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1

Wednesday, September 24th 2003, 5:55pm

Navarra rebuild revisited

Navarra, Iberia CVX laid down 1921

Displacement:
19,648 t light; 20,097 t standard; 22,189 t normal; 23,774 t full load
Loading submergence 1,086 tons/feet

Dimensions:
524.93 ft x 111.55 ft x 25.26 ft (normal load)
160.00 m x 34.00 m x 7.70 m

Armament:
12 - 2.24" / 57 mm AA guns
Weight of broadside 68 lbs / 31 kg

Armour:
Belt 9.02" / 229 mm, upper belt 5.91" / 150 mm, end belts 3.94" / 100 mm
Belts cover 84 % of normal area
Main belt does not fully protect magazines and engineering spaces

Armour deck 2.36" / 60 mm, Torpedo bulkhead 0.79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 97,281 shp / 72,572 Kw = 28.00 kts
Range 9,000nm at 15.00 kts

Complement:
909 - 1,181

Cost:
£2.962 million / $11.849 million

Distribution of weights at normal displacement:
Armament: 8 tons, 0.0 %
Armour: 4,313 tons, 19.4 %
Belts: 2,400 tons, 10.8 %, Armament: 0 tons, 0.0 %, Armour Deck: 1,662 tons, 7.5 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 251 tons, 1.1 %
Machinery: 3,350 tons, 15.1 %
Hull, fittings & equipment: 6,477 tons, 29.2 %
Fuel, ammunition & stores: 2,541 tons, 11.5 %
Miscellaneous weights: 5,500 tons, 24.8 %

Metacentric height 7.4

Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.13
Shellfire needed to sink: 28,684 lbs / 13,011 Kg = 68.0 x 6 " / 152 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 4.4
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.00
Relative quality as seaboat: 1.08

Hull form characteristics:
Block coefficient: 0.525
Sharpness coefficient: 0.44
Hull speed coefficient 'M': 5.71
'Natural speed' for length: 22.91 kts
Power going to wave formation at top speed: 63 %
Trim: 65
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 93.8 %
Relative accommodation and working space: 209.1 %
(Average = 100%)
Displacement factor: 134 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.92
(Structure weight / hull surface area: 122 lbs / square foot or 596 Kg / square metre)
Relative longitudinal hull strength: 2.30
(for 26.25 ft / 8.00 m average freeboard, freeboard adjustment 8.49 ft)
Relative composite hull strength: 1.01

reengined, torpedo bulbs added
65 planes

2

Wednesday, September 24th 2003, 8:53pm

something just got pointed out to me ...

Navarra, Iberia CVX laid down 1921

Displacement:
19,602 t light; 20,092 t standard; 22,189 t normal; 23,778 t full load
Loading submergence 1,086 tons/feet

Dimensions:
524.93 ft x 111.55 ft x 25.26 ft (normal load)
160.00 m x 34.00 m x 7.70 m

Armament:
16 - 3.94" / 100 mm guns (4 Main turrets x 4 guns)
12 - 2.24" / 57 mm AA guns
Weight of broadside 556 lbs / 252 kg

Armour:
Belt 9.02" / 229 mm, upper belt 5.91" / 150 mm, end belts 3.94" / 100 mm
Belts cover 84 % of normal area
Main belt does not fully protect magazines and engineering spaces
Main turrets 2.36" / 60 mm,
Armour deck 2.36" / 60 mm, Torpedo bulkhead 0.79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 97,281 shp / 72,572 Kw = 28.00 kts
Range 9,000nm at 15.00 kts

Complement:
909 - 1,181

Cost:
£3.089 million / $12.355 million

Distribution of weights at normal displacement:
Armament: 69 tons, 0.3 %
Armour: 4,487 tons, 20.2 %
Belts: 2,400 tons, 10.8 %, Armament: 174 tons, 0.8 %, Armour Deck: 1,662 tons, 7.5 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 251 tons, 1.1 %
Machinery: 3,350 tons, 15.1 %
Hull, fittings & equipment: 6,695 tons, 30.2 %
Fuel, ammunition & stores: 2,587 tons, 11.7 %
Miscellaneous weights: 5,000 tons, 22.5 %

Metacentric height 7.4

Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.13
Shellfire needed to sink: 28,858 lbs / 13,090 Kg = 945.8 x 3.9 " / 100 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 4.4
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 69 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.02
Relative quality as seaboat: 1.07

Hull form characteristics:
Block coefficient: 0.525
Sharpness coefficient: 0.44
Hull speed coefficient 'M': 5.71
'Natural speed' for length: 22.91 kts
Power going to wave formation at top speed: 63 %
Trim: 65
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 93.4 %
Relative accommodation and working space: 209.1 %
(Average = 100%)
Displacement factor: 133 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.93
(Structure weight / hull surface area: 126 lbs / square foot or 616 Kg / square metre)
Relative longitudinal hull strength: 2.33
(for 26.25 ft / 8.00 m average freeboard, freeboard adjustment 8.49 ft)
Relative composite hull strength: 1.01

reengined, torpedo bulbs added
65 planes