WesWorld

Torpedo Boat to me implies that their mission is operating with the battle fleet. Standard fleet cruising speed for the Russian Navy is 15 knots, possibly going to 18 knots by the late 1930s, and these little ships won't have a very useful range at that speed. My intention is to use them more for convoy escorts or patrolling on the high seas. They have torpedos in order to deter surface raiders. But they'll do nicely escorting 8-10 knot convoys or keeping an eye on pieces of ocean.

Surface raiders where? In the Black Sea? A lightly built 600ton vessel is not an Oceanic or really even Sea-going warship.

There seems to be a lot of potential surface raiders starting to be designed in the Black Sea and Baltic Seas, plus you have the Med. to worry about. The Russians likely need to keep the sealanes open to their ally France. There is a lot of potenally hostile water between Russia and France. A lot of it goes past Italy.

In the Great War, ships this size did have a lot of trouble keeping up with capital ships going 18-20 knots in heavy seas. Escorting an 8-10 knot convoy is a much less strenuous mission (Until S&G show up).

Quoted

Escorting an 8-10 knot convoy is a much less strenuous mission

The problem is in having machinery giving turns for 30knts you get small, powerful and lightweight machinery. This is simply not suited for continuous operation at 10knts. Mechanical problems would be enormous in addition just to vessels of this size's lack of seakeeping ability. Rolling in wet grass is the phrase. You want a slow escort vessel, put reciprocating machinery in it and make it bigger.

Quoted

The problem is in having machinery giving turns for 30knts you get small, powerful and lightweight machinery. This is simply not suited for continuous operation at 10knts. Mechanical problems would be enormous in addition just to vessels of this size's lack of seakeeping ability

There's no shortage of 600-ton, 30 knot ships with 3000-5000 nm range at 10-12 knots in the WesWorld, and this has been the case for some time now.

And there certainly was no shortage of fast ships of similar size in the Great War. Were they pleasant to be on? No. But they had a mission to do.

If I have to, I'll list them...

Quoted

There's no shortage of 600-ton, 30 knot ships with 3000-5000 nm range at 10-12 knots in the WesWorld, and this has been the case for some time now.

And...They're all equally bad, some more than others. They proved to be expensive and poorly suited to escort roles. They are better as actual torpedo boats but far too costly for the capability they provide.

A single Alligator class transport and four assault boats will be built in 1931 in order to exercise developing amphibious warfare concepts.

Alligator class, Russian Naval Infantry Transport laid down 1931

Displacement:
957 t light; 983 t standard; 1,186 t normal; 1,348 t full load

Dimensions: Length overall / water x beam x draught
230.29 ft / 229.66 ft x 45.93 ft x 6.40 ft (normal load)
70.19 m / 70.00 m x 14.00 m x 1.95 m

Armament:
4 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Aft Main mounts separated by engine room
Weight of broadside 6 lbs / 3 kg
Shells per gun, main battery: 500

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 1,969 shp / 1,469 Kw = 15.00 kts
Range 8,200nm at 12.00 kts
Bunker at max displacement = 366 tons

Complement:
100 - 131

Cost:
£0.185 million / $0.740 million

Distribution of weights at normal displacement:
Armament: 1 tons, 0.1 %
Machinery: 59 tons, 5.0 %
Hull, fittings & equipment: 448 tons, 37.7 %
Fuel, ammunition & stores: 229 tons, 19.3 %
Miscellaneous weights: 450 tons, 37.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,667 lbs / 1,663 Kg = 2,372.7 x 1.5 " / 37 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.33
Metacentric height 2.6 ft / 0.8 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.60

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.615
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 15.15 kts
Power going to wave formation at top speed: 47 %
Trim (Max stability = 0, Max steadiness = 100): 44
Bow angle (Positive = bow angles forward): 2.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.04 ft / 5.50 m
- Forecastle (20 %): 11.48 ft / 3.50 m
- Mid (50 %): 11.48 ft / 3.50 m
- Quarterdeck (15 %): 11.48 ft / 3.50 m
- Stern: 11.48 ft / 3.50 m
- Average freeboard: 12.01 ft / 3.66 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 58.9 %
- Above water (accommodation/working, high = better): 171.1 %
Waterplane Area: 7,824 Square feet or 727 Square metres
Displacement factor (Displacement / loading): 207 %
Structure weight / hull surface area: 45 lbs/sq ft or 219 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.06
- 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, can fire her guns in the heaviest weather

This ship will carry a Naval Infantry Rifle Company and 4 Assault Boats.



Assault Boat, Russian Landing Boat laid down 1931

Displacement:
15 t light; 16 t standard; 16 t normal; 16 t full load

Dimensions: Length overall / water x beam x draught
42.65 ft / 42.65 ft x 9.84 ft x 1.57 ft (normal load)
13.00 m / 13.00 m x 3.00 m x 0.48 m

Armament:
1 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1931 Model
Machine gun in deck mount
on side forward, 1 raised gun
1 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1931 Model
Breech loading gun in deck mount
on centreline aft
Weight of broadside 0 lbs / 0 kg
Shells per gun, main battery: 2,000

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.20" / 5 mm 42.65 ft / 13.00 m 4.92 ft / 1.50 m
Ends: 0.47" / 12 mm 9.84 ft / 3.00 m 6.56 ft / 2.00 m
Main Belt covers 154 % of normal length

Machinery:
Diesel Internal combustion motors,
Geared drive, 1 shaft, 20 shp / 15 Kw = 8.00 kts
Range 100nm at 8.00 kts
Bunker at max displacement = 0 tons

Complement:
3 - 5

Cost:
£0.003 million / $0.011 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.1 %
Armour: 3 tons, 16.9 %
- Belts: 3 tons, 16.6 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.4 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1 tons, 3.7 %
Hull, fittings & equipment: 7 tons, 43.4 %
Fuel, ammunition & stores: 1 tons, 4.8 %
Miscellaneous weights: 5 tons, 31.1

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
77 lbs / 35 Kg = 1,230.9 x 0.5 " / 13 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 0.2 ft / 0.1 m
Roll period: 9.5 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.65

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.850
Length to Beam Ratio: 4.33 : 1
'Natural speed' for length: 7.74 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 31
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: 6.56 ft / 2.00 m
- Forecastle (20 %): 4.92 ft / 1.50 m
- Mid (50 %): 4.92 ft / 1.50 m
- Quarterdeck (15 %): 4.92 ft / 1.50 m
- Stern: 4.92 ft / 1.50 m
- Average freeboard: 5.05 ft / 1.54 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 49.6 %
- Above water (accommodation/working, high = better): 125.0 %
Waterplane Area: 400 Square feet or 37 Square metres
Displacement factor (Displacement / loading): 178 %
Structure weight / hull surface area: 10 lbs/sq ft or 50 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.75
- Longitudinal: 14.63
- Overall: 1.01

Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Warning: Armour belts longer than ship

This ship will carry the personnel and equipment of a Naval Infantry Rifle Platoon (46 men) or a Naval Infantry Heavy Weapons Platoon (46 men). The end armor represents an armored bow ramp forward 12mm thick.