WesWorld

Quoted

[SIZE=3]Deirdre, Irish Destroyer laid down 1944[/SIZE]

Displacement:
2,500 t light; 2,663 t standard; 3,282 t normal; 3,777 t full load

Dimensions: Length overall / water x beam x draught
437.40 ft / 426.51 ft x 42.98 ft (Bulges 43.31 ft) x 13.12 ft (normal load)
133.32 m / 130.00 m x 13.10 m (Bulges 13.20 m) x 4.00 m

Armament:
6 - 4.50" / 114 mm guns (3x2 guns), 45.00lbs / 20.41kg shells, 1944 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1944 Model
Anti-aircraft guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
2 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1944 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, all raised mounts
4 - 0.66" / 16.8 mm guns in single mounts, 0.14lbs / 0.06kg shells, 1944 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 282 lbs / 128 kg
Shells per gun, main battery: 600
5 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.79" / 20 mm 0.39" / 10 mm 0.39" / 10 mm
3rd: 0.79" / 20 mm 0.39" / 10 mm 0.39" / 10 mm
4th: 0.59" / 15 mm - -

- Conning tower: 1.18" / 30 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 2 shafts, 53,619 shp / 40,000 Kw = 34.11 kts
Range 7,500nm at 18.00 kts
Bunker at max displacement = 1,115 tons

Complement:
216 - 281

Cost:
£2.080 million / $8.320 million

Distribution of weights at normal displacement:
Armament: 36 tons, 1.1 %
Armour: 26 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 20 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.2 %
Machinery: 1,369 tons, 41.7 %
Hull, fittings & equipment: 869 tons, 26.5 %
Fuel, ammunition & stores: 782 tons, 23.8 %
Miscellaneous weights: 200 tons, 6.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,261 lbs / 572 Kg = 27.7 x 4.5 " / 114 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 2.2 ft / 0.7 m
Roll period: 12.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.25
Seaboat quality (Average = 1.00): 1.08

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.474
Length to Beam Ratio: 9.85 : 1
'Natural speed' for length: 23.67 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.43 ft / 7.75 m
- Forecastle (25 %): 22.97 ft / 7.00 m
- Mid (50 %): 20.51 ft / 6.25 m (13.12 ft / 4.00 m aft of break)
- Quarterdeck (15 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 17.98 ft / 5.48 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 152.3 %
- Above water (accommodation/working, high = better): 148.4 %
Waterplane Area: 12,401 Square feet or 1,152 Square metres
Displacement factor (Displacement / loading): 101 %
Structure weight / hull surface area: 39 lbs/sq ft or 190 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.51
- Longitudinal: 1.48
- Overall: 0.56
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Quoted

Originally posted by BruceDuncan
I am somewhat surprised by the bulges on a ship of this side though. Any particular reason?

Quoted

[SIZE=3]Deirdre-class, Irish Destroyer laid down 1944[/SIZE]

Displacement:
2,500 t light; 2,663 t standard; 3,282 t normal; 3,777 t full load

Dimensions: Length overall / water x beam x draught
437.40 ft / 426.51 ft x 43.31 ft x 13.12 ft (normal load)
133.32 m / 130.00 m x 13.20 m x 4.00 m

Armament:
6 - 4.50" / 114 mm guns (3x2 guns), 45.00lbs / 20.41kg shells, 1944 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1944 Model
Anti-aircraft guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
2 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1944 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, all raised mounts
4 - 0.66" / 16.8 mm guns in single mounts, 0.14lbs / 0.06kg shells, 1944 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 282 lbs / 128 kg
Shells per gun, main battery: 600
5 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.79" / 20 mm 0.39" / 10 mm 0.39" / 10 mm
3rd: 0.79" / 20 mm 0.39" / 10 mm 0.39" / 10 mm
4th: 0.59" / 15 mm - -

- Conning tower: 1.18" / 30 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 2 shafts, 53,619 shp / 40,000 Kw = 34.11 kts
Range 7,500nm at 18.00 kts
Bunker at max displacement = 1,115 tons

Complement:
216 - 281

Cost:
£2.080 million / $8.320 million

Distribution of weights at normal displacement:
Armament: 36 tons, 1.1 %
Armour: 26 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 20 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.2 %
Machinery: 1,369 tons, 41.7 %
Hull, fittings & equipment: 869 tons, 26.5 %
Fuel, ammunition & stores: 782 tons, 23.8 %
Miscellaneous weights: 200 tons, 6.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,267 lbs / 575 Kg = 27.8 x 4.5 " / 114 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 2.2 ft / 0.7 m
Roll period: 12.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.25
Seaboat quality (Average = 1.00): 1.07

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.474
Length to Beam Ratio: 9.85 : 1
'Natural speed' for length: 23.67 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.43 ft / 7.75 m
- Forecastle (25 %): 22.97 ft / 7.00 m
- Mid (50 %): 20.51 ft / 6.25 m (13.12 ft / 4.00 m aft of break)
- Quarterdeck (15 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 17.98 ft / 5.48 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 152.3 %
- Above water (accommodation/working, high = better): 149.8 %
Waterplane Area: 12,496 Square feet or 1,161 Square metres
Displacement factor (Displacement / loading): 101 %
Structure weight / hull surface area: 39 lbs/sq ft or 191 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.51
- Longitudinal: 1.47
- Overall: 0.56
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Quoted

Originally posted by The Rock Doctor
Why so much bunkerage? Ireland's international trade routes can't be that long...

Quoted

Originally posted by The Rock Doctor
Seems like overkill to me. American destroyers of this era had considerably less bunkerage, and they were tasked with running around with carrier groups all the time.

Quoted

[SIZE=3]Deirdre-class, Irish Destroyer laid down 1944[/SIZE]

Displacement:
2,500 t light; 2,661 t standard; 3,189 t normal; 3,611 t full load

Dimensions: Length overall / water x beam x draught
437.40 ft / 426.51 ft x 43.31 ft x 13.12 ft (normal load)
133.32 m / 130.00 m x 13.20 m x 4.00 m

Armament:
6 - 4.50" / 114 mm guns (3x2 guns), 45.00lbs / 20.41kg shells, 1944 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1944 Model
Anti-aircraft guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
2 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1944 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, all raised mounts
4 - 0.66" / 16.8 mm guns in single mounts, 0.14lbs / 0.06kg shells, 1944 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 282 lbs / 128 kg
Shells per gun, main battery: 600
5 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.79" / 20 mm 0.39" / 10 mm 0.39" / 10 mm
3rd: 0.79" / 20 mm 0.39" / 10 mm 0.39" / 10 mm
4th: 0.59" / 15 mm - -

- Conning tower: 1.18" / 30 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 2 shafts, 53,620 shp / 40,000 Kw = 34.34 kts
Range 6,500nm at 18.00 kts
Bunker at max displacement = 950 tons

Complement:
211 - 275

Cost:
£2.071 million / $8.285 million

Distribution of weights at normal displacement:
Armament: 36 tons, 1.1 %
Armour: 26 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 20 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.2 %
Machinery: 1,360 tons, 42.6 %
Hull, fittings & equipment: 879 tons, 27.6 %
Fuel, ammunition & stores: 689 tons, 21.6 %
Miscellaneous weights: 200 tons, 6.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,197 lbs / 543 Kg = 26.3 x 4.5 " / 114 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.25
Metacentric height 2.1 ft / 0.7 m
Roll period: 12.4 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.25
Seaboat quality (Average = 1.00): 1.08

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.460
Length to Beam Ratio: 9.85 : 1
'Natural speed' for length: 23.71 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.43 ft / 7.75 m
- Forecastle (25 %): 22.97 ft / 7.00 m
- Mid (50 %): 20.51 ft / 6.25 m (13.12 ft / 4.00 m aft of break)
- Quarterdeck (15 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 17.98 ft / 5.48 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 155.7 %
- Above water (accommodation/working, high = better): 151.5 %
Waterplane Area: 12,348 Square feet or 1,147 Square metres
Displacement factor (Displacement / loading): 98 %
Structure weight / hull surface area: 40 lbs/sq ft or 194 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.51
- Longitudinal: 1.52
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Quoted

[SIZE=3]Deirdre's Big Sister, Irish Destroyer laid down 1944[/SIZE]

Displacement:
2,650 t light; 2,848 t standard; 3,395 t normal; 3,833 t full load

Dimensions: Length overall / water x beam x draught
454.11 ft / 442.91 ft x 45.28 ft x 13.12 ft (normal load)
138.41 m / 135.00 m x 13.80 m x 4.00 m

Armament:
6 - 5.50" / 140 mm guns (3x2 guns), 83.19lbs / 37.73kg shells, 1944 Model
Automatic rapid fire guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1944 Model
Anti-aircraft guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
2 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1944 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, all raised mounts
4 - 0.66" / 16.8 mm guns in single mounts, 0.14lbs / 0.06kg shells, 1944 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 511 lbs / 232 kg
Shells per gun, main battery: 450
5 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.79" / 20 mm 0.39" / 10 mm 0.39" / 10 mm
3rd: 0.79" / 20 mm 0.39" / 10 mm 0.39" / 10 mm
4th: 0.59" / 15 mm - -

- Conning tower: 1.18" / 30 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 2 shafts, 53,619 shp / 40,000 Kw = 34.21 kts
Range 6,500nm at 18.00 kts
Bunker at max displacement = 985 tons

Complement:
222 - 289

Cost:
£2.321 million / $9.283 million

Distribution of weights at normal displacement:
Armament: 76 tons, 2.3 %
Armour: 55 tons, 1.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 49 tons, 1.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.2 %
Machinery: 1,343 tons, 39.6 %
Hull, fittings & equipment: 975 tons, 28.7 %
Fuel, ammunition & stores: 745 tons, 21.9 %
Miscellaneous weights: 200 tons, 5.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,255 lbs / 569 Kg = 15.1 x 5.5 " / 140 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 2.2 ft / 0.7 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 69 %
- Recoil effect (Restricted arc if above 1.00): 0.42
Seaboat quality (Average = 1.00): 1.12

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.452
Length to Beam Ratio: 9.78 : 1
'Natural speed' for length: 24.20 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 62
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.25 ft / 8.00 m
- Forecastle (25 %): 23.79 ft / 7.25 m
- Mid (50 %): 21.33 ft / 6.50 m (13.94 ft / 4.25 m aft of break)
- Quarterdeck (15 %): 13.94 ft / 4.25 m
- Stern: 13.94 ft / 4.25 m
- Average freeboard: 18.80 ft / 5.73 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 154.0 %
- Above water (accommodation/working, high = better): 165.7 %
Waterplane Area: 13,304 Square feet or 1,236 Square metres
Displacement factor (Displacement / loading): 94 %
Structure weight / hull surface area: 41 lbs/sq ft or 201 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.48
- Longitudinal: 1.46
- Overall: 0.54
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent

Quoted

Cross-sectional: 0.48

Quoted

Originally posted by Rooijen10

Quoted

Cross-sectional: 0.48

Might be a good idea to keep that at 0.50 or above.

Quoted

Originally posted by Rooijen10
Got a list of all the extra goodies she carries? (a.k.a breakdown of the miscellaneous weights)

Quoted

Originally posted by Desertfox
Is there a reason why the newest Irish destroyers have 5/38s, while the other Irish ships have 4.5" or 5.12" guns? Seems like an unnecessary logistical complication.

Quoted

Originally posted by thesmilingassassin
What happened to the 5.1" armed ship?