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RAMS Princess Vespa
RAMS Princess Leia

Princess Vespa class, Australia Civilian Mail Aircraft Carrier laid down 1933

10 A/C

Displacement:
13,001 t light; 13,375 t standard; 18,697 t normal; 22,955 t full load

Dimensions: Length overall / water x beam x draught
590.00 ft / 590.00 ft x 79.00 ft x 27.00 ft (normal load)
179.83 m / 179.83 m x 24.08 m x 8.23 m

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 41,638 shp / 31,062 Kw = 24.00 kts
Range 15,000nm at 20.00 kts
Bunker at max displacement = 9,580 tons

Complement:
799 - 1,039

Cost:
£2.954 million / $11.816 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 1,213 tons, 6.5 %
Hull, fittings & equipment: 5,888 tons, 31.5 %
Fuel, ammunition & stores: 5,696 tons, 30.5 %
Miscellaneous weights: 5,900 tons, 31.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
39,253 lbs / 17,805 Kg = 363.5 x 6 " / 152 mm shells or 4.2 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 4.9 ft / 1.5 m
Roll period: 14.9 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.520
Length to Beam Ratio: 7.47 : 1
'Natural speed' for length: 24.29 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 25
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 32.00 ft / 9.75 m
- Forecastle (20 %): 24.00 ft / 7.32 m
- Mid (50 %): 24.00 ft / 7.32 m
- Quarterdeck (15 %): 24.00 ft / 7.32 m
- Stern: 24.00 ft / 7.32 m
- Average freeboard: 24.64 ft / 7.51 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 56.4 %
- Above water (accommodation/working, high = better): 181.0 %
Waterplane Area: 31,631 Square feet or 2,939 Square metres
Displacement factor (Displacement / loading): 225 %
Structure weight / hull surface area: 118 lbs/sq ft or 575 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.09
- Longitudinal: 2.05
- Overall: 1.16
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, rides out heavy weather easily