Byzantine Empire 1936 - 1937

[Jefgte]

Another gunboat for Red Sea & all Indian ocean colonial places.

TGB1280, Byzantine Empire TGB1280 laid down 1937
Displacement:
   1 280 t light; 1 385 t standard; 1 527 t normal; 1 640 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (325,78 ft / 321,52 ft) x 33,46 ft x (10,94 / 11,52 ft)
   (99,30 m / 98,00 m) x 10,20 m  x (3,33 / 3,51 m)

Armament:
      4 - 5,24" / 133 mm 50,0 cal guns - 80,01lbs / 36,29kg shells, 340 per gun
     Dual purpose guns in deck mounts, 1937 Model
     2 x 2-gun mounts on centreline ends, evenly spread
      4 - 1,57" / 40,0 mm 39,0 cal guns - 2,01lbs / 0,91kg shells, 1 500 per gun
     Anti-air guns in deck mounts, 1937 Model
     4 x 2-gun mounts on centreline, aft deck aft
      2 raised mounts - superfiring
      4 - 1,57" / 40,0 mm 39,0 cal guns - 2,01lbs / 0,91kg shells, 1 500 per gun
     Anti-air guns in deck mounts, 1937 Model
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts
      4 - 0,50" / 12,7 mm 62,0 cal guns - 0,07lbs / 0,03kg shells, 3 000 per gun
     Machine guns in deck mounts, 1937 Model
     2 x 2-gun mounts on sides, forward deck centre
      2 raised mounts
      Weight of broadside 336 lbs / 153 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,24" / 6 mm         -               -
   3rd:   0,24" / 6 mm         -               -
   4th:   0,24" / 6 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 26 315 shp / 19 631 Kw = 30,00 kts
   Range 6 000nm at 12,00 kts
   Bunker at max displacement = 256 tons

Complement:
   121 - 158

Cost:
   £0,859 million / $3,436 million

Distribution of weights at normal displacement:
   Armament: 66 tons, 4,4 %
      - Guns: 66 tons, 4,4 %
   Armour: 4 tons, 0,3 %
      - Armament: 4 tons, 0,3 %
   Machinery: 684 tons, 44,8 %
   Hull, fittings & equipment: 474 tons, 31,1 %
   Fuel, ammunition & stores: 247 tons, 16,2 %
   Miscellaneous weights: 51 tons, 3,3 %
      - On freeboard deck: 44 tons
      - Above deck: 7 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     659 lbs / 299 Kg = 9,2 x 5,2 " / 133 mm shells or 0,3 torpedoes
   Stability (Unstable if below 1.00): 1,17
   Metacentric height 1,3 ft / 0,4 m
   Roll period: 12,4 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0,34
   Seaboat quality  (Average = 1.00): 1,04

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,454 / 0,463
   Length to Beam Ratio: 9,61 : 1
   'Natural speed' for length: 17,93 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 12,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   22,00 %,  20,01 ft / 6,10 m,  16,24 ft / 4,95 m
      - Forward deck:   30,00 %,  16,24 ft / 4,95 m,  12,63 ft / 3,85 m
      - Aft deck:   28,00 %,  12,63 ft / 3,85 m,  11,65 ft / 3,55 m
      - Quarter deck:   20,00 %,  11,65 ft / 3,55 m,  11,65 ft / 3,55 m
      - Average freeboard:      13,96 ft / 4,26 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 159,2 %
      - Above water (accommodation/working, high = better): 136,5 %
   Waterplane Area: 6 886 Square feet or 640 Square metres
   Displacement factor (Displacement / loading): 91 %
   Structure weight / hull surface area: 40 lbs/sq ft or 196 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,66
      - Longitudinal: 2,26
      - Overall: 0,75
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

AD
0t for SR Marconi
7t for 1930 fire control
OD
12 tons for 4TTx533
10t for 1930 sonar
5t for 50 DC
2t for 2xY  DC
15t reserve for paravanes, new material, armament.
HA
climatisation

[Kaiser Kirk]

Interesting little Cruiser. Could work as a Destroyer Escort very easily.

I suspect it started as a Destroyer and the engines were de-rated to get  to 0.75
It does have 'Electric Drive' toggled, and no weight set aside for it.

[Kaiser Kirk]

The destroyer looks good.

I don't care for the cruiser's belt height or speed, but it's 2,000 t smaller than what I built, so the economics may be favorable.

We've never really settled on 'good amount' for Night fighting.
I figure some searchlights and a light starshell projector come with the hull, fittings & equipment.
The low end is random tonnage allocated.
'adequate' is equal to FC up to 25t
and 25t+ is the RN's searchlight tower or equivalent.

So 5t vs 6 for FC is from my perspective, which is an unofficial one, a little odd.

As for the Cruiser, it reminds me of one of the Martime Patrol Frigate options I posted a while back.
It's quite hard to make the weights work at that range.

Presuming the weatherdeck aft at 4.72m has a standard 2.44m deck under it (Parthian are typically 2.5),
then the next deck  is at 2.28m, and the belt covers to -0.42m.
That seems a little shallow.
Presumable short range action vs. QF guns is expected, so it does not need to be battleship-deep, but
I think the lowest I have gone is 0.5, but 0.75 or 1.0 is more typical for cruiser-types.

I know the faster a ship goes, the wave period along the side matters, as the troughs may expose the lower edge of the hull, and then the roll side to side can expose some.  I do not know how to calculate that though.

Speedwise both the Parthians and Byzantines are slow compared to many*. 30 knots means that my cruisers up through the Royal Nissean class can not over take.

*I find the guns/armor/speed trade offs fascinating :)

[Jefgte]

...It does have 'Electric Drive' toggled, and no weight set aside for it...

SS corrected
"Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 26 315 shp / 19 631 Kw = 30,00 kts
   Range 6 000nm at 12,00 kts
   Bunker at max displacement = 256 tons"

---------------------

Considering the Byzantine colonies spread across the world, I prefer 3 x 1330t TGB to 1 x 4000t cruiser

[Kaiser Kirk]

I fielded the Sibari class for a while, and then dropped down to the Hukar as more affordable.
The issue I had was that instead of 2 Hukars for 1 Sibari...I built 1 Hukar a year.

[Jefgte]

The rate of fire of the 3T2x133 and the maximum range of 21,000m are a significant advantages for this 30kt colonial gunboat, less than 1,500t.

TGB1440, Byzantine Empire 30kts TGB laid down 1937

Displacement:
    1 440 t light; 1 583 t standard; 1 712 t normal; 1 815 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
    (338,97 ft / 334,65 ft) x 35,24 ft x (10,91 / 11,38 ft)
    (103,32 m / 102,00 m) x 10,74 m  x (3,32 / 3,47 m)

Armament:
      6 - 5,24" / 133 mm 50,0 cal guns - 80,01lbs / 36,29kg shells, 340 per gun
      Dual purpose guns in deck mounts, 1937 Model
      3 x 2-gun mounts on centreline ends, majority forward
        1 raised mount - superfiring
      4 - 1,57" / 40,0 mm 39,0 cal guns - 2,01lbs / 0,91kg shells, 2 000 per gun
      Anti-air guns in deck mounts, 1937 Model
      2 x 2-gun mounts on sides, forward deck centre
        2 raised mounts
      4 - 1,57" / 40,0 mm 39,0 cal guns - 2,01lbs / 0,91kg shells, 2 000 per gun
      Anti-air guns in deck mounts, 1937 Model
      2 x 2-gun mounts on sides, aft deck aft
        2 raised mounts
      4 - 0,50" / 12,7 mm 62,0 cal guns - 0,07lbs / 0,03kg shells, 3 000 per gun
      Machine guns in deck mounts, 1937 Model
      2 x 2-gun mounts on sides, forward deck centre
        2 raised mounts
      Weight of broadside 496 lbs / 225 kg

Armour:
  - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    0,79" / 20 mm          -                  -
    2nd:    0,24" / 6 mm          -                  -
    3rd:    0,24" / 6 mm          -                  -
    4th:    0,24" / 6 mm          -                  -

Machinery:
    Oil fired boilers, steam turbines,
    Geared drive, 2 shafts, 27 957 shp / 20 856 Kw = 30,00 kts
    Range 5 000nm at 12,00 kts
    Bunker at max displacement = 232 tons

Complement:
    133 - 173

Cost:
    £0,973 million / $3,892 million

Distribution of weights at normal displacement:
    Armament: 98 tons, 5,7 %
      - Guns: 98 tons, 5,7 %
    Armour: 9 tons, 0,5 %
      - Armament: 9 tons, 0,5 %
    Machinery: 736 tons, 43,0 %
    Hull, fittings & equipment: 541 tons, 31,6 %
    Fuel, ammunition & stores: 272 tons, 15,9 %
    Miscellaneous weights: 57 tons, 3,3 %
      - On freeboard deck: 47 tons
      - Above deck: 10 tons

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      767 lbs / 348 Kg = 10,7 x 5,2 " / 133 mm shells or 0,4 torpedoes
    Stability (Unstable if below 1.00): 1,16
    Metacentric height 1,4 ft / 0,4 m
    Roll period: 12,6 seconds
    Steadiness    - As gun platform (Average = 50 %): 71 %
            - Recoil effect (Restricted arc if above 1.00): 0,49
    Seaboat quality  (Average = 1.00): 1,07

Hull form characteristics:
    Hull has a flush deck,
      a ram bow and a cruiser stern
    Block coefficient (normal/deep): 0,466 / 0,473
    Length to Beam Ratio: 9,50 : 1
    'Natural speed' for length: 18,29 kts
    Power going to wave formation at top speed: 66 %
    Trim (Max stability = 0, Max steadiness = 100): 66
    Bow angle (Positive = bow angles forward): 12,00 degrees
    Stern overhang: 0,00 ft / 0,00 m
    Freeboard (% = length of deck as a percentage of waterline length):
                Fore end,    Aft end
      - Forecastle:    22,00 %,  20,34 ft / 6,20 m,  16,73 ft / 5,10 m
      - Forward deck:    30,00 %,  16,73 ft / 5,10 m,  13,12 ft / 4,00 m
      - Aft deck:    28,00 %,  13,12 ft / 4,00 m,  12,80 ft / 3,90 m
      - Quarter deck:    20,00 %,  12,80 ft / 3,90 m,  12,80 ft / 3,90 m
      - Average freeboard:        14,66 ft / 4,47 m

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 157,8 %
        - Above water (accommodation/working, high = better): 142,9 %
    Waterplane Area: 7 623 Square feet or 708 Square metres
    Displacement factor (Displacement / loading): 92 %
    Structure weight / hull surface area: 43 lbs/sq ft or 211 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,66
        - Longitudinal: 2,28
        - Overall: 0,75
    Cramped machinery, storage, compartmentation space
    Excellent accommodation and workspace room
    Ship has slow, easy roll, a good, steady gun platform

AD
0t for SR Marconi
10t for 1930 fire control
OD
12 tons for 4TTx533
10t for 1930 sonar
5t for 50 DC
2t for 2xY  DC
18t reserve for paravanes, new material, armament.
HA
climatisation

[Jefgte]

133/50 need mount and hoist to maintain the rate of fire with 36kg shells.
BP reserve allows me to go up to 1500t and 6000nm range.
I think they are excellent defenders for colonies and good support for MTB attacks.

Torpedo Gun Boat, Byzantine Empire TGB1500 laid down 1937

Displacement:
   1 500 t light; 1 610 t standard; 1 765 t normal; 1 890 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (338,97 ft / 334,65 ft) x 36,09 ft x (11,52 / 12,09 ft)
   (103,32 m / 102,00 m) x 11,00 m  x (3,51 / 3,68 m)

Armament:
      4 - 5,24" / 133 mm 50,0 cal guns - 80,01lbs / 36,29kg shells, 340 per gun
     Dual purpose guns in deck and hoist mounts, 1937 Model
     2 x 2-gun mounts on centreline ends, evenly spread
      4 - 1,57" / 40,0 mm 39,0 cal guns - 2,01lbs / 0,91kg shells, 1 500 per gun
     Anti-air guns in deck mounts, 1937 Model
     2 x 2-gun mounts on sides, forward deck aft
      2 raised mounts
      4 - 1,57" / 40,0 mm 39,0 cal guns - 2,01lbs / 0,91kg shells, 1 500 per gun
     Anti-air guns in deck mounts, 1937 Model
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts
      4 - 0,50" / 12,7 mm 62,0 cal guns - 0,07lbs / 0,03kg shells, 3 000 per gun
     Machine guns in deck mounts, 1937 Model
     2 x 2-gun mounts on sides, forward deck centre
      2 raised mounts
      Weight of broadside 336 lbs / 153 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,98" / 25 mm   0,59" / 15 mm      0,59" / 15 mm
   2nd:   0,24" / 6 mm         -               -
   3rd:   0,24" / 6 mm         -               -
   4th:   0,24" / 6 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 28 211 shp / 21 046 Kw = 30,00 kts
   Range 6 000nm at 12,00 kts
   Bunker at max displacement = 280 tons

Complement:
   136 - 177

Cost:
   £1,028 million / $4,113 million

Distribution of weights at normal displacement:
   Armament: 100 tons, 5,7 %
      - Guns: 100 tons, 5,7 %
   Armour: 12 tons, 0,7 %
      - Armament: 12 tons, 0,7 %
   Machinery: 736 tons, 41,7 %
   Hull, fittings & equipment: 603 tons, 34,2 %
   Fuel, ammunition & stores: 265 tons, 15,0 %
   Miscellaneous weights: 49 tons, 2,8 %
      - On freeboard deck: 39 tons
      - Above deck: 10 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     782 lbs / 355 Kg = 10,9 x 5,2 " / 133 mm shells or 0,4 torpedoes
   Stability (Unstable if below 1.00): 1,08
   Metacentric height 1,3 ft / 0,4 m
   Roll period: 13,5 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 ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,444 / 0,453
   Length to Beam Ratio: 9,27 : 1
   'Natural speed' for length: 18,29 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 12,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   22,00 %,  20,34 ft / 6,20 m,  16,73 ft / 5,10 m
      - Forward deck:   30,00 %,  16,73 ft / 5,10 m,  13,12 ft / 4,00 m
      - Aft deck:   28,00 %,  13,12 ft / 4,00 m,  12,80 ft / 3,90 m
      - Quarter deck:   20,00 %,  12,80 ft / 3,90 m,  12,80 ft / 3,90 m
      - Average freeboard:      14,66 ft / 4,47 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 154,8 %
      - Above water (accommodation/working, high = better): 140,6 %
   Waterplane Area: 7 666 Square feet or 712 Square metres
   Displacement factor (Displacement / loading): 91 %
   Structure weight / hull surface area: 47 lbs/sq ft or 230 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,66
      - Longitudinal: 2,27
      - Overall: 0,75
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

AD
0t for SR Marconi
10t for 1930 fire control
OD
9 tons for 3TTx533
5t for night fighting
10t for 1930 sonar
5t for 50 x 90kg DC
2t for 2xY  DC
8t reserve for paravanes, new material, armament.
HA
climatisation