I might be looking at a 27,000 tonner with a 2 level armored hangar.

[The Rock Doctor]

Distinctly possible you will.  I've gone up to about 24,000 so far but have not like my armored box outcomes.

[TacCovert4]

Distinctly possible you will.  I've gone up to about 24,000 so far but have not like my armored box outcomes.

I concur.  I tried to duplicate the Implacable, and the cost of the armored box is such that the air group was going to be less than 50 aircraft.  On the same tonnage, an unarmored carrier, single hangar, powerful battery with 100t built in for additional AA at a later date if needed, all the bells and whistles, Flag Facilities and Quarters, and even an expanded maintenance shop for the aircraft, etc etc.....72 aircraft in the hangar and tonnage set aside for 8 deck parked aircraft.

Orion, Aztec Strike Carrier laid down 1934

Displacement:
   26,999 t light; 27,871 t standard; 29,982 t normal; 31,671 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (755.24 ft / 738.19 ft) x 98.43 ft x (26.26 / 27.43 ft)
   (230.20 m / 225.00 m) x 30.00 m  x (8.00 / 8.36 m)

Armament:
      16 - 4.72" / 120 mm 55.0 cal guns - 56.91lbs / 25.81kg shells, 400 per gun
     Dual purpose guns in deck and hoist mounts, 1934 Model
     8 x Twin mounts on sides, evenly spread
      24 - 1.57" / 40.0 mm 50.0 cal guns - 2.07lbs / 0.94kg shells, 2,000 per gun
     Anti-air guns in deck and hoist mounts, 1934 Model
     6 x 4 row quad mounts on sides, evenly spread
      20 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 1,500 per gun
     Anti-air guns in deck mounts, 1934 Model
     14 x Single mounts on side ends, majority forward
     6 x Single mounts on centreline, aft deck aft
      Weight of broadside 978 lbs / 443 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.15" / 80 mm   479.82 ft / 146.25 m   13.12 ft / 4.00 m
   Ends:   1.97" / 50 mm   258.33 ft / 78.74 m   13.12 ft / 4.00 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.57" / 40 mm   479.82 ft / 146.25 m   24.08 ft / 7.34 m
   Beam between torpedo bulkheads 78.74 ft / 24.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.57" / 40 mm   1.57" / 40 mm      1.57" / 40 mm
   2nd:   0.79" / 20 mm   0.79" / 20 mm      0.79" / 20 mm

   - Armoured deck - multiple decks:
   For and Aft decks: 3.94" / 100 mm
   Forecastle: 1.97" / 50 mm  Quarter deck: 1.97" / 50 mm

   - Conning towers: Forward 1.97" / 50 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 125,837 shp / 93,875 Kw = 30.00 kts
   Range 10,000nm at 14.00 kts
   Bunker at max displacement = 3,800 tons

Complement:
   1,139 - 1,481

Cost:
   £7.690 million / $30.762 million

Distribution of weights at normal displacement:
   Armament: 284 tons, 0.9 %
      - Guns: 284 tons, 0.9 %
   Armour: 5,299 tons, 17.7 %
      - Belts: 1,090 tons, 3.6 %
      - Torpedo bulkhead: 673 tons, 2.2 %
      - Armament: 118 tons, 0.4 %
      - Armour Deck: 3,377 tons, 11.3 %
      - Conning Tower: 41 tons, 0.1 %
   Machinery: 3,620 tons, 12.1 %
   Hull, fittings & equipment: 9,338 tons, 31.1 %
   Fuel, ammunition & stores: 2,983 tons, 9.9 %
   Miscellaneous weights: 8,458 tons, 28.2 %
      - Hull below water: 4,000 tons
      - Hull above water: 4,000 tons
      - On freeboard deck: 220 tons
      - Above deck: 238 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     60,004 lbs / 27,217 Kg = 1,138.1 x 4.7 " / 120 mm shells or 7.9 torpedoes
   Stability (Unstable if below 1.00): 1.46
   Metacentric height 9.4 ft / 2.9 m
   Roll period: 13.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.05
   Seaboat quality  (Average = 1.00): 1.66

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.556
   Length to Beam Ratio: 7.50 : 1
   'Natural speed' for length: 27.17 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 42
   Bow angle (Positive = bow angles forward): 30.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Forward deck:   30.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Aft deck:   35.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Quarter deck:   15.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Average freeboard:      29.53 ft / 9.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 91.4 %
      - Above water (accommodation/working, high = better): 250.4 %
   Waterplane Area: 50,706 Square feet or 4,711 Square metres
   Displacement factor (Displacement / loading): 136 %
   Structure weight / hull surface area: 127 lbs/sq ft or 620 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.48
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

28t - 1930 FC
50t - NF Devices x 2
25t - LR Radio
10t - Additional SR Radio
100t - Flag Facilities
25t - Builder Reserve

20t - 4 x Catapult on Deck
100t - Additional Firefighting Equipment
100t - Builder Reserve

100t - Firefighting Equipment in Hangar
100t - Flag Quarters
3420t - Aircraft (72 Total)

100t - Additional Damage Control Equipment
100t - Aviation Repair Shop
3420 - Aircraft Support (72 Total)

760t - Additional Aircraft and support space for deck parking of up to 8 additional aircraft

Deck is 70mm Hangar Floor, with 30mm Splinter above Magazines and Machinery

[TacCovert4]

What I'm leaning towards in 1932 is a pair of experimental ships.  A Mk2 of the Martinique, with the 'kinks' worked out but a roundly similar airgroup and updates but nothing ground-breaking.  The Constellations will be working up and involved in fleet exercises, so no Mk2 of the Constellations until they've had some sea time.  Instead, only a single Mk2 Martinique will be laid down, concurrent with a 'through deck cruiser' of the Condor Class, which is experimenting with combination ships for providing scouts and fighters for the fleet screen or engaging in independent cruiser operations while having aircraft for self defense or limited strike.  Basically the 16 aircraft flight group could be 16 fighters for the fleet screen CAP....or a split with bombing aircraft as an 'independent aviation cruiser' role.

Condor-Class, Aztec Through-Deck Cruiser laid down 1932

Displacement:
   12,526 t light; 13,029 t standard; 14,391 t normal; 15,481 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (646.33 ft / 639.76 ft) x 70.54 ft x (20.67 / 21.89 ft)
   (197.00 m / 195.00 m) x 21.50 m  x (6.30 / 6.67 m)

Armament:
      6 - 7.09" / 180 mm 50.0 cal guns - 188.38lbs / 85.45kg shells, 200 per gun
     Quick firing guns in turret on barbette mounts, 1932 Model
     2 x 3-gun mounts on centreline, forward evenly spread
      12 - 3.54" / 90.0 mm 55.0 cal guns - 24.01lbs / 10.89kg shells, 265 per gun
     Dual purpose guns in deck mounts, 1932 Model
     4 x Twin mounts on sides, aft evenly spread
     2 x Twin mounts on sides, forward deck aft
      8 - 1.57" / 40.0 mm 55.0 cal guns - 2.11lbs / 0.96kg shells, 4,000 per gun
     Anti-air guns in deck and hoist mounts, 1932 Model
     2 x 4 row quad mounts on sides, aft deck forward
      20 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1932 Model
     10 x Single mounts on sides, evenly spread
      Weight of broadside 1,453 lbs / 659 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   435.04 ft / 132.60 m   11.48 ft / 3.50 m
   Ends:   Unarmoured
     Main Belt covers 105 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   435.04 ft / 132.60 m   18.83 ft / 5.74 m
   Beam between torpedo bulkheads 54.13 ft / 16.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4.72" / 120 mm   3.15" / 80 mm      3.94" / 100 mm
   2nd:   2.36" / 60 mm   1.38" / 35 mm            -
   3rd:   0.98" / 25 mm   0.98" / 25 mm      0.98" / 25 mm
   4th:   0.98" / 25 mm         -         0.98" / 25 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.36" / 60 mm

   - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 81,864 shp / 61,070 Kw = 30.00 kts
   Range 10,000nm at 14.00 kts
   Bunker at max displacement = 2,452 tons

Complement:
   656 - 854

Cost:
   £4.171 million / $16.684 million

Distribution of weights at normal displacement:
   Armament: 428 tons, 3.0 %
      - Guns: 428 tons, 3.0 %
   Armour: 2,639 tons, 18.3 %
      - Belts: 809 tons, 5.6 %
      - Torpedo bulkhead: 358 tons, 2.5 %
      - Armament: 274 tons, 1.9 %
      - Armour Deck: 1,149 tons, 8.0 %
      - Conning Tower: 50 tons, 0.3 %
   Machinery: 2,416 tons, 16.8 %
   Hull, fittings & equipment: 5,309 tons, 36.9 %
   Fuel, ammunition & stores: 1,865 tons, 13.0 %
   Miscellaneous weights: 1,733 tons, 12.0 %
      - Hull below water: 790 tons
      - Hull above water: 790 tons
      - On freeboard deck: 50 tons
      - Above deck: 103 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     28,367 lbs / 12,867 Kg = 159.4 x 7.1 " / 180 mm shells or 3.8 torpedoes
   Stability (Unstable if below 1.00): 1.28
   Metacentric height 4.6 ft / 1.4 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.24
   Seaboat quality  (Average = 1.00): 1.84

Hull form characteristics:
   Hull has rise aft of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.540 / 0.548
   Length to Beam Ratio: 9.07 : 1
   'Natural speed' for length: 25.29 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 38
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   18.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
      - Forward deck:   30.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
      - Aft deck:   38.00 %,  34.45 ft / 10.50 m,  34.45 ft / 10.50 m
      - Quarter deck:   14.00 %,  34.45 ft / 10.50 m,  34.45 ft / 10.50 m
      - Average freeboard:      26.57 ft / 8.10 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 100.2 %
      - Above water (accommodation/working, high = better): 246.5 %
   Waterplane Area: 31,201 Square feet or 2,899 Square metres
   Displacement factor (Displacement / loading): 136 %
   Structure weight / hull surface area: 107 lbs/sq ft or 523 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 1.98
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather


AD
25t - LR Wireless
25t - NF Devices
43t - 1918 FC
10t - Additional SR Radio


OD
20t - 4 x Catapult (On Sides of Deck)
30t - Additional Firefighting Equipment on the Flight Deck

AW
30t - Additional Firefighting Equipment in Hangar
760t - Aviation (Total Flight Group 16 Aircraft, 1933 Tech Compatible)

BW
30t - Additional DC Equipment and Pumps
760t - Aviation Support

[The Rock Doctor]

Can you raise the stem enough to get rid of the wet forward warning?

[TacCovert4]

Can you raise the stem enough to get rid of the wet forward warning?

Unfortunately not.  I've tested the bow all the way up to 8m, and it's still throwing that.  It's just going to be one of the quirks of a combination cruiser, it's going to have some wash problems in heavy seas at high speeds.

[TacCovert4]

And looking back at smaller cruisers for general purpose work.  As a proper deck and belt are a bit beyond the abilities to get it under 6000t with an 8 gun main battery, sufficient secondary, torpedoes, and a scout plane.....I've gone with a 50mm magazine box backing the deck and belt to preclude hits from being catastrophic.  I'll work up a version with a 6 gun battery (a la Arethusa) to see how much more can be crammed on.

Shark-Class, Aztec Corvette laid down 1932

Displacement:
   5,917 t light; 6,283 t standard; 6,814 t normal; 7,238 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (488.44 ft / 482.28 ft) x 59.06 ft x (15.42 / 16.17 ft)
   (148.88 m / 147.00 m) x 18.00 m  x (4.70 / 4.93 m)

Armament:
      8 - 7.09" / 180 mm 50.0 cal guns - 188.38lbs / 85.45kg shells, 160 per gun
     Quick firing guns in deck and hoist mounts, 1932 Model
     4 x Twin mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      8 - 3.54" / 90.0 mm 55.0 cal guns - 24.01lbs / 10.89kg shells, 400 per gun
     Dual purpose guns in deck mounts, 1932 Model
     4 x Twin mounts on sides, evenly spread
      8 - 1.57" / 40.0 mm 55.0 cal guns - 2.11lbs / 0.96kg shells, 4,000 per gun
     Anti-air guns in deck mounts, 1932 Model
     2 x 4 row quad mounts on centreline ends, evenly spread
      2 double raised mounts
      16 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 2,000 per gun
     Anti-air guns in deck mounts, 1932 Model
     16 x Single mounts on side ends, evenly spread
      Weight of broadside 1,730 lbs / 785 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.76" / 70 mm   347.24 ft / 105.84 m   9.84 ft / 3.00 m
   Ends:   Unarmoured
     Main Belt covers 111 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.76" / 70 mm   1.77" / 45 mm      2.76" / 70 mm
   2nd:   1.97" / 50 mm   1.02" / 26 mm            -
   3rd:   0.79" / 20 mm   0.79" / 20 mm      0.79" / 20 mm

   - Armoured deck - single deck:
   For and Aft decks: 1.38" / 35 mm

   - Conning towers: Forward 2.95" / 75 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 59,380 shp / 44,297 Kw = 30.00 kts
   Range 6,000nm at 14.00 kts
   Bunker at max displacement = 956 tons

Complement:
   374 - 487

Cost:
   £2.836 million / $11.344 million

Distribution of weights at normal displacement:
   Armament: 402 tons, 5.9 %
      - Guns: 402 tons, 5.9 %
   Armour: 962 tons, 14.1 %
      - Belts: 389 tons, 5.7 %
      - Armament: 111 tons, 1.6 %
      - Armour Deck: 440 tons, 6.5 %
      - Conning Tower: 23 tons, 0.3 %
   Machinery: 1,753 tons, 25.7 %
   Hull, fittings & equipment: 2,527 tons, 37.1 %
   Fuel, ammunition & stores: 897 tons, 13.2 %
   Miscellaneous weights: 273 tons, 4.0 %
      - Hull below water: 61 tons
      - Hull above water: 60 tons
      - On freeboard deck: 82 tons
      - Above deck: 70 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,982 lbs / 3,167 Kg = 39.2 x 7.1 " / 180 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.09
   Metacentric height 2.7 ft / 0.8 m
   Roll period: 15.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.64
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.543 / 0.550
   Length to Beam Ratio: 8.17 : 1
   'Natural speed' for length: 21.96 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 68
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   18.00 %,  22.97 ft / 7.00 m,  21.33 ft / 6.50 m
      - Forward deck:   30.00 %,  21.33 ft / 6.50 m,  19.69 ft / 6.00 m
      - Aft deck:   42.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Quarter deck:   10.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Average freeboard:      20.34 ft / 6.20 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 110.1 %
      - Above water (accommodation/working, high = better): 201.4 %
   Waterplane Area: 19,747 Square feet or 1,835 Square metres
   Displacement factor (Displacement / loading): 107 %
   Structure weight / hull surface area: 90 lbs/sq ft or 437 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.83
      - Longitudinal: 1.74
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform


25t - LR Radio
25t - NF Devices
39t - 1918 FC
32t - 2 x 5 x 21in HW TT on sides aft
60t - Electric T&E for Main Battery

61t - 50mm Box over Magazines

25t - 1 x Armed Floatplane Amidships
5t - Catapult

[TacCovert4]

Alternatively, better protected, 2 fewer main guns, roughly the same everything else.

Shark, Aztec Corvette laid down 1932

Displacement:
   5,483 t light; 5,821 t standard; 6,661 t normal; 7,333 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (498.28 ft / 492.13 ft) x 52.49 ft x (17.03 / 18.36 ft)
   (151.88 m / 150.00 m) x 16.00 m  x (5.19 / 5.60 m)

Armament:
      6 - 7.09" / 180 mm 50.0 cal guns - 188.38lbs / 85.45kg shells, 150 per gun
     Quick firing guns in deck and hoist mounts, 1932 Model
     3 x Twin mounts on centreline ends, majority forward
      1 raised mount - superfiring
      8 - 3.54" / 90.0 mm 55.0 cal guns - 24.01lbs / 10.89kg shells, 400 per gun
     Dual purpose guns in deck mounts, 1932 Model
     4 x Twin mounts on sides, evenly spread
      12 - 1.57" / 40.0 mm 55.0 cal guns - 2.11lbs / 0.96kg shells, 4,000 per gun
     Anti-air guns in deck and hoist mounts, 1932 Model
     2 x 4 row quad mounts on sides, forward deck aft
     1 x 4 row quad mount on centreline, aft deck centre
      1 raised mount
      12 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 2,000 per gun
     Anti-air guns in deck mounts, 1932 Model
     16 x Single mounts on side ends, evenly spread
      Weight of broadside 1,358 lbs / 616 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.56" / 65 mm   344.49 ft / 105.00 m   9.84 ft / 3.00 m
   Ends:   Unarmoured
     Main Belt covers 108 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   3.54" / 90 mm   1.97" / 50 mm      3.54" / 90 mm
   2nd:   1.97" / 50 mm   0.98" / 25 mm            -
   3rd:   0.79" / 20 mm   0.79" / 20 mm      0.79" / 20 mm

   - Box over machinery & magazines:
   1.97" / 50 mm

   - Conning towers: Forward 3.15" / 80 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 56,005 shp / 41,780 Kw = 30.00 kts
   Range 10,000nm at 14.00 kts
   Bunker at max displacement = 1,513 tons

Complement:
   368 - 479

Cost:
   £2.535 million / $10.140 million

Distribution of weights at normal displacement:
   Armament: 318 tons, 4.8 %
      - Guns: 318 tons, 4.8 %
   Armour: 1,168 tons, 17.5 %
      - Belts: 355 tons, 5.3 %
      - Armament: 104 tons, 1.6 %
      - Armour Deck: 686 tons, 10.3 %
      - Conning Tower: 24 tons, 0.4 %
   Machinery: 1,653 tons, 24.8 %
   Hull, fittings & equipment: 2,154 tons, 32.3 %
   Fuel, ammunition & stores: 1,178 tons, 17.7 %
   Miscellaneous weights: 189 tons, 2.8 %
      - Hull above water: 46 tons
      - On freeboard deck: 77 tons
      - Above deck: 66 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,890 lbs / 3,125 Kg = 38.7 x 7.1 " / 180 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.07
   Metacentric height 2.2 ft / 0.7 m
   Roll period: 14.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.60
   Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.530 / 0.541
   Length to Beam Ratio: 9.38 : 1
   'Natural speed' for length: 22.18 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  22.97 ft / 7.00 m,  19.69 ft / 6.00 m
      - Forward deck:   30.00 %,  19.69 ft / 6.00 m,  16.40 ft / 5.00 m
      - Aft deck:   40.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Quarter deck:   10.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Average freeboard:      17.81 ft / 5.43 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.7 %
      - Above water (accommodation/working, high = better): 156.7 %
   Waterplane Area: 17,695 Square feet or 1,644 Square metres
   Displacement factor (Displacement / loading): 112 %
   Structure weight / hull surface area: 82 lbs/sq ft or 398 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.86
      - Longitudinal: 1.39
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform


32t - 2 x 4 x 21in HW TT on Sides Aft
32t - 1918 FC
25t - LR Radio
25t - NF Devices
30t - 1 x Armed Floatplane and Catapult Amidships betwixt funnels
45t - Additional Powered T&E for Main Battery

[The Rock Doctor]

If you go with six guns on the original 5,900 t hull, what can you do with the rest of the parameters?

[Jefgte]

If you go with six guns on the original 5,900 t hull, what can you do with the rest of the parameters?

=> A kind of Tone - Chikuma

;)

[TacCovert4]

Pulling that turret lets me beef up the armored deck to something functional, and the belt to 90mm, plus heavier armor on the main battery....and a 2nd floatplane scout.  Alternative to the floatplane is adding 3mm to the armored deck.

Town-Class, Aztec Corvette laid down 1932

Displacement:
   5,950 t light; 6,283 t standard; 6,814 t normal; 7,238 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (488.44 ft / 482.28 ft) x 59.06 ft x (15.42 / 16.17 ft)
   (148.88 m / 147.00 m) x 18.00 m  x (4.70 / 4.93 m)

Armament:
      6 - 7.09" / 180 mm 50.0 cal guns - 188.39lbs / 85.45kg shells, 160 per gun
     Quick firing guns in deck and hoist mounts, 1932 Model
     3 x Twin mounts on centreline ends, majority forward
      1 raised mount - superfiring
      8 - 3.54" / 90.0 mm 55.0 cal guns - 24.01lbs / 10.89kg shells, 400 per gun
     Dual purpose guns in deck mounts, 1932 Model
     4 x Twin mounts on sides, evenly spread
      8 - 1.57" / 40.0 mm 55.0 cal guns - 2.12lbs / 0.96kg shells, 4,000 per gun
     Anti-air guns in deck mounts, 1932 Model
     1 x 4 row quad mount on centreline, aft deck centre
      1 raised mount
     1 x 4 row quad mount on centreline, forward deck centre
      1 double raised mount
      16 - 1.18" / 30.0 mm 50.0 cal guns - 0.86lbs / 0.39kg shells, 2,000 per gun
     Anti-air guns in deck mounts, 1932 Model
     16 x Single mounts on side ends, evenly spread
      Weight of broadside 1,353 lbs / 614 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.54" / 90 mm   347.24 ft / 105.84 m   9.84 ft / 3.00 m
   Ends:   Unarmoured
     Main Belt covers 111 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   3.94" / 100 mm   1.97" / 50 mm      3.54" / 90 mm
   2nd:   1.97" / 50 mm   1.02" / 26 mm            -
   3rd:   0.79" / 20 mm   0.79" / 20 mm      0.79" / 20 mm

   - Armoured deck - single deck:
   For and Aft decks: 1.85" / 47 mm

   - Conning towers: Forward 3.54" / 90 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 59,380 shp / 44,297 Kw = 30.00 kts
   Range 6,000nm at 14.00 kts
   Bunker at max displacement = 956 tons

Complement:
   374 - 487

Cost:
   £2.662 million / $10.649 million

Distribution of weights at normal displacement:
   Armament: 313 tons, 4.6 %
      - Guns: 313 tons, 4.6 %
   Armour: 1,220 tons, 17.9 %
      - Belts: 500 tons, 7.3 %
      - Armament: 102 tons, 1.5 %
      - Armour Deck: 591 tons, 8.7 %
      - Conning Tower: 27 tons, 0.4 %
   Machinery: 1,753 tons, 25.7 %
   Hull, fittings & equipment: 2,446 tons, 35.9 %
   Fuel, ammunition & stores: 863 tons, 12.7 %
   Miscellaneous weights: 218 tons, 3.2 %
      - Hull above water: 45 tons
      - On freeboard deck: 107 tons
      - Above deck: 66 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,063 lbs / 3,657 Kg = 45.3 x 7.1 " / 180 mm shells or 1.3 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 2.9 ft / 0.9 m
   Roll period: 14.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.45
   Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.543 / 0.550
   Length to Beam Ratio: 8.17 : 1
   'Natural speed' for length: 21.96 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   18.00 %,  22.97 ft / 7.00 m,  21.33 ft / 6.50 m
      - Forward deck:   30.00 %,  21.33 ft / 6.50 m,  19.69 ft / 6.00 m
      - Aft deck:   42.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Quarter deck:   10.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Average freeboard:      20.34 ft / 6.20 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 103.7 %
      - Above water (accommodation/working, high = better): 201.4 %
   Waterplane Area: 19,747 Square feet or 1,835 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 86 lbs/sq ft or 418 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 1.72
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform


25t - LR Radio
25t - NF Devices
31t - 1918 FC
32t - 2 x 5 x 21in HW TT on sides aft
45t - Electric T&E for Main Battery

50t - 2 x Armed Floatplane Amidships
10t - 2 x Catapult

[The Rock Doctor]

That's not a bad trade-defence cruiser.  Got the gunnery and armor to take on AMCs and other CLs, couple planes to look for trouble, etc.

[TacCovert4]

I will probably go with one of the 6 gun options.   For cost savings purposes. The improvements in fire control somewhat alleviate the issues with a smaller spotting ladder.  And for general patrol purposes the main battery isn't quite as important.