WesWorld

There seems to be a few escort designs around lately so why not jump on the bandwagon? Actually i've had these on my PC for some time now and I've updated the designs in the light of newer weapons that are available. Both share the same hull but both have different roles.

Both turrets on both are above the main deck.

Granville, Guerrico, Argentina Destroyer laid down 1934

Displacement:
1,034 t light; 1,086 t standard; 1,239 t normal; 1,361 t full load

Dimensions: Length overall / water x beam x draught
332.79 ft / 327.43 ft x 29.53 ft x 10.17 ft (normal load)
101.43 m / 99.80 m x 9.00 m x 3.10 m

Armament:
4 - 4.53" / 115 mm guns (2x2 guns), 55.12lbs / 25.00kg shells, 1934 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1934 Model
Anti-aircraft guns in deck mounts
on side, all aft, 2 raised mounts - superfiring
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1934 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, 2 raised mounts - superfiring
Weight of broadside 234 lbs / 106 kg
Shells per gun, main battery: 200
4 - 23.6" / 599.44 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm 0.79" / 20 mm
2nd: 0.39" / 10 mm - -
3rd: 0.47" / 12 mm - -

- Conning tower: 2.76" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 17,000 shp / 12,682 Kw = 28.16 kts
Range 4,250nm at 15.00 kts
Bunker at max displacement = 275 tons

Complement:
103 - 135

Cost:
£0.616 million / $2.465 million

Distribution of weights at normal displacement:
Armament: 25 tons, 2.0 %
Armour: 17 tons, 1.4 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 10 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 7 tons, 0.6 %
Machinery: 489 tons, 39.5 %
Hull, fittings & equipment: 463 tons, 37.4 %
Fuel, ammunition & stores: 205 tons, 16.5 %
Miscellaneous weights: 40 tons, 3.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
595 lbs / 270 Kg = 12.8 x 4.5 " / 115 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.29
Metacentric height 1.3 ft / 0.4 m
Roll period: 11.0 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.77
Seaboat quality (Average = 1.00): 1.76

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.441
Length to Beam Ratio: 11.09 : 1
'Natural speed' for length: 18.09 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 29
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.01 ft / 6.10 m
- Forecastle (15 %): 18.04 ft / 5.50 m
- Mid (50 %): 13.78 ft / 4.20 m
- Quarterdeck (15 %): 13.78 ft / 4.20 m
- Stern: 13.78 ft / 4.20 m
- Average freeboard: 15.28 ft / 4.66 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 147.5 %
- Above water (accommodation/working, high = better): 107.6 %
Waterplane Area: 6,123 Square feet or 569 Square metres
Displacement factor (Displacement / loading): 100 %
Structure weight / hull surface area: 33 lbs/sq ft or 160 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 3.03
- Overall: 0.59
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

A general purpose escort with a good mix of AA/ASW and AS capability with the new 115mm gun and torpedoes.



Ferre Class, Argentina Frigate laid down 1934

Displacement:
1,038 t light; 1,077 t standard; 1,239 t normal; 1,368 t full load

Dimensions: Length overall / water x beam x draught
332.79 ft / 327.43 ft x 29.53 ft x 10.17 ft (normal load)
101.43 m / 99.80 m x 9.00 m x 3.10 m

Armament:
4 - 3.94" / 100 mm guns (2x2 guns), 30.51lbs / 13.84kg shells, 1934 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts - superfiring
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1934 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1934 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, 2 raised mounts - superfiring
Weight of broadside 129 lbs / 59 kg
Shells per gun, main battery: 200

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm 0.79" / 20 mm
2nd: 0.39" / 10 mm - -

- Conning tower: 2.76" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 17,000 shp / 12,682 Kw = 28.16 kts
Range 4,500nm at 15.00 kts
Bunker at max displacement = 291 tons

Complement:
103 - 135

Cost:
£0.581 million / $2.324 million

Distribution of weights at normal displacement:
Armament: 16 tons, 1.3 %
Armour: 15 tons, 1.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 8 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 7 tons, 0.6 %
Machinery: 489 tons, 39.5 %
Hull, fittings & equipment: 432 tons, 34.9 %
Fuel, ammunition & stores: 201 tons, 16.3 %
Miscellaneous weights: 85 tons, 6.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
625 lbs / 283 Kg = 20.5 x 3.9 " / 100 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.29
Metacentric height 1.3 ft / 0.4 m
Roll period: 11.0 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.43
Seaboat quality (Average = 1.00): 1.80

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.441
Length to Beam Ratio: 11.09 : 1
'Natural speed' for length: 18.09 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 28
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.01 ft / 6.10 m
- Forecastle (15 %): 18.04 ft / 5.50 m
- Mid (50 %): 13.78 ft / 4.20 m
- Quarterdeck (15 %): 13.78 ft / 4.20 m
- Stern: 13.78 ft / 4.20 m
- Average freeboard: 15.28 ft / 4.66 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 145.6 %
- Above water (accommodation/working, high = better): 168.1 %
Waterplane Area: 6,123 Square feet or 569 Square metres
Displacement factor (Displacement / loading): 103 %
Structure weight / hull surface area: 31 lbs/sq ft or 150 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.51
- Longitudinal: 2.93
- Overall: 0.61
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Designed for an Italian A/S mortar system and sonar etc and lighter guns to save weight.

Any thoughts/ideas?

So what's the designed role for these ships? Fleet escort, convoy escort, etc? The top speed seems to suggest fleet escort, but it's perhaps a bit low for that role.

Basically the light units in my fleet are seperated as this;

130mm DD for attacking enemy fleet/ships with guns and torpedoes.

115mm DD for fleet protection.

Older DD for escorting other naval forces and attacking enemy ships close to shore.

Torpedo Boats for defence of coast and attacking invading forces close to shore allied with aircraft, Indomita Class also escort other naval forces.

Chaco and Guradia to escort merchant convoys and minesweeping etc to keep sea routes open.

These four ships would form a new independent hunting formation to seek out and destroy enemy subs. They may escort a convoy (unlikely given I lack overseas territory) or be part of a DD force. They are for ASW with enough firepower to see off most attackers.

I think you'll be needing stronger hulls for these vessels. Different L:B ratio as well. 28knts is a bit in between things as well. 30knts+ or 15-20knts unless there is a special need.

I might make them less chunky when they actually get built.

I feel 25-28kts a good compromise. It can chase a surfaced sub easily and most other smaller escorts/sloops it encounters. It allows for less complex and more compact engine spaces. I agree it can't fight faster pure DD types but in rougher sea states it can probably make more speed than a destroyer.

Is splitting into two types a good move or should I just go for the A/S variant?