Laksmanavati designs

The Rock Doctor · January 10, 2025, 06:18:50 PM

More BB and CDS

The Rock Doctor · January 10, 2025, 06:19:45 PM

CL

The Rock Doctor · January 10, 2025, 06:21:28 PM

More CL and auxiliaries

The Rock Doctor · January 10, 2025, 06:22:56 PM

More auxiliaries

The Rock Doctor · January 10, 2025, 06:24:03 PM

sweepers

The Rock Doctor · January 10, 2025, 06:24:53 PM

I don't actually remember what the "truck" is.

Jeremy · January 11, 2025, 07:09:12 AM

Thanks much

Kaiser Kirk · January 12, 2025, 12:05:01 AM

Quote from: Jeremy on January 09, 2025, 06:40:07 AM
Quote from: Jefgte on January 09, 2025, 01:06:58 AMShip equipment is governed by RULES so all SS designs have the same constraints.
EX:
"1915 ASW
1t per ASW Paravane : <=25knots..."

I based my "25 t: 1x Paravane (QD)" off the "25 t: Sweeping gear (FD)" in the original design, although I couldn't actually find that in the rules (or any minesweeping gear). I just changed it to specifically mean a paravane (although I should have specified 2x instead of 1x).

Would explosive ASW paravanes be much different in weight than minesweeping paravanes? I don't want or need the ASW version. (I won't complain about saving 23 t of weight :))

There are many miscellaneous weights that are not directly specified and remarkably difficult to find out what they should 'in reality' be.

25tons is widely used as 'sufficient' for many of them.

Amounts less than that can still be termed different types of equipment, and you'll find some small variability.

Should there be a battle between players, or players and an NPC, or a 'skirmish', then whoever is admining that battle will make that final call.

For Paravanes, 5ts for 'normal' is generally used. 1-2t for 'Light' is allowable and means they have few if any spare paravanes on board, and cables of limited length- sufficient to keep their vessel safe, but of limited use for clearing for other ships.

Jeremy · January 12, 2025, 02:16:08 PM

Quote from: Kaiser Kirk on January 12, 2025, 12:05:01 AMFor Paravanes, 5ts for 'normal' is generally used. 1-2t for 'Light' is allowable and means they have few if any spare paravanes on board, and cables of limited length- sufficient to keep their vessel safe, but of limited use for clearing for other ships.

So, 5 t would work for a coastal minesweeper then? Also fine for a fleet minesweeper or should that be more?

Kaiser Kirk · January 12, 2025, 02:23:43 PM

If you have 25t of 'minesweeping gear' that should cover everything needed for minesweeping at your tech level- including paravanes

If it's not a minesweeper, but you want paravanes, the 5t allow for a wider corridor and multiple paravanes for replacement.

Came up when Rome wanted to force passage through mined area. Though hurricanes had done most of the work.

Kaiser Kirk · January 12, 2025, 02:29:50 PM

Having cycled through the techs and research, the cycles came out for the 1925 Naval Artillery
to finish researching in 1933, allowing research on those guns and mountings to start.

That means at the end of 1935 a new series of guns became available to Laksmanavati.

So I expect a new series of classes using those guns will be laid down in 1936.

To make sure I was covering options I had to designate size ranges, but as Jeremy
indicated a desire to pick his own calibers, these really break down into guns
larger than 210mm and those smaller than 210mm.

Here's a preview of the Guns and Mountings that become available at the end of 1935

Quote
280-410mm    1925    1935    T     T    T    #    # guns
210-279mm    1925    1935            T        T                    T    Turret
101-209mm    1925    1935            M&H        M&H, PDP        M&H, M    C         C    Casement
75-100mm    1925    1935                    M&H, PDP        M&H, M    C         M&H    Mount & Hoist
30-74mm    1925    1935    M                 M         M     C         M    Mount
10-29mm    1925    1935    M                 M         M     C         PDP    Primitive DP

Jefgte · January 12, 2025, 03:50:31 PM

Here are original SS for Laksmanavati 'DD

Jeremy · January 15, 2025, 10:59:06 AM

I will be posting my tweaks to the previously designed ships. Once these are finalized, they will be what I build my navy from.

Most of the changes are standardizing the MG to 12/90 and changing the AA guns from 60/45 to 40/39. There are a few other armament tweaks and some standardization of miscellaneous weight descriptions.

1000T, Laksamanavati DD1916 laid down 1916

Displacement:
1,000 t light; 1,052 t standard; 1,165 t normal; 1,255 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(331.61 ft / 328.08 ft) x 30.25 ft x (10.27 / 10.79 ft)
(101.08 m / 100.00 m) x 9.22 m x (3.13 / 3.29 m)

Armament:
4 - 4.33" / 110 mm 45.0 cal guns - 40.96lbs / 18.58kg shells, 250 per gun
Quick firing guns in deck mounts, 1916 Model
4 x Single mounts on centreline ends, evenly spread
2 raised mounts - superfiring
6 - 1.57" / 40.0 mm 39.0 cal guns - 1.85lbs / 0.84kg shells, 900 per gun
Anti-air guns in deck mounts, 1916 Model
6 x Single mounts on side ends, majority forward
4 - 0.47" / 12.0 mm 90.0 cal guns - 0.07lbs / 0.03kg shells, 2,000 per gun
Machine guns in deck mounts, 1916 Model
4 x Single mounts on side ends, evenly spread
4 raised mounts
Weight of broadside 175 lbs / 79 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.39" / 10 mm - -
2nd: 0.39" / 10 mm - -
3rd: 0.39" / 10 mm - -

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 22,270 shp / 16,614 Kw = 30.50 kts
Range 6,000nm at 10.00 kts
Bunker at max displacement = 203 tons

Complement:
99 - 129

Cost:
£0.205 million / $0.821 million

Distribution of weights at normal displacement:
Armament: 32 tons, 2.7 %
- Guns: 32 tons, 2.7 %
Armour: 9 tons, 0.7 %
- Armament: 9 tons, 0.7 %
Machinery: 584 tons, 50.2 %
Hull, fittings & equipment: 285 tons, 24.5 %
Fuel, ammunition & stores: 165 tons, 14.1 %
Miscellaneous weights: 90 tons, 7.7 %
- On freeboard deck: 61 tons
- Above deck: 29 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
314 lbs / 143 Kg = 7.7 x 4.3 " / 110 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 1.1 ft / 0.3 m
Roll period: 12.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.27
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.400 / 0.410
Length to Beam Ratio: 10.85 : 1
'Natural speed' for length: 18.11 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.00 %, 20.01 ft / 6.10 m, 17.06 ft / 5.20 m
- Forward deck: 25.00 %, 17.06 ft / 5.20 m, 16.08 ft / 4.90 m
- Aft deck: 45.00 %, 8.20 ft / 2.50 m, 8.20 ft / 2.50 m
- Quarter deck: 15.00 %, 8.20 ft / 2.50 m, 8.86 ft / 2.70 m
- Average freeboard: 11.85 ft / 3.61 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 170.8 %
- Above water (accommodation/working, high = better): 131.5 %
Waterplane Area: 6,109 Square feet or 568 Square metres
Displacement factor (Displacement / loading): 63 %
Structure weight / hull surface area: 28 lbs/sq ft or 135 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.18
- Overall: 0.55
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform

Fittings:
-3 t: 1918 Fire control (above deck)
-25 t: L/R wireless (above deck)
-36 t: 4x3 21" TT (on deck)
-20 t: Provisions for mines or deck cargo (on deck)
-5 t: 50x 90kg DC (on deck)
-1 t: Weight reserve (above deck)

Trial speed: 31.5 kt
Bonus: 1

Jeremy · January 15, 2025, 10:59:45 AM

DD, Laksmanavati 1920 laid down 1920

Displacement:
1,498 t light; 1,559 t standard; 1,742 t normal; 1,888 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(344.68 ft / 341.21 ft) x 32.81 ft x (10.89 / 11.58 ft)
(105.06 m / 104.00 m) x 10.00 m x (3.32 / 3.53 m)

Armament:
5 - 4.33" / 110 mm 45.0 cal guns - 40.96lbs / 18.58kg shells, 200 per gun
Quick firing guns in deck mounts, 1920 Model
4 x Single mounts on centreline ends, evenly spread
2 raised mounts - superfiring
1 x Single mount on centreline, forward deck aft
1 raised mount
4 - 1.57" / 40.0 mm 39.0 cal guns - 1.85lbs / 0.84kg shells, 725 per gun
Anti-air guns in deck mounts, 1920 Model
4 x Single mounts on side ends, evenly spread
10 - 0.47" / 12.0 mm 90.0 cal guns - 0.07lbs / 0.03kg shells, 2,000 per gun
Machine guns in deck mounts, 1920 Model
3 x Single mounts on sides, evenly spread
2 x Single mounts on centreline, forward evenly spread
2 raised mounts
Weight of broadside 213 lbs / 97 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm - -

- Conning towers: Forward 1.18" / 30 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 34,580 shp / 25,796 Kw = 31.50 kts
Range 9,000nm at 10.00 kts
Bunker at max displacement = 330 tons

Complement:
134 - 175

Cost:
£0.456 million / $1.822 million

Distribution of weights at normal displacement:
Armament: 39 tons, 2.2 %
- Guns: 39 tons, 2.2 %
Armour: 18 tons, 1.0 %
- Armament: 14 tons, 0.8 %
- Conning Tower: 4 tons, 0.2 %
Machinery: 926 tons, 53.2 %
Hull, fittings & equipment: 430 tons, 24.7 %
Fuel, ammunition & stores: 244 tons, 14.0 %
Miscellaneous weights: 84 tons, 4.8 %
- On freeboard deck: 52 tons
- Above deck: 32 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
475 lbs / 215 Kg = 11.7 x 4.3 " / 110 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 1.3 ft / 0.4 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.28
Seaboat quality (Average = 1.00): 1.05

Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.500 / 0.510
Length to Beam Ratio: 10.40 : 1
'Natural speed' for length: 18.47 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 67
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 19.69 ft / 6.00 m, 19.69 ft / 6.00 m
- Forward deck: 30.00 %, 19.69 ft / 6.00 m, 19.69 ft / 6.00 m
- Aft deck: 35.00 %, 9.84 ft / 3.00 m, 9.84 ft / 3.00 m
- Quarter deck: 15.00 %, 9.84 ft / 3.00 m, 9.84 ft / 3.00 m
- Average freeboard: 14.76 ft / 4.50 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 178.4 %
- Above water (accommodation/working, high = better): 152.5 %
Waterplane Area: 7,459 Square feet or 693 Square metres
Displacement factor (Displacement / loading): 66 %
Structure weight / hull surface area: 31 lbs/sq ft or 151 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.51
- Longitudinal: 1.79
- Overall: 0.57
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform

Fittings:
-4 t: 1918 Fire Control (above deck)
-25 t: L/R wireless (above deck)
-48 t: 4x3 21" TT (above deck)
-5 t: Basic hydrophone (vital)
-4 t: 4x ASW paravanes (on deck)
-3 t: Weight reserve (above deck)

Trial speed: 32 kt
Bonus: 0.5
Range: 9900 nm (geared bonus)

Jeremy · January 15, 2025, 07:54:29 PM

1500T, Laksamanavati DD1924 laid down 1924

Displacement:
1,500 t light; 1,570 t standard; 1,773 t normal; 1,936 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(384.40 ft / 380.58 ft) x 32.81 ft x (12.43 / 13.17 ft)
(117.16 m / 116.00 m) x 10.00 m x (3.79 / 4.01 m)

Armament:
5 - 4.33" / 110 mm 45.0 cal guns - 40.96lbs / 18.58kg shells, 250 per gun
Quick firing guns in deck mounts, 1924 Model
5 x Single mounts on centreline ends, majority aft
2 raised mounts - superfiring
6 - 1.57" / 40.0 mm 39.0 cal guns - 1.85lbs / 0.84kg shells, 900 per gun
Anti-air guns in deck mounts, 1924 Model
6 x Single mounts on side ends, majority forward
2 raised mounts - superfiring
12 - 0.47" / 12.0 mm 90.0 cal guns - 0.07lbs / 0.03kg shells, 2,000 per gun
Machine guns in deck mounts, 1928 Model
6 x 2-gun mounts on side ends, majority forward
6 raised mounts
Weight of broadside 217 lbs / 98 kg

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

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 34,800 shp / 25,961 Kw = 32.50 kts
Range 10,000nm at 10.00 kts
Bunker at max displacement = 366 tons

Complement:
136 - 177

Cost:
£0.593 million / $2.370 million

Distribution of weights at normal displacement:
Armament: 40 tons, 2.2 %
- Guns: 40 tons, 2.2 %
Armour: 18 tons, 1.0 %
- Armament: 18 tons, 1.0 %
Machinery: 916 tons, 51.7 %
Hull, fittings & equipment: 431 tons, 24.3 %
Fuel, ammunition & stores: 274 tons, 15.4 %
Miscellaneous weights: 94 tons, 5.3 %
- Hull below water: 5 tons
- On freeboard deck: 60 tons
- Above deck: 29 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
449 lbs / 204 Kg = 11.1 x 4.3 " / 110 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 1.3 ft / 0.4 m
Roll period: 12.2 seconds
Steadiness - As gun platform (Average = 50 %): 80 %
- Recoil effect (Restricted arc if above 1.00): 0.27
Seaboat quality (Average = 1.00): 1.16

Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.400 / 0.412
Length to Beam Ratio: 11.60 : 1
'Natural speed' for length: 19.51 kts
Power going to wave formation at top speed: 61 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 21.65 ft / 6.60 m, 18.04 ft / 5.50 m
- Forward deck: 30.00 %, 18.04 ft / 5.50 m, 16.73 ft / 5.10 m
- Aft deck: 35.00 %, 8.86 ft / 2.70 m, 8.86 ft / 2.70 m
- Quarter deck: 15.00 %, 8.86 ft / 2.70 m, 9.51 ft / 2.90 m
- Average freeboard: 13.59 ft / 4.14 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 174.4 %
- Above water (accommodation/working, high = better): 137.7 %
Waterplane Area: 7,686 Square feet or 714 Square metres
Displacement factor (Displacement / loading): 71 %
Structure weight / hull surface area: 31 lbs/sq ft or 149 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.28
- Overall: 0.55
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform

Fittings:
-4 t: 1918 Fire Control (above deck)
-25 t: L/R wireless (above deck)
-48 t: 4x3 21" TT
-5 t: 50x 90kg DC (on deck)
-5 t: Basic hydrophone (vital)
-7 t: Weight reserve (above deck)

Trial Speed: 33 kt
Bonus: 0.5
Range: 11000 (geared bonus)