WesWorld

[SIZE=3]James Connolly, Edward Daly, and Constance Markievicz, Irish Ferry laid down 1940[/SIZE]

Displacement:
3,342 t light; 3,422 t standard; 4,000 t normal; 4,463 t full load

Dimensions: Length overall / water x beam x draught
370.36 ft / 360.89 ft x 50.03 ft x 13.12 ft (normal load)
112.88 m / 110.00 m x 15.25 m x 4.00 m

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 12,221 shp / 9,117 Kw = 22.00 kts
Range 3,250nm at 22.00 kts
Bunker at max displacement = 1,041 tons

Complement:
250 - 326

Cost:
£0.976 million / $3.905 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 327 tons, 8.2 %
Hull, fittings & equipment: 1,340 tons, 33.5 %
Fuel, ammunition & stores: 658 tons, 16.5 %
Miscellaneous weights: 1,675 tons, 41.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,179 lbs / 3,710 Kg = 75.7 x 6 " / 152 mm shells or 1.7 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 2.1 ft / 0.6 m
Roll period: 14.5 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.94

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.591
Length to Beam Ratio: 7.21 : 1
'Natural speed' for length: 22.04 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 31
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.00 ft / 7.92 m
- Forecastle (20 %): 22.00 ft / 6.71 m
- Mid (50 %): 18.00 ft / 5.49 m
- Quarterdeck (15 %): 18.00 ft / 5.49 m
- Stern: 18.00 ft / 5.49 m
- Average freeboard: 19.72 ft / 6.01 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 72.7 %
- Above water (accommodation/working, high = better): 196.7 %
Waterplane Area: 13,643 Square feet or 1,268 Square metres
Displacement factor (Displacement / loading): 172 %
Structure weight / hull surface area: 61 lbs/sq ft or 298 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.89
- Longitudinal: 2.90
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, rides out heavy weather easily

[SIZE=3]Wolfe Tone, Irish Ferry laid down 1940[/SIZE]

Displacement:
4,900 t light; 5,038 t standard; 6,888 t normal; 8,368 t full load

Dimensions: Length overall / water x beam x draught
415.19 ft / 393.70 ft x 62.01 ft x 14.11 ft (normal load)
126.55 m / 120.00 m x 18.90 m x 4.30 m

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 9,437 shp / 7,040 Kw = 18.00 kts
Range 11,200nm at 18.00 kts
Bunker at max displacement = 3,330 tons

Complement:
377 - 491

Cost:
£1.241 million / $4.964 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 252 tons, 3.7 %
Hull, fittings & equipment: 2,148 tons, 31.2 %
Fuel, ammunition & stores: 1,988 tons, 28.9 %
Miscellaneous weights: 2,500 tons, 36.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
20,875 lbs / 9,469 Kg = 193.3 x 6 " / 152 mm shells or 3.2 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 3.4 ft / 1.0 m
Roll period: 14.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.700
Length to Beam Ratio: 6.35 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 9.84 ft / 3.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.99 ft / 9.75 m
- Forecastle (20 %): 25.98 ft / 7.92 m
- Mid (50 %): 22.01 ft / 6.71 m
- Quarterdeck (15 %): 12.01 ft / 3.66 m (24.02 ft / 7.32 m before break)
- Stern: 12.01 ft / 3.66 m
- Average freeboard: 22.73 ft / 6.93 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 52.4 %
- Above water (accommodation/working, high = better): 232.0 %
Waterplane Area: 19,567 Square feet or 1,818 Square metres
Displacement factor (Displacement / loading): 229 %
Structure weight / hull surface area: 73 lbs/sq ft or 357 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.62
- 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
Excellent seaboat, comfortable, rides out heavy weather easily

Breakdown of Miscellaneous Weights:
520 tons for 52x 4-person cabins (208 passengers at 2.5t per head)
112 tons for 4x 4-person 1st class cabins (16 passengers at 7 tons per head)
100 tons for saloon
120 tons for ship's restaurant
20 tons for observation deck
600 tons for eight Class-A lifeboats and gear
1028 tons for vehicles and onboard cargo
2,500 tons total

Notes:
Range is actually 4,000nm at 18.00 kts: bunker at max displacement is 1,229 tons. 2101 tons of bunker fuel simmed as ballast and deep-stowed cargo.

Neat! Ferries!

Will you have a miscellaneous weights breakdown for the first one or is it all for the passengers and they are squeezed aboard since it is for short distances anyway?

Quoted

Originally posted by Rooijen10
Neat! Ferries!

Will you have a miscellaneous weights breakdown for the first one or is it all for the passengers and they are squeezed aboard since it is for short distances anyway?

Ah, I kinda forgot to do the weights breakdown for that one, partly as it's rather difficult to assess how many passengers it would take. Our formulas give us some input for multi-day passage (and I used them on the Wolfe Tone, as she's on an overnight service[/I]) but for a fast day crossing, I'm uncertain how that formula would change.

However, the Connolly's design is partly based off some historical ferries, such as the SS Invicta, the TSS King Orry, and the TSS Ben-my-Chree, etc. Invicta carried around 1,300 people, while some other ships of smaller size than the Connelly carried in excess of 2,000 passengers.