Byzantine Empire Colonial Ships

Jefgte · March 17, 2022, 05:27:22 PM

C8, Byzantine Empire Colonial Cruiser laid down 1922

Displacement:
   4 750 t light; 4 979 t standard; 5 297 t normal; 5 551 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (408,79 ft / 408,79 ft) x 53,81 ft x (17,56 / 18,18 ft)
   (124,60 m / 124,60 m) x 16,40 m x (5,35 / 5,54 m)

Armament:
6 - 7,52" / 191 mm 45,0 cal guns - 214,42lbs / 97,26kg shells, 120 per gun
     Breech loading guns in turret on barbette mounts, 1922 Model
     2 x 3-gun mounts on centreline ends, evenly spread
6 - 4,72" / 120 mm 45,0 cal guns - 53,17lbs / 24,12kg shells, 160 per gun
     Quick firing guns in deck and hoist mounts, 1922 Model
     6 x Single mounts on sides, evenly spread
2 - 3,00" / 76,2 mm 45,0 cal guns - 13,62lbs / 6,18kg shells, 200 per gun
     Anti-air guns in deck mounts, 1922 Model
     2 x Single mounts on sides, forward deck aft
      2 raised mounts
4 - 1,85" / 47,0 mm 45,0 cal guns - 3,19lbs / 1,45kg shells, 800 per gun
     Quick firing guns in deck mounts, 1922 Model
     4 x Single mounts on sides, aft evenly spread
      4 raised mounts
4 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 4 000 per gun
     Machine guns in deck mounts, 1922 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
Weight of broadside 1 646 lbs / 746 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3,94" / 100 mm   269,03 ft / 82,00 m   9,19 ft / 2,80 m
   Ends:   1,38" / 35 mm   137,80 ft / 42,00 m   7,87 ft / 2,40 m
     1,97 ft / 0,60 m Unarmoured ends
     Main Belt covers 101 % of normal length

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5,51" / 140 mm   0,98" / 25 mm      2,56" / 65 mm
   2nd:   0,39" / 10 mm     -           -
   3rd:   0,39" / 10 mm     -           -
   4th:   0,39" / 10 mm     -           -
   5th:   0,39" / 10 mm     -           -

- Protected deck - single deck:
   For and Aft decks: 1,57" / 40 mm
   Forecastle: 0,98" / 25 mm Quarter deck: 0,98" / 25 mm

- Conning towers: Forward 3,54" / 90 mm, Aft 2,76" / 70 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 34 450 shp / 25 699 Kw = 27,00 kts
   Range 5 000nm at 12,00 kts
   Bunker at max displacement = 572 tons (25% coal)

Complement:
   309 - 403

Cost:
   £1,329 million / $5,314 million

Distribution of weights at normal displacement:
   Armament: 457 tons, 8,6 %
     - Guns: 457 tons, 8,6 %
   Armour: 1 030 tons, 19,4 %
     - Belts: 465 tons, 8,8 %
     - Armament: 131 tons, 2,5 %
     - Armour Deck: 393 tons, 7,4 %
     - Conning Towers: 41 tons, 0,8 %
   Machinery: 1 196 tons, 22,6 %
   Hull, fittings & equipment: 1 920 tons, 36,3 %
   Fuel, ammunition & stores: 547 tons, 10,3 %
   Miscellaneous weights: 147 tons, 2,8 %
     - Hull below water: 23 tons
     - Hull above water: 23 tons
     - On freeboard deck: 30 tons
     - Above deck: 71 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5 962 lbs / 2 704 Kg = 28,0 x 7,5 " / 191 mm shells or 1,2 torpedoes
   Stability (Unstable if below 1.00): 1,04
   Metacentric height 2,1 ft / 0,6 m
   Roll period: 15,5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0,68
   Seaboat quality (Average = 1.00): 1,02

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,480 / 0,486
   Length to Beam Ratio: 7,60 : 1
   'Natural speed' for length: 20,22 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 68
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   17,50 %, 21,49 ft / 6,55 m, 18,54 ft / 5,65 m
     - Forward deck:   32,50 %, 18,54 ft / 5,65 m, 15,58 ft / 4,75 m
     - Aft deck:   33,00 %, 15,58 ft / 4,75 m, 15,58 ft / 4,75 m
     - Quarter deck:   17,00 %, 15,58 ft / 4,75 m, 15,58 ft / 4,75 m
     - Average freeboard:      16,79 ft / 5,12 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101,1 %
      - Above water (accommodation/working, high = better): 144,8 %
   Waterplane Area: 14 394 Square feet or 1 337 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 97 lbs/sq ft or 472 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,91
      - Longitudinal: 2,16
      - Overall: 1,00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

46t for top fire control
25t for Marconi
23t for additionnal pumps
23t for additionnal ventilation
18t for 6TTx21"
12t reserved

Jefgte · March 19, 2022, 11:34:45 AM

T950, Byzantine Empire Colonial Patrol Torpedo Boat laid down 1922

Displacement:
   950 t light; 1 005 t standard; 1 082 t normal; 1 144 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (261,81 ft / 261,81 ft) x 30,61 ft x (11,70 / 12,14 ft)
   (79,80 m / 79,80 m) x 9,33 m x (3,57 / 3,70 m)

Armament:
4 - 4,72" / 120 mm 45,0 cal guns - 53,18lbs / 24,12kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1922 Model
     2 x 2-gun mounts on centreline ends, evenly spread
1 - 3,00" / 76,2 mm 45,0 cal gun - 13,62lbs / 6,18kg shells, 250 per gun
     Anti-air gun in deck mount, 1922 Model
     1 x Single mount on centreline, aft deck aft
      1 raised mount
4 - 1,85" / 47,0 mm 50,0 cal guns - 3,35lbs / 1,52kg shells, 1 000 per gun
     Quick firing guns in deck mounts, 1922 Model
     4 x Single mounts on sides, forward deck aft
2 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 3 000 per gun
     Machine guns in deck mounts, 1922 Model
     2 x Single mounts on sides, forward deck forward
Weight of broadside 240 lbs / 109 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     -           -
   4th:   0,39" / 10 mm     -           -

Machinery:
   Coal and oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 15 000 shp / 11 190 Kw = 27,01 kts
   Range 4 800nm at 10,00 kts
   Bunker at max displacement = 140 tons (25% coal)

Complement:
   93 - 122

Cost:
   £0,318 million / $1,273 million

Distribution of weights at normal displacement:
   Armament: 64 tons, 5,9 %
     - Guns: 64 tons, 5,9 %
   Armour: 8 tons, 0,8 %
     - Armament: 8 tons, 0,8 %
   Machinery: 440 tons, 40,6 %
   Hull, fittings & equipment: 354 tons, 32,7 %
   Fuel, ammunition & stores: 132 tons, 12,2 %
   Miscellaneous weights: 84 tons, 7,8 %
     - On freeboard deck: 53 tons
     - Above deck: 31 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     461 lbs / 209 Kg = 8,7 x 4,7 " / 120 mm shells or 0,3 torpedoes
   Stability (Unstable if below 1.00): 1,02
   Metacentric height 0,9 ft / 0,3 m
   Roll period: 13,7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0,66
   Seaboat quality (Average = 1.00): 1,06

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,404 / 0,412
   Length to Beam Ratio: 8,55 : 1
   'Natural speed' for length: 16,18 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   17,50 %, 17,39 ft / 5,30 m, 14,44 ft / 4,40 m
     - Forward deck:   32,50 %, 14,44 ft / 4,40 m, 11,48 ft / 3,50 m
     - Aft deck:   32,50 %, 11,48 ft / 3,50 m, 11,48 ft / 3,50 m
     - Quarter deck:   17,50 %, 11,48 ft / 3,50 m, 11,81 ft / 3,60 m
     - Average freeboard:      12,71 ft / 3,88 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 151,5 %
      - Above water (accommodation/working, high = better): 123,8 %
   Waterplane Area: 4 945 Square feet or 459 Square metres
   Displacement factor (Displacement / loading): 81 %
   Structure weight / hull surface area: 40 lbs/sq ft or 197 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,64
      - Longitudinal: 3,14
      - Overall: 0,75
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

6t for top mast rangefinder
25t for Long Range Marconi
16t for 2x2TTx533 HW
4t for forced ventilation
15t for Ehanced Hydrophone
5t for 50x90kg DC
13t reserved for new material, armament or 12 minen.

Jefgte · March 23, 2022, 05:10:36 PM

As a replacement for the old Colonial Patrol Boats (TGB500-4x120+4TTx457-21.5kts).
Byzantium plans to build T1000-4x120+4TTx533-27kts ships suitable for patrols, escorts and able to protecting 27kts colonial cruisers against DDs/MTB.

Update T950 to T1000

T1000, Byzantine Empire Colonial Patrol Torpedo Boat laid down 1922

Displacement:
   1 000 t light; 1 056 t standard; 1 137 t normal; 1 202 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (261,81 ft / 261,81 ft) x 32,81 ft x (11,47 / 11,90 ft)
   (79,80 m / 79,80 m) x 10,00 m x (3,50 / 3,63 m)

Armament:
4 - 4,72" / 120 mm 45,0 cal guns - 53,02lbs / 24,05kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1922 Model
     2 x 2-gun mounts on centreline ends, evenly spread
1 - 3,00" / 76,2 mm 45,0 cal gun - 13,62lbs / 6,18kg shells, 250 per gun
     Anti-air gun in deck mount, 1922 Model
     1 x Single mount on centreline, aft deck aft
      1 raised mount
4 - 1,85" / 47,0 mm 50,0 cal guns - 3,35lbs / 1,52kg shells, 1 000 per gun
     Quick firing guns in deck mounts, 1922 Model
     4 x Single mounts on sides, forward deck aft
      4 raised mounts
2 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 3 000 per gun
     Machine guns in deck mounts, 1922 Model
     2 x Single mounts on sides, forward deck forward
Weight of broadside 239 lbs / 108 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     -           -
   4th:   0,39" / 10 mm     -           -

Machinery:
   Coal and oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 15 630 shp / 11 660 Kw = 27,00 kts
   Range 4 900nm at 10,00 kts
   Bunker at max displacement = 146 tons (25% coal)

Complement:
   97 - 127

Cost:
   £0,333 million / $1,331 million

Distribution of weights at normal displacement:
   Armament: 64 tons, 5,6 %
     - Guns: 64 tons, 5,6 %
   Armour: 8 tons, 0,7 %
     - Armament: 8 tons, 0,7 %
   Machinery: 465 tons, 40,9 %
   Hull, fittings & equipment: 377 tons, 33,2 %
   Fuel, ammunition & stores: 137 tons, 12,0 %
   Miscellaneous weights: 86 tons, 7,6 %
     - On freeboard deck: 56 tons
     - Above deck: 30 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     509 lbs / 231 Kg = 9,7 x 4,7 " / 120 mm shells or 0,3 torpedoes
   Stability (Unstable if below 1.00): 1,04
   Metacentric height 1,0 ft / 0,3 m
   Roll period: 13,6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0,55
   Seaboat quality (Average = 1.00): 1,02

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,404 / 0,412
   Length to Beam Ratio: 7,98 : 1
   'Natural speed' for length: 16,18 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   18,00 %, 16,90 ft / 5,15 m, 14,93 ft / 4,55 m
     - Forward deck:   33,00 %, 14,93 ft / 4,55 m, 11,98 ft / 3,65 m
     - Aft deck:   33,00 %, 11,98 ft / 3,65 m, 11,98 ft / 3,65 m
     - Quarter deck:   16,00 %, 11,98 ft / 3,65 m, 12,30 ft / 3,75 m
     - Average freeboard:      13,16 ft / 4,01 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 151,4 %
      - Above water (accommodation/working, high = better): 132,3 %
   Waterplane Area: 5 300 Square feet or 492 Square metres
   Displacement factor (Displacement / loading): 82 %
   Structure weight / hull surface area: 42 lbs/sq ft or 204 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,64
      - Longitudinal: 3,11
      - Overall: 0,75
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

5t for top mast rangefinder
25t for Long Range Marconi
16t for 1x4TTx533 HW
4t for forced ventilation
15t for Ehanced Hydrophone
5t for 50x90kg DC
16t reserved for colonial material, new armament or 16 minen.

Trial speed: 28kts
Bonus: 1

Jefgte · March 26, 2022, 05:35:09 PM

Economical for colonies, but need new 100m shipyards.

T1300 for colonies, Byzantine Empire Improved T840 (1920-840t-80m) laid down 1922

Displacement:
   1 300 t light; 1 363 t standard; 1 495 t normal; 1 601 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (327,76 ft / 327,76 ft) x 32,48 ft x (12,17 / 12,73 ft)
   (99,90 m / 99,90 m) x 9,90 m x (3,71 / 3,88 m)

Armament:
4 - 4,72" / 120 mm 45,0 cal guns - 53,03lbs / 24,05kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1922 Model
     2 x 2-gun mounts on centreline ends, evenly spread
1 - 3,00" / 76,2 mm 45,0 cal gun - 13,62lbs / 6,18kg shells, 250 per gun
     Anti-air gun in deck mount, 1922 Model
     1 x Single mount on centreline, forward deck aft
      1 raised mount
4 - 1,85" / 47,0 mm 50,0 cal guns - 3,35lbs / 1,52kg shells, 1 000 per gun
     Quick firing guns in deck mounts, 1922 Model
     4 x Single mounts on sides, forward deck aft
      4 raised mounts
2 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 4 000 per gun
     Machine guns in deck mounts, 1922 Model
     2 x Single mounts on sides, forward deck forward
Weight of broadside 239 lbs / 108 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     -           -
   4th:   0,39" / 10 mm     -           -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 30 320 shp / 22 619 Kw = 31,49 kts
   Range 4 800nm at 12,00 kts
   Bunker at max displacement = 237 tons

Complement:
   119 - 156

Cost:
   £0,469 million / $1,876 million

Distribution of weights at normal displacement:
   Armament: 64 tons, 4,3 %
     - Guns: 64 tons, 4,3 %
   Armour: 8 tons, 0,6 %
     - Armament: 8 tons, 0,6 %
   Machinery: 747 tons, 50,0 %
   Hull, fittings & equipment: 396 tons, 26,5 %
   Fuel, ammunition & stores: 195 tons, 13,0 %
   Miscellaneous weights: 85 tons, 5,7 %
     - On freeboard deck: 54 tons
     - Above deck: 31 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     380 lbs / 172 Kg = 7,2 x 4,7 " / 120 mm shells or 0,3 torpedoes
   Stability (Unstable if below 1.00): 1,08
   Metacentric height 1,1 ft / 0,3 m
   Roll period: 13,1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0,52
   Seaboat quality (Average = 1.00): 1,02

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,404 / 0,413
   Length to Beam Ratio: 10,09 : 1
   'Natural speed' for length: 18,10 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   17,50 %, 18,37 ft / 5,60 m, 15,75 ft / 4,80 m
     - Forward deck:   32,50 %, 15,75 ft / 4,80 m, 12,47 ft / 3,80 m
     - Aft deck:   32,50 %, 12,47 ft / 3,80 m, 12,47 ft / 3,80 m
     - Quarter deck:   17,50 %, 12,47 ft / 3,80 m, 12,47 ft / 3,80 m
     - Average freeboard:      13,76 ft / 4,19 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 175,8 %
      - Above water (accommodation/working, high = better): 139,7 %
   Waterplane Area: 6 568 Square feet or 610 Square metres
   Displacement factor (Displacement / loading): 63 %
   Structure weight / hull surface area: 33 lbs/sq ft or 163 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 1,88
      - Overall: 0,57
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

6t for 1918 top mast rangefinder
25t for LR marconi
24t for 2x3TTx533 HW
5t for additionnal engines ventillation
15t for improved Hydrophone
3t for 30x90kg DC
7t reserved for new material, paravanes, armament.

Trial speed: 32kts
Bonus: 0.52

The Rock Doctor · March 26, 2022, 07:37:52 PM

That's a pretty handy boat.

Kaiser Kirk · March 26, 2022, 10:05:58 PM

Quote from: Jefgte on March 26, 2022, 05:35:09 PM
Economical for colonies, but need new 100m shipyards.

I'll not comment on the details of the craft, except to say they need a row of underwater viewing ports, with thin glass scuttles.

I have been repeatedly extending dry docks and have built many new.
I am now considering pairing 20m & ~80m with the series I built in the territories.

I will note your reserved weight includes for paravanes.
Paravanes are included in the mine tech, so you can just mount them right off.

Also, I at least have reduced the ventilation tonnage on my new ships.
While we still operate in warm waters, refrigeration and cooling equipment got better in the early 1900s.
So I figure I have some active cooling ability now.

Mines came up in the Caicos war, where Snips 2t were declared the 'primitive' and good for 10knots ~200m swept.
"Advanced" can be whatever you wish, but I am going with 5 tons. These are good for 15kts

They seem related to the ASW Kites. Same concepts at least. Which is where the speeds come from

For those that don't know, basically a winged float pulls cables out from the bow of the ship, forming a <---- where the < is the paravanes and --- the hull.
That way a mine can't bump along, or be sucked to the hull

The floats can be designed to dive slightly and so be a considerable distance underwater, and the The mines slide down the paravanes where either their cables are cut by a shear.
Either way, they can be brought to the surface and shot.
Seem to have pretty effective against moored mines, but only going forward.

Not an area of expansive knowledge for me.

Jefgte · March 27, 2022, 01:17:20 AM

I think for 1300t this is a powerful torpedo boat - 2T2x120 + 2x3TTx533.
If it is necessary in the future to install new material, TT, 76.2 & 47mm guns can be reduced.

Kaiser Kirk · March 27, 2022, 12:17:51 PM

Quote from: Jefgte on March 27, 2022, 01:17:20 AM
I think for 1300t this is a powerful torpedo boat - 2T2x120 + 2x3TTx533.
If it is necessary in the future to install new material, TT, 76.2 & 47mm guns can be reduced.

Yes.
Comparable to my larger 1920 Palang Class, but 10% smaller.
The difference is largely due to my vessel having a larger fuel capacity and better seakeeping for the Pacific.

I haven't looked closely at historical ships to see the practicality of mounting a 2-gun 120mm
on a 9.9m destroyer hull, but early on the group decided that if it works in SS, it works in N7
so it does not matter.

Quote
3t for 30x90DC

Should be :
30x 90kg DC

Jefgte · March 27, 2022, 03:35:46 PM

Quote...The difference is largely due to my vessel having a larger fuel capacity ...

Colonial ships are not meant to cross oceans back and forth.
They are assigned as "Defender" to the Madagascar zones and African coasts, Australia and Brazil.

Jefgte · March 28, 2022, 12:57:05 AM

QuoteT1300 for colonies, Byzantine Empire Improved T840 (1920-840t-80m) laid down 1922

T840 series must be completed before starting T1300

=> T1300 Laid down 1923

TacCovert4 · March 28, 2022, 05:22:26 AM

Quote from: Kaiser Kirk on March 27, 2022, 12:17:51 PM
Quote from: Jefgte on March 27, 2022, 01:17:20 AM
I think for 1300t this is a powerful torpedo boat - 2T2x120 + 2x3TTx533.
If it is necessary in the future to install new material, TT, 76.2 & 47mm guns can be reduced.

Yes.
Comparable to my larger 1920 Palang Class, but 10% smaller.
The difference is largely due to my vessel having a larger fuel capacity and better seakeeping for the Pacific.

I haven't looked closely at historical ships to see the practicality of mounting a 2-gun 120mm
on a 9.9m destroyer hull, but early on the group decided that if it works in SS, it works in N7
so it does not matter.

Quote
3t for 30x90DC

Should be :
30x 90kg DC

Seems the tribal is only 1.5m wider with twins. So it should be within the realm of the possible anyway

Jefgte · April 03, 2022, 05:55:56 PM

QuoteAs a replacement for the old Colonial Patrol Boats (TGB500-4x120+4TTx457-21.5kts).
Byzantium plans to build T1000-4x120+4TTx533-27kts ships suitable for patrols, escorts and able to protecting 27kts colonial cruisers against DDs/MTB.

T1000 is too expensive for Patrols =>

P440, Byzantine Empire Patrol Boat laid down 1922

Displacement:
   380 t light; 393 t standard; 440 t normal; 477 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (163,71 ft / 163,71 ft) x 23,39 ft x (8,30 / 8,82 ft)
   (49,90 m / 49,90 m) x 7,13 m x (2,53 / 2,69 m)

Armament:
1 - 4,02" / 102 mm 45,0 cal gun - 32,66lbs / 14,81kg shells, 150 per gun
     Quick firing gun in deck mount, 1922 Model
     1 x Single mount on centreline, forward deck centre
1 - 1,85" / 47,0 mm 45,0 cal gun - 3,19lbs / 1,45kg shells, 400 per gun
     Quick firing gun in deck mount, 1922 Model
     1 x Single mount on centreline, aft deck aft
2 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 5 000 per gun
     Machine guns in deck mounts, 1922 Model
     2 x Single mounts on sides, forward deck forward
      2 raised mounts
Weight of broadside 44 lbs / 20 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm     -           -
   2nd:   0,39" / 10 mm     -           -

Machinery:
   Coal and oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 4 160 shp / 3 103 Kw = 21,05 kts
   Range 5 000nm at 10,00 kts
   Bunker at max displacement = 84 tons (25% coal)

Complement:
   47 - 62

Cost:
   £0,096 million / $0,383 million

Distribution of weights at normal displacement:
   Armament: 6 tons, 1,4 %
     - Guns: 6 tons, 1,4 %
   Armour: 1 tons, 0,3 %
     - Armament: 1 tons, 0,3 %
   Machinery: 144 tons, 32,8 %
   Hull, fittings & equipment: 173 tons, 39,2 %
   Fuel, ammunition & stores: 60 tons, 13,5 %
   Miscellaneous weights: 56 tons, 12,7 %
     - On freeboard deck: 30 tons
     - Above deck: 26 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     521 lbs / 236 Kg = 16,1 x 4,0 " / 102 mm shells or 0,4 torpedoes
   Stability (Unstable if below 1.00): 1,06
   Metacentric height 0,6 ft / 0,2 m
   Roll period: 12,3 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0,18
   Seaboat quality (Average = 1.00): 1,29

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,484 / 0,494
   Length to Beam Ratio: 7,00 : 1
   'Natural speed' for length: 12,80 kts
   Power going to wave formation at top speed: 70 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   Bow angle (Positive = bow angles forward): 0,00 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 %, 14,44 ft / 4,40 m, 12,47 ft / 3,80 m
     - Forward deck:   30,00 %, 12,47 ft / 3,80 m, 10,83 ft / 3,30 m
     - Aft deck:   30,00 %, 10,83 ft / 3,30 m, 10,83 ft / 3,30 m
     - Quarter deck:   20,00 %, 10,83 ft / 3,30 m, 10,83 ft / 3,30 m
     - Average freeboard:      11,56 ft / 3,52 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 111,0 %
      - Above water (accommodation/working, high = better): 114,5 %
   Waterplane Area: 2 515 Square feet or 234 Square metres
   Displacement factor (Displacement / loading): 122 %
   Structure weight / hull surface area: 32 lbs/sq ft or 157 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,79
      - Longitudinal: 8,18
      - Overall: 1,00
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

misc weight: 61t
1t for fire control
25t for Long Range Marconi
5t for additionnal ventilation
25t Cargo reserved in hold

=>Mercantile rules
440t x 0.25
Cost 0.11BP & 0.11$

Kaiser Kirk · April 03, 2022, 07:35:03 PM

Quote from: Jefgte on April 03, 2022, 05:55:56 PM

T1000 is too expensive for Patrols =>

P440, Byzantine Empire Patrol Boat laid down 1922

Displacement:
380 t light; 393 t standard; 440 t normal; 477 t full load

=>Mercantile rules
440t x 0.25
Cost 0.11BP & 0.11$

One question - what is the design reason for your Auxiliary to steam at 21knots like your battleline?
As an auxiliary, being able to operate with the battle line is not needed, and we are trying to keep the two separated.

On..last tuesday? I made a similar Aux Patrol craft,
with 'coast guard' / subchaser and minesweeper variants.
I toyed with speeds of 19-20 knots.
Why? Because I wanted a speed 2-3knots faster than the surfaced speed of a submarine for the 'subchaser' role.
20 knots would interoperate with my battleline, so I went slower to 'defend' the Aux designation.

Jefgte · April 04, 2022, 12:58:56 AM

QuoteOne question - what is the design reason for your Auxiliary to steam at 21knots like your battleline?

Quotemisc weight: 61t
1t for fire control
25t for Long Range Marconi
5t for additional ventilation
25t Cargo reserved in hold

25t cargo reserve could be used for temporary armament (minesweeper, ASW, AA guns...) ... if war. so 21kts is the mini speed.

Kaiser Kirk · April 04, 2022, 01:24:53 PM

Claiming 'AUX' is not automatic.
This is about avoiding use of the AUX rating to make a cheap warship

It is not a clear line in the sand. Which can be frustrating.
Plus I do not look at most ships. I'd like to but lack the time. I tend to look when called, or a different player is posting
and I wonder what the fuss is about.
So I expect that adds inconsistency.

But I believe the point of the 21 knot speed is to allow it to act as a warship in conjunction with
your battleline. Your reply that 'if war, so 21kts is the mini speed' ... confirms this.
That puts it in the 'cheap warship' category - 95t each.

Now, a fast 'cargo liner' is possible, but one with 5.6% normal as cargo is
not giving up much for it's auxiliary status.

I have used speed as a limit before - ask Foxy, he was rather unhappy with me.
I do not see a need for a AUX minesweeper or ASW vessel to make the speed of the battleline.

I can see them needing to sustain the cruise speed of the fleet indefinitely,
and so not needing more than 1/3 - 1/2 max power for cruise speed.
I can see them needing to sprint fast enough to catch a surfaced sub.
So the 17knots I gave as a limit for Foxy would have moved up to 18/19.