WesWorld

With Brazil's navy regaining strength once again, the Imperial Navy's thought has turned once again to naval aviation. Although Brazil had planned to build a carrier, this along with other plans had been nullified by the South American War. Although the Brazilians had begun training a squadron on the Chilean carrier Mapuche in late 1936, and had recently been loaned the Mexican carrier Cinco de Mayo the Imperial Navy decided in 1938 it was time to build a carrier of its own. It must be mentioned that this was mainly at the time due to prestige reasons. Similar to the battleship building frenzy that had undertaken the South American nations at the beginning of the 20th century, Brazil quite simply did not wish to be the only nation in South America not a member of the "flat-top club." Interestingly enough, the Imperial Navy had requested a naval fighter and bomber from Sienar Fleet Systems of Rio, and had designed and tested two aircraft for production, the Sienar V-31 and the Sienar V-19. Therefore, the Imperial Navy was in the interesting position of having carrier aircraft but no carrier.

Realizing that their own shipbuilding/design capability was not up to the task of designing and constructing a carrier, they made a tender for a carrier. This was to be similar in concept to the Chilean Mapuche being able to act as a training carrier in peacetime, while in wartime her role would be as a scout/attack carrier working with the Brazilian cruiser squadrons. Therefore the following requirements were set:
Speed: 33 knots
Armament: the Brazilian 120mm, 37mm, and 13.2mm for ease of logistics.
Maximum size: 804ft long, being the maximum length drydock currently in Brazil, as well as no more than 15,000 tons (note for expense purposes the smaller the better while still being able to fulfil the other requirements)
Number of aircraft: 3 squadrons worth or 36 planes if possible room for spares for an additional squadron.
As well the applicant for the tender must be able to construct the carrier in their own dockyard.

Atlantis has a few questions before submiting a bid.

Is the 15,000 ton limit in standard or light tons?
Would Brazil accept a slightly lower speed of 32 knots?
Is there a specific range requirement?
Finally are there any specific armour specifications desired?

For what you specify 33kn is not necessary and too expensive. You harld need more than 25kn, methinks.

Quoted

Is the 15,000 ton limit in standard or light tons?

Most likely light when you look at this bit behind the 15,000 tons...

Quoted

(note for expense purposes the smaller the better while still being able to fulfil the other requirements)

Something like this perhaps?

X1, Brazil Carrier laid down 1938

Displacement:
12,321 t light; 12,689 t standard; 14,096 t normal; 15,221 t full load

Dimensions: Length overall / water x beam x draught
666.92 ft / 650.00 ft x 66.00 ft x 23.00 ft (normal load)
203.28 m / 198.12 m x 20.12 m x 7.01 m

Armament:
8 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread
16 - 1.46" / 37.0 mm guns (4x4 guns), 1.55lbs / 0.70kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, all amidships, 2 raised mounts - superfiring
20 - 1.46" / 37.0 mm guns (10x2 guns), 1.55lbs / 0.70kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
24 - 0.52" / 13.2 mm guns (8x3 guns), 0.07lbs / 0.03kg shells, 1938 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 479 lbs / 217 kg
Shells per gun, main battery: 300

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 425.00 ft / 129.54 m 11.00 ft / 3.35 m
Ends: Unarmoured
Main Belt covers 101% of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
2nd: 1.00" / 25 mm - -
3rd: 1.00" / 25 mm - -
4th: 0.50" / 13 mm - -

- Armour deck: 2.00" / 51 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 111,335 shp / 83,056 Kw = 34.00 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 2,531 tons

Complement:
646 - 840

Cost:
£5.120 million / $20.479 million

Distribution of weights at normal displacement:
Armament: 60 tons, 0.4%
Armour: 1,965 tons, 13.9%
- Belts: 779 tons, 5.5%
- Torpedo bulkhead: 0 tons, 0.0%
- Armament: 49 tons, 0.3%
- Armour Deck: 1,100 tons, 7.8%
- Conning Tower: 38 tons, 0.3%
Machinery: 3,049 tons, 21.6%
Hull, fittings & equipment: 4,747 tons, 33.7%
Fuel, ammunition & stores: 1,775 tons, 12.6%
Miscellaneous weights: 2,500 tons, 17.7%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
18,364 lbs / 8,330 Kg = 348.3 x 4.7 " / 120 mm shells or 1.9 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 3.0 ft / 0.9 m
Roll period: 16.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality (Average = 1.00): 1.29

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 9.85 : 1
'Natural speed' for length: 29.13 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 54
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 32.00 ft / 9.75 m
- Forecastle (20%): 23.00 ft / 7.01 m
- Mid (50%): 23.00 ft / 7.01 m
- Quarterdeck (15%): 23.00 ft / 7.01 m
- Stern: 23.00 ft / 7.01 m
- Average freeboard: 23.72 ft / 7.23 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93.6%
- Above water (accommodation/working, high = better): 201.6%
Waterplane Area: 29,724 Square feet or 2,761 Square metres
Displacement factor (Displacement / loading): 128%
Structure weight / hull surface area: 97 lbs/sq ft or 473 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.58
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Vickers of Great Britain offers Brazil the following design. It's light and fast with reasonable armour.

Vickers Light Carrier, Great Britain/ Brazil Aircraft Carrier laid down 1938

Displacement:
15,129 t light; 15,634 t standard; 17,632 t normal; 19,230 t full load

Dimensions: Length overall / water x beam x draught
715.33 ft / 700.00 ft x 80.00 ft x 19.00 ft (normal load)
218.03 m / 213.36 m x 24.38 m x 5.79 m

Armament:
12 - 4.70" / 119 mm guns (6x2 guns), 51.91lbs / 23.55kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts - superfiring
24 - 1.46" / 37.0 mm guns (12x2 guns), 1.55lbs / 0.70kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 8 raised mounts
12 - 0.52" / 13.2 mm guns (6x2 guns), 0.07lbs / 0.03kg shells, 1938 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 661 lbs / 300 kg
Shells per gun, main battery: 400

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 160.00 ft / 48.77 m 15.00 ft / 4.57 m
Ends: Unarmoured
Main Belt covers 35 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm 0.50" / 13 mm 1.50" / 38 mm
2nd: 0.50" / 13 mm - -

- Armour deck: 2.50" / 64 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 140,000 shp / 104,440 Kw = 33.24 kts
Range 10,000nm at 16.00 kts
Bunker at max displacement = 3,596 tons

Complement:
764 - 994

Cost:
£6.401 million / $25.603 million

Distribution of weights at normal displacement:
Armament: 83 tons, 0.5 %
Armour: 2,415 tons, 13.7 %
- Belts: 524 tons, 3.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 31 tons, 0.2 %
- Armour Deck: 1,859 tons, 10.5 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 3,834 tons, 21.7 %
Hull, fittings & equipment: 5,998 tons, 34.0 %
Fuel, ammunition & stores: 2,503 tons, 14.2 %
Miscellaneous weights: 2,800 tons, 15.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
23,331 lbs / 10,583 Kg = 449.4 x 4.7 " / 119 mm shells or 2.4 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 4.7 ft / 1.4 m
Roll period: 15.4 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.08
Seaboat quality (Average = 1.00): 1.13

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.580
Length to Beam Ratio: 8.75 : 1
'Natural speed' for length: 26.46 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 62
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 3.00 ft / 0.91 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 46.00 ft / 14.02 m
- Forecastle (20 %): 46.00 ft / 14.02 m (19.50 ft / 5.94 m aft of break)
- Mid (50 %): 19.50 ft / 5.94 m
- Quarterdeck (20 %): 19.50 ft / 5.94 m
- Stern: 19.50 ft / 5.94 m
- Average freeboard: 24.80 ft / 7.56 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 92.5 %
- Above water (accommodation/working, high = better): 195.4 %
Waterplane Area: 40,198 Square feet or 3,734 Square metres
Displacement factor (Displacement / loading): 130 %
Structure weight / hull surface area: 103 lbs/sq ft or 505 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.11
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Belt is box armour around magazines
Deck armour is 2in on main deck and 0.5in burster on flight deck.
Hangar deck: 545 x 60 x 17.5ft
Served by two 40 x 33ft lifts with capacity for 15,000lbs
One hydralic accelerator with capacity for 15,000lbs aircraft
Arrestor gear of 8 wires, 1 trickle wire, 2 forward wires and two safety barriers
36 aircraft usually carried (3x 12 aircraft squadrons)
9 crated spare aircraft carried for attrition replacement
Provision for two radio-location sets

Vickers might need to go back to the drawing board.

Quoted

Main belt does not fully cover magazines and engineering spaces

Edit: Never mind. Missed the armor remark below.

Two more. One bigger than X1 and one smaller than X1...



X2, Brazil Carrier laid down 1938

Displacement:
14,869 t light; 15,337 t standard; 16,918 t normal; 18,183 t full load

Dimensions: Length overall / water x beam x draught
711.46 ft / 695.00 ft x 71.00 ft x 24.00 ft (normal load)
216.85 m / 211.84 m x 21.64 m x 7.32 m

Armament:
8 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread
4 - 4.72" / 120 mm guns (2x2 guns), 52.72lbs / 23.92kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
16 - 1.46" / 37.0 mm guns (4x4 guns), 1.55lbs / 0.70kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
20 - 1.46" / 37.0 mm guns (10x2 guns), 1.55lbs / 0.70kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
24 - 0.52" / 13.2 mm guns (8x3 guns), 0.07lbs / 0.03kg shells, 1938 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 690 lbs / 313 kg
Shells per gun, main battery: 300

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.50" / 140 mm 475.00 ft / 144.78 m 13.00 ft / 3.96 m
Ends: Unarmoured
Main Belt covers 105% of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
3rd: 1.00" / 25 mm - -
4th: 1.00" / 25 mm - -
5th: 0.50" / 13 mm - -

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

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 108,490 shp / 80,934 Kw = 33.00 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 2,847 tons

Complement:
741 - 964

Cost:
£5.686 million / $22.743 million

Distribution of weights at normal displacement:
Armament: 86 tons, 0.5%
Armour: 3,411 tons, 20.2%
- Belts: 1,405 tons, 8.3%
- Torpedo bulkhead: 0 tons, 0.0%
- Armament: 66 tons, 0.4%
- Armour Deck: 1,898 tons, 11.2%
- Conning Tower: 43 tons, 0.3%
Machinery: 2,971 tons, 17.6%
Hull, fittings & equipment: 5,401 tons, 31.9%
Fuel, ammunition & stores: 2,049 tons, 12.1%
Miscellaneous weights: 3,000 tons, 17.7%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
23,549 lbs / 10,682 Kg = 446.6 x 4.7 " / 120 mm shells or 2.5 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 3.3 ft / 1.0 m
Roll period: 16.5 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.11
Seaboat quality (Average = 1.00): 1.22

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 9.79 : 1
'Natural speed' for length: 30.13 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.00 ft / 9.45 m
- Forecastle (20%): 21.00 ft / 6.40 m
- Mid (50%): 21.00 ft / 6.40 m
- Quarterdeck (15%): 21.00 ft / 6.40 m
- Stern: 21.00 ft / 6.40 m
- Average freeboard: 21.80 ft / 6.64 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 81.3%
- Above water (accommodation/working, high = better): 184.6%
Waterplane Area: 34,190 Square feet or 3,176 Square metres
Displacement factor (Displacement / loading): 130%
Structure weight / hull surface area: 103 lbs/sq ft or 503 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.16
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily




X3, Brazil Carrier laid down 1938

Displacement:
9,220 t light; 9,512 t standard; 10,457 t normal; 11,213 t full load

Dimensions: Length overall / water x beam x draught
616.46 ft / 600.00 ft x 61.00 ft x 20.00 ft (normal load)
187.90 m / 182.88 m x 18.59 m x 6.10 m

Armament:
8 - 4.72" / 120 mm guns (4x2 guns), 52.72lbs / 23.92kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread
16 - 1.46" / 37.0 mm guns (4x4 guns), 1.55lbs / 0.70kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, all amidships, 2 raised mounts - superfiring
12 - 1.46" / 37.0 mm guns (6x2 guns), 1.55lbs / 0.70kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
18 - 0.52" / 13.2 mm guns (6x3 guns), 0.07lbs / 0.03kg shells, 1938 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 466 lbs / 212 kg
Shells per gun, main battery: 300

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 390.00 ft / 118.87 m 9.37 ft / 2.86 m
Ends: Unarmoured
Main Belt covers 100% of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
2nd: 1.00" / 25 mm - -
3rd: 1.00" / 25 mm - -
4th: 0.50" / 13 mm - -

- Armour deck: 1.75" / 44 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 84,827 shp / 63,281 Kw = 33.00 kts
Range 8,000nm at 15.00 kts
Bunker at max displacement = 1,700 tons

Complement:
516 - 672

Cost:
£3.928 million / $15.711 million

Distribution of weights at normal displacement:
Armament: 58 tons, 0.6%
Armour: 1,350 tons, 12.9%
- Belts: 457 tons, 4.4%
- Torpedo bulkhead: 0 tons, 0.0%
- Armament: 41 tons, 0.4%
- Armour Deck: 821 tons, 7.9%
- Conning Tower: 31 tons, 0.3%
Machinery: 2,323 tons, 22.2%
Hull, fittings & equipment: 3,690 tons, 35.3%
Fuel, ammunition & stores: 1,237 tons, 11.8%
Miscellaneous weights: 1,800 tons, 17.2%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
13,681 lbs / 6,206 Kg = 259.5 x 4.7 " / 120 mm shells or 1.7 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 2.6 ft / 0.8 m
Roll period: 15.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.13
Seaboat quality (Average = 1.00): 1.25

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 9.84 : 1
'Natural speed' for length: 27.99 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.00 ft / 9.45 m
- Forecastle (20%): 21.00 ft / 6.40 m
- Mid (50%): 21.00 ft / 6.40 m
- Quarterdeck (15%): 21.00 ft / 6.40 m
- Stern: 21.00 ft / 6.40 m
- Average freeboard: 21.80 ft / 6.64 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 96.0%
- Above water (accommodation/working, high = better): 196.6%
Waterplane Area: 25,359 Square feet or 2,356 Square metres
Displacement factor (Displacement / loading): 127%
Structure weight / hull surface area: 90 lbs/sq ft or 438 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.54
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Quoted

Originally posted by HoOmAn
For what you specify 33kn is not necessary and too expensive. You harld need more than 25kn, methinks.

A 25 knot carrier would be hard-pressed to serve in wartime as a "scout/attack carrier working with the Brazilian cruiser squadrons", per the requirements.

Italy could offer a more complete conversion of a Pisa Class light cruiser. The above scheme shows the two vessels already completed in a simpler conversion scheme.

Only light armour is used in order to keep out splinters.

An airgroup of 27 could be operated effectively, e.g. 12 Fighter, 12 Strike, 3 Reconnaissance but there is space for up to 50 aircraft.

120mm armament could be added, but there is little available space.

The cost of such a scheme would be 75% which amounts to 8216tons.


RM Pisa, Italian Light Cruiser laid down 1924 (Engine 1938)

Displacement:
10,955 t light; 11,251 t standard; 12,612 t normal; 13,701 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(624.57 ft / 606.96 ft) x 62.66 ft (Bulges 75.79 ft) x (21.33 / 22.90 ft)
(190.37 m / 185.00 m) x 19.10 m (Bulges 23.10 m) x (6.50 / 6.98 m)

Armament:
24 - 1.46" / 37.0 mm 54.0 cal guns - 1.66lbs / 0.75kg shells, 2,000 per gun
Anti-air guns in deck mounts, 1937 Model
6 x Quad mounts on sides, evenly spread
1 raised mount
Weight of broadside 40 lbs / 18 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.42" / 36 mm 373.20 ft / 113.75 m 9.51 ft / 2.90 m
Ends: Unarmoured
Main Belt covers 95 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.39" / 10 mm 0.39" / 10 mm -

- Armoured deck - multiple decks: 1.18" / 30 mm For and Aft decks

- Conning towers: Forward 2.76" / 70 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 110,000 shp / 82,060 Kw = 32.99 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 2,450 tons

Complement:
594 - 773

Cost:
£2.498 million / $9.993 million

Distribution of weights at normal displacement:
Armament: 11 tons, 0.1 %
Armour: 689 tons, 5.5 %
- Belts: 208 tons, 1.7 %
- Armament: 14 tons, 0.1 %
- Armour Deck: 435 tons, 3.4 %
- Conning Tower: 32 tons, 0.3 %
Machinery: 3,012 tons, 23.9 %
Hull, fittings & equipment: 4,003 tons, 31.7 %
Fuel, ammunition & stores: 1,658 tons, 13.1 %
Miscellaneous weights: 3,240 tons, 25.7 %
- Hull below water: 648 tons
- Hull above water: 1,134 tons
- On freeboard deck: 1,458 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,634 lbs / 6,638 Kg = 9,468.4 x 1.5 " / 37 mm shells or 2.0 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 3.7 ft / 1.1 m
Roll period: 16.6 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.22

Hull form characteristics:
Hull has raised forecastle,
a normal bow and a round stern
Block coefficient (normal/deep): 0.450 / 0.455
Length to Beam Ratio: 8.01 : 1
'Natural speed' for length: 24.64 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 39.37 ft / 12.00 m, 39.37 ft / 12.00 m
- Forward deck: 30.00 %, 17.39 ft / 5.30 m, 17.39 ft / 5.30 m
- Aft deck: 35.00 %, 17.39 ft / 5.30 m, 17.39 ft / 5.30 m
- Quarter deck: 15.00 %, 17.39 ft / 5.30 m, 17.39 ft / 5.30 m
- Average freeboard: 21.78 ft / 6.64 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 94.0 %
- Above water (accommodation/working, high = better): 135.3 %
Waterplane Area: 24,261 Square feet or 2,254 Square metres
Displacement factor (Displacement / loading): 126 %
Structure weight / hull surface area: 95 lbs/sq ft or 464 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.42
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

120tons per aircraft
27 aircraft = 3240tons
3240t 45/35/20%

Space for 50 aircraft

HDW's entry is the following vessel. She's capable of 33 knots and a 10,000 mile cruising range, and is designed to operate up to 48 aircraft.

Fortaleza, Brazillian Aircaft Carrier laid down 1939

Displacement:
14,883 t light; 15,345 t standard; 16,921 t normal; 18,181 t full load

Dimensions: Length overall / water x beam x draught
735.55 ft / 705.38 ft x 78.74 ft x 21.33 ft (normal load)
224.20 m / 215.00 m x 24.00 m x 6.50 m

Armament:
8 - 4.72" / 120 mm guns (4x2 guns), 52.72lbs / 23.92kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread
4 - 4.72" / 120 mm guns (2x2 guns), 52.72lbs / 23.92kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
24 - 1.46" / 37.0 mm guns (12x2 guns), 1.55lbs / 0.70kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
24 - 0.52" / 13.2 mm guns (6x4 guns), 0.07lbs / 0.03kg shells, 1939 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 671 lbs / 305 kg
Shells per gun, main battery: 300

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 479.66 ft / 146.20 m 10.66 ft / 3.25 m
Ends: Unarmoured
Main Belt covers 105 % of normal length

- Torpedo Bulkhead:
1.18" / 30 mm 479.66 ft / 146.20 m 18.77 ft / 5.72 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm 1.18" / 30 mm
2nd: 1.18" / 30 mm 0.39" / 10 mm 1.18" / 30 mm
3rd: 0.39" / 10 mm - -

- Armour deck: 2.76" / 70 mm, Conning tower: 5.91" / 150 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 108,862 shp / 81,211 Kw = 33.00 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 2,836 tons

Complement:
741 - 964

Cost:
£5.840 million / $23.360 million

Distribution of weights at normal displacement:
Armament: 84 tons, 0.5 %
Armour: 3,316 tons, 19.6 %
- Belts: 840 tons, 5.0 %
- Torpedo bulkhead: 393 tons, 2.3 %
- Armament: 37 tons, 0.2 %
- Armour Deck: 1,962 tons, 11.6 %
- Conning Tower: 84 tons, 0.5 %
Machinery: 2,945 tons, 17.4 %
Hull, fittings & equipment: 6,118 tons, 36.2 %
Fuel, ammunition & stores: 2,038 tons, 12.0 %
Miscellaneous weights: 2,420 tons, 14.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
30,267 lbs / 13,729 Kg = 574.1 x 4.7 " / 120 mm shells or 4.3 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 4.7 ft / 1.4 m
Roll period: 15.2 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.08
Seaboat quality (Average = 1.00): 1.33

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 8.96 : 1
'Natural speed' for length: 30.57 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 53
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 13.12 ft / 4.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.53 ft / 9.00 m
- Forecastle (20 %): 29.53 ft / 9.00 m
- Mid (40 %): 22.97 ft / 7.00 m
- Quarterdeck (12 %): 22.97 ft / 7.00 m
- Stern: 22.97 ft / 7.00 m
- Average freeboard: 24.93 ft / 7.60 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 103.3 %
- Above water (accommodation/working, high = better): 236.7 %
Waterplane Area: 38,483 Square feet or 3,575 Square metres
Displacement factor (Displacement / loading): 138 %
Structure weight / hull surface area: 108 lbs/sq ft or 527 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.30
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

space for 48 aircraft

105 tons reserved for command quarters, radar, and growth

This design has an enclosed bow, and deck armour consists of a 40mm hangar deck and a 20mm burster on the flight deck.

Uniao, Brazilian (Atlantean design) Aircraft carrier laid down 1937

Displacement:
15,530 t light; 15,998 t standard; 17,631 t normal; 18,937 t full load

Dimensions: Length overall / water x beam x draught
719.83 ft / 698.00 ft x 76.00 ft x 23.50 ft (normal load)
219.40 m / 212.75 m x 23.16 m x 7.16 m

Armament:
12 - 4.72" / 120 mm guns (6x2 guns), 52.58lbs / 23.85kg shells, 1937 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread, all raised mounts
24 - 1.46" / 37.0 mm guns (12x2 guns), 1.55lbs / 0.70kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
16 - 0.50" / 12.7 mm guns (8x2 guns), 0.06lbs / 0.03kg shells, 1937 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 669 lbs / 304 kg
Shells per gun, main battery: 300

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.95" / 100 mm 475.00 ft / 144.78 m 12.00 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 105 % of normal length

- Torpedo Bulkhead:
1.58" / 40 mm 475.00 ft / 144.78 m 23.00 ft / 7.01 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm -

- Armour deck: 2.36" / 60 mm, Conning tower: 2.36" / 60 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 98,755 shp / 73,671 Kw = 32.00 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 2,938 tons

Complement:
764 - 994

Cost:
£5.438 million / $21.752 million

Distribution of weights at normal displacement:
Armament: 84 tons, 0.5 %
Armour: 3,255 tons, 18.5 %
- Belts: 937 tons, 5.3 %
- Torpedo bulkhead: 637 tons, 3.6 %
- Armament: 50 tons, 0.3 %
- Armour Deck: 1,597 tons, 9.1 %
- Conning Tower: 34 tons, 0.2 %
Machinery: 2,737 tons, 15.5 %
Hull, fittings & equipment: 6,344 tons, 36.0 %
Fuel, ammunition & stores: 2,101 tons, 11.9 %
Miscellaneous weights: 3,110 tons, 17.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
28,949 lbs / 13,131 Kg = 550.6 x 4.7 " / 120 mm shells or 4.4 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 4.1 ft / 1.3 m
Roll period: 15.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.11
Seaboat quality (Average = 1.00): 1.37

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.495
Length to Beam Ratio: 9.18 : 1
'Natural speed' for length: 30.37 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 51
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 8.00 ft / 2.44 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 38.00 ft / 11.58 m
- Forecastle (20 %): 22.00 ft / 6.71 m
- Mid (50 %): 22.00 ft / 6.71 m
- Quarterdeck (15 %): 22.00 ft / 6.71 m
- Stern: 22.00 ft / 6.71 m
- Average freeboard: 23.28 ft / 7.10 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 100.9 %
- Above water (accommodation/working, high = better): 200.7 %
Waterplane Area: 36,585 Square feet or 3,399 Square metres
Displacement factor (Displacement / loading): 141 %
Structure weight / hull surface area: 115 lbs/sq ft or 563 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.06
- Longitudinal: 1.34
- Overall: 1.08
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

will sit this one out. Our last attempt at building a carrier for a South American country hasn't gone well. "What??! No payments for a YEAR??!!! And that *%@#!!*&#$@ hulk filling a valuable drydock this whole time?!?!"

The RF Navy are so disgusted they are finishing her themselves, just to get the D3 cleared.

So the Russians will only do it if they get paid well in advance.

May be another country will buy the hulk and so the dock is empty

Quoted

Originally posted by AdmKuznetsov
will sit this one out. Our last attempt at building a carrier for a South American country hasn't gone well. "What??! No payments for a YEAR??!!! And that *%@#!!*&#$@ hulk filling a valuable drydock this whole time?!?!"

The RF Navy are so disgusted they are finishing her themselves, just to get the D3 cleared.

If memory serves, both Chile and Colombia offered to buy it and complete it. I've just never seen any specs, and never heard if you were interested in selling...

Flawed as it might be, that ship might also be a candidate for Brazil's needs....

Not only Chile and Columbia and may be Brazil is intersted . But as Brock said, i also have never seen any stats

Nope, that's not the one Howard bought. Russia was converting an old collier for Peru.

Quoted

Originally posted by Brockpaine
Nope, that's not the one Howard bought. Russia was converting an old collier for Peru.

Hmmm, I can't find any details about the deal whatsoever apart from the 2500tons Peru paid to Russia in Q3 and Q4 of 1936. Nothing about the design at all.

I know. Howard once told me he'd ordered the one Walter posted; but we were discussing the situation in the FAR folder and AdmK pointed out that he'd actually ordered a collier rebuilt to his standards. Stuart should have the specs, I presume, but that's what it is.