Aztec Ships 1915-1917

Started by TacCovert4, December 11, 2020, 07:47:25 AM

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TacCovert4

#30
March 10, 2021, 08:14:21 PM
The Sultanate is looking towards new classes of fleet oiler/replenishment ship.  The Sojourner class is considered an unqualified success with its combination of speed and capability.  However, 8000t fleet oilers require larger docks for construction, which does not match with the needs of the Sultanate's production program.  Also, the Sultanate learned a lot from the Caicos War about operating cruisers at sea for extended periods, and a smaller fleet replenishment ship program in greater numbers would be necessary to provide for long-term operations at sea.

First Proposal:

LRO-1, Aztec Fleet Replenishment Oiler laid down 1917

Displacement:
   6,067 t light; 6,240 t standard; 7,370 t normal; 8,274 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (410.11 ft / 410.11 ft) x 50.85 ft x (19.03 / 21.01 ft)
   (125.00 m / 125.00 m) x 15.50 m  x (5.80 / 6.40 m)

Armament:
      4 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 150 per gun
     Breech loading guns in deck and hoist mounts, 1917 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      4 - 2.76" / 70.0 mm 45.0 cal guns - 10.55lbs / 4.79kg shells, 150 per gun
     Anti-air guns in deck mounts, 1917 Model
     4 x Single mounts on sides, evenly spread
      2 raised mounts
      Weight of broadside 313 lbs / 142 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.00" / 51 mm   1.00" / 25 mm      2.00" / 51 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 38,854 shp / 28,985 Kw = 26.00 kts
   Range 10,000nm at 14.00 kts
   Bunker at max displacement = 2,034 tons

Complement:
   397 - 517

Cost:
   £0.799 million / $3.197 million

Distribution of weights at normal displacement:
   Armament: 81 tons, 1.1 %
      - Guns: 81 tons, 1.1 %
   Armour: 33 tons, 0.4 %
      - Armament: 33 tons, 0.4 %
   Machinery: 1,424 tons, 19.3 %
   Hull, fittings & equipment: 1,913 tons, 26.0 %
   Fuel, ammunition & stores: 1,303 tons, 17.7 %
   Miscellaneous weights: 2,615 tons, 35.5 %
      - Hull below water: 2,000 tons
      - Hull above water: 400 tons
      - On freeboard deck: 180 tons
      - Above deck: 35 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,693 lbs / 3,943 Kg = 129.7 x 5.1 " / 130 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.39
   Metacentric height 3.2 ft / 1.0 m
   Roll period: 11.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.13
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.650 / 0.661
   Length to Beam Ratio: 8.06 : 1
   'Natural speed' for length: 20.25 kts
   Power going to wave formation at top speed: 62 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   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:   35.00 %,  22.97 ft / 7.00 m,  19.69 ft / 6.00 m
      - Forward deck:   30.00 %,  19.69 ft / 6.00 m,  16.40 ft / 5.00 m
      - Aft deck:   20.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Quarter deck:   15.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Average freeboard:      18.50 ft / 5.64 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.9 %
      - Above water (accommodation/working, high = better): 133.3 %
   Waterplane Area: 15,976 Square feet or 1,484 Square metres
   Displacement factor (Displacement / loading): 128 %
   Structure weight / hull surface area: 74 lbs/sq ft or 361 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 2.02
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

5t - 1910 FC
25t - LR Wireless
100t - Cranes
80t - 4 x 10t Landing Barges
2400t - Out-of-port Resupply
His Most Honorable Majesty,  Ali the 8th, Sultan of All Aztecs,  Eagle of the Sun, Jaguar of the Sun, Snake of the Sun, Seal of the Sun, Whale of the Sun, Defender of the Faith, Keeper of the Teachings of Allah most gracious and merciful.

TacCovert4

#31
March 10, 2021, 10:20:51 PM
And a small replenishment ship that can be made in more significant numbers, as well as utilize smaller docks for construction/repair.

RS-2, Aztec Replenishment Ship laid down 1917

Displacement:
   3,019 t light; 3,118 t standard; 3,729 t normal; 4,218 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (393.70 ft / 393.70 ft) x 32.81 ft x (13.12 / 14.68 ft)
   (120.00 m / 120.00 m) x 10.00 m  x (4.00 / 4.47 m)

Armament:
      6 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 200 per gun
     Quick firing guns in deck mounts, 1917 Model
     3 x Twin mounts on centreline ends, majority forward
      1 raised mount - superfiring
      2 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 200 per gun
     Anti-air guns in deck mounts, 1917 Model
     2 x Single mounts on sides, forward deck aft
      Weight of broadside 216 lbs / 98 kg

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 18,393 shp / 13,721 Kw = 24.00 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 1,101 tons

Complement:
   238 - 310

Cost:
   £0.385 million / $1.540 million

Distribution of weights at normal displacement:
   Armament: 37 tons, 1.0 %
      - Guns: 37 tons, 1.0 %
   Machinery: 674 tons, 18.1 %
   Hull, fittings & equipment: 944 tons, 25.3 %
   Fuel, ammunition & stores: 710 tons, 19.0 %
   Miscellaneous weights: 1,364 tons, 36.6 %
      - Hull below water: 1,065 tons
      - Hull above water: 240 tons
      - On freeboard deck: 30 tons
      - Above deck: 29 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4,386 lbs / 1,989 Kg = 143.7 x 3.9 " / 100 mm shells or 0.9 torpedoes
   Stability (Unstable if below 1.00): 1.30
   Metacentric height 1.5 ft / 0.5 m
   Roll period: 11.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 73 %
         - Recoil effect (Restricted arc if above 1.00): 0.17
   Seaboat quality  (Average = 1.00): 1.30

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.770 / 0.779
   Length to Beam Ratio: 12.00 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   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 %,  17.22 ft / 5.25 m,  17.22 ft / 5.25 m
      - Forward deck:   30.00 %,  17.22 ft / 5.25 m,  17.22 ft / 5.25 m
      - Aft deck:   35.00 %,  8.92 ft / 2.72 m,  8.92 ft / 2.72 m
      - Quarter deck:   15.00 %,  8.92 ft / 2.72 m,  8.92 ft / 2.72 m
      - Average freeboard:      13.07 ft / 3.99 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 100.3 %
      - Above water (accommodation/working, high = better): 112.6 %
   Waterplane Area: 11,035 Square feet or 1,025 Square metres
   Displacement factor (Displacement / loading): 132 %
   Structure weight / hull surface area: 51 lbs/sq ft or 251 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.17
      - 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

165t - Electric Drives
4t - 1908 FC
25t - LR Wireless
30t - Cranes and MHE
40t - Repair Facilities
200t - Stores
900t - Fuel
His Most Honorable Majesty,  Ali the 8th, Sultan of All Aztecs,  Eagle of the Sun, Jaguar of the Sun, Snake of the Sun, Seal of the Sun, Whale of the Sun, Defender of the Faith, Keeper of the Teachings of Allah most gracious and merciful.

TacCovert4

#32
March 11, 2021, 07:39:23 AM
And a slight upgrade of the ship to 4300t

RS-2, Aztec Replenishment Ship laid down 1917

Displacement:
   4,389 t light; 4,520 t standard; 5,289 t normal; 5,904 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (429.55 ft / 426.51 ft) x 45.93 ft x (13.12 / 31.97 ft)
   (130.93 m / 130.00 m) x 14.00 m  x (4.00 / 9.75 m)

Armament:
      6 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 200 per gun
     Quick firing guns in deck mounts, 1917 Model
     3 x Twin mounts on centreline ends, majority forward
      1 raised mount - superfiring
      2 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 200 per gun
     Anti-air guns in deck mounts, 1917 Model
     2 x Single mounts on sides, forward deck aft
      16 - 0.47" / 12.0 mm 70.0 cal guns - 0.06lbs / 0.03kg shells, 2,500 per gun
     Machine guns in deck mounts, 1917 Model
     8 x Twin mounts on sides, evenly spread
      Weight of broadside 217 lbs / 98 kg

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 22,851 shp / 17,047 Kw = 24.00 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 1,383 tons

Complement:
   309 - 403

Cost:
   £0.515 million / $2.058 million

Distribution of weights at normal displacement:
   Armament: 38 tons, 0.7 %
      - Guns: 38 tons, 0.7 %
   Machinery: 838 tons, 15.8 %
   Hull, fittings & equipment: 1,555 tons, 29.4 %
   Fuel, ammunition & stores: 900 tons, 17.0 %
   Miscellaneous weights: 1,959 tons, 37.0 %
      - Hull below water: 1,510 tons
      - Hull above water: 380 tons
      - On freeboard deck: 40 tons
      - Above deck: 29 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,451 lbs / 3,380 Kg = 244.2 x 3.9 " / 100 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.56
   Metacentric height 3.3 ft / 1.0 m
   Roll period: 10.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 61 %
         - Recoil effect (Restricted arc if above 1.00): 0.04
   Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.720 / 0.330
   Length to Beam Ratio: 9.29 : 1
   'Natural speed' for length: 20.65 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   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 %,  17.22 ft / 5.25 m,  17.22 ft / 5.25 m
      - Forward deck:   30.00 %,  17.22 ft / 5.25 m,  17.22 ft / 5.25 m
      - Aft deck:   35.00 %,  8.92 ft / 2.72 m,  8.92 ft / 2.72 m
      - Quarter deck:   15.00 %,  8.92 ft / 2.72 m,  8.92 ft / 2.72 m
      - Average freeboard:      13.07 ft / 3.99 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 93.1 %
      - Above water (accommodation/working, high = better): 125.7 %
   Waterplane Area: 15,983 Square feet or 1,485 Square metres
   Displacement factor (Displacement / loading): 141 %
   Structure weight / hull surface area: 70 lbs/sq ft or 340 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.14
      - Longitudinal: 0.96
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

210t - Electric Drives
4t - 1908 FC
25t - LR Wireless
30t - Cranes and MHE
80t - Repair Facilities
300t - Stores
1300t - Fuel
His Most Honorable Majesty,  Ali the 8th, Sultan of All Aztecs,  Eagle of the Sun, Jaguar of the Sun, Snake of the Sun, Seal of the Sun, Whale of the Sun, Defender of the Faith, Keeper of the Teachings of Allah most gracious and merciful.

The Rock Doctor

#33
March 11, 2021, 08:48:14 AM
The hull strengths suggest that you could probably increase it by increasing freeboard.  That would give room to stuff more payload into the ship, I imagine.

TacCovert4

#34
March 11, 2021, 10:49:04 AM
I'll have to try it
His Most Honorable Majesty,  Ali the 8th, Sultan of All Aztecs,  Eagle of the Sun, Jaguar of the Sun, Snake of the Sun, Seal of the Sun, Whale of the Sun, Defender of the Faith, Keeper of the Teachings of Allah most gracious and merciful.

TacCovert4

#35
March 11, 2021, 11:15:52 AM
Quote from: The Rock Doctor on March 11, 2021, 08:48:14 AM
The hull strengths suggest that you could probably increase it by increasing freeboard.  That would give room to stuff more payload into the ship, I imagine.

Very much correct.  Refiguring the freeboard allowed me to increase stowage, or in this case bump the firepower to something that can fend off a destroyer instead of just annoy it.

RS-2, Aztec Replenishment Ship laid down 1917

Displacement:
   4,366 t light; 4,520 t standard; 5,289 t normal; 5,904 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (429.40 ft / 426.51 ft) x 45.93 ft x (13.12 / 14.47 ft)
   (130.88 m / 130.00 m) x 14.00 m  x (4.00 / 4.41 m)

Armament:
      5 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
     Quick firing guns in deck mounts, 1917 Model
     5 x Twin mounts on centreline ends, majority forward
      2 raised mounts - superfiring
      4 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 300 per gun
     Anti-air guns in deck mounts, 1917 Model
     2 x Single mounts on sides, aft deck centre
     2 x Single mounts on sides, forward deck centre
      16 - 0.47" / 12.0 mm 70.0 cal guns - 0.06lbs / 0.03kg shells, 2,500 per gun
     Machine guns in deck mounts, 1917 Model
     8 x Twin mounts on sides, evenly spread
      Weight of broadside 400 lbs / 181 kg

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 22,851 shp / 17,047 Kw = 24.00 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 1,383 tons

Complement:
   309 - 403

Cost:
   £0.531 million / $2.122 million

Distribution of weights at normal displacement:
   Armament: 68 tons, 1.3 %
      - Guns: 68 tons, 1.3 %
   Machinery: 838 tons, 15.8 %
   Hull, fittings & equipment: 1,450 tons, 27.4 %
   Fuel, ammunition & stores: 922 tons, 17.4 %
   Miscellaneous weights: 2,011 tons, 38.0 %
      - Hull below water: 1,510 tons
      - Hull above water: 430 tons
      - On freeboard deck: 40 tons
      - Above deck: 31 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,450 lbs / 3,379 Kg = 111.1 x 5.1 " / 130 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.48
   Metacentric height 3.0 ft / 0.9 m
   Roll period: 11.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.11
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.720 / 0.729
   Length to Beam Ratio: 9.29 : 1
   'Natural speed' for length: 20.65 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   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 %,  16.40 ft / 5.00 m,  15.58 ft / 4.75 m
      - Forward deck:   30.00 %,  15.58 ft / 4.75 m,  13.94 ft / 4.25 m
      - Aft deck:   35.00 %,  13.94 ft / 4.25 m,  13.94 ft / 4.25 m
      - Quarter deck:   15.00 %,  13.94 ft / 4.25 m,  13.94 ft / 4.25 m
      - Average freeboard:      14.58 ft / 4.45 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 96.0 %
      - Above water (accommodation/working, high = better): 141.1 %
   Waterplane Area: 15,983 Square feet or 1,485 Square metres
   Displacement factor (Displacement / loading): 136 %
   Structure weight / hull surface area: 64 lbs/sq ft or 313 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.99
      - Longitudinal: 1.01
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

210t - Electric Drives
6t - 1908 FC
25t - LR Wireless
30t - Cranes and MHE
80t - Repair Facilities
350t - Stores
1300t - Fuel
His Most Honorable Majesty,  Ali the 8th, Sultan of All Aztecs,  Eagle of the Sun, Jaguar of the Sun, Snake of the Sun, Seal of the Sun, Whale of the Sun, Defender of the Faith, Keeper of the Teachings of Allah most gracious and merciful.

TacCovert4

#36
March 11, 2021, 11:30:02 AM
And the same with the 3000t variant.  Adjusting freeboard nets me just 20 tons, not enough to be useful as maintenance tonnage.....however it's enough to drop another twin 100mm mount for self defense, giving the little ship enough firepower to hopefully defend itself from a destroyer.

RS-2, Aztec Replenishment Ship laid down 1917

Displacement:
   3,012 t light; 3,118 t standard; 3,729 t normal; 4,218 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (393.70 ft / 393.70 ft) x 32.81 ft x (13.12 / 14.68 ft)
   (120.00 m / 120.00 m) x 10.00 m  x (4.00 / 4.47 m)

Armament:
      8 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 200 per gun
     Quick firing guns in deck mounts, 1917 Model
     4 x Twin mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      2 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 200 per gun
     Anti-air guns in deck mounts, 1917 Model
     2 x Single mounts on sides, forward deck centre
      Weight of broadside 281 lbs / 127 kg

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 18,393 shp / 13,721 Kw = 24.00 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 1,101 tons

Complement:
   238 - 310

Cost:
   £0.391 million / $1.563 million

Distribution of weights at normal displacement:
   Armament: 48 tons, 1.3 %
      - Guns: 48 tons, 1.3 %
   Machinery: 674 tons, 18.1 %
   Hull, fittings & equipment: 919 tons, 24.6 %
   Fuel, ammunition & stores: 717 tons, 19.2 %
   Miscellaneous weights: 1,371 tons, 36.8 %
      - Hull below water: 1,065 tons
      - Hull above water: 240 tons
      - On freeboard deck: 36 tons
      - Above deck: 30 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4,167 lbs / 1,890 Kg = 136.6 x 3.9 " / 100 mm shells or 0.9 torpedoes
   Stability (Unstable if below 1.00): 1.33
   Metacentric height 1.6 ft / 0.5 m
   Roll period: 11.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 64 %
         - Recoil effect (Restricted arc if above 1.00): 0.20
   Seaboat quality  (Average = 1.00): 1.14

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.770 / 0.779
   Length to Beam Ratio: 12.00 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   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 %,  14.76 ft / 4.50 m,  13.12 ft / 4.00 m
      - Forward deck:   30.00 %,  13.12 ft / 4.00 m,  11.48 ft / 3.50 m
      - Aft deck:   46.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
      - Quarter deck:   4.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
      - Average freeboard:      12.19 ft / 3.72 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.2 %
      - Above water (accommodation/working, high = better): 104.3 %
   Waterplane Area: 11,035 Square feet or 1,025 Square metres
   Displacement factor (Displacement / loading): 130 %
   Structure weight / hull surface area: 53 lbs/sq ft or 256 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.01
      - Longitudinal: 0.99
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room

165t - Electric Drives
5t - 1908 FC
25t - LR Wireless
36t - Cranes and MHE
40t - Repair Facilities
200t - Stores
900t - Fuel
His Most Honorable Majesty,  Ali the 8th, Sultan of All Aztecs,  Eagle of the Sun, Jaguar of the Sun, Snake of the Sun, Seal of the Sun, Whale of the Sun, Defender of the Faith, Keeper of the Teachings of Allah most gracious and merciful.

TacCovert4

#37
March 11, 2021, 11:30:17 AM
RS-2, Aztec Replenishment Ship laid down 1917

Displacement:
   3,012 t light; 3,118 t standard; 3,729 t normal; 4,218 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (393.70 ft / 393.70 ft) x 32.81 ft x (13.12 / 14.68 ft)
   (120.00 m / 120.00 m) x 10.00 m  x (4.00 / 4.47 m)

Armament:
      4 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 160 per gun
     Quick firing guns in deck mounts, 1917 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      3 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 280 per gun
     Anti-air guns in deck mounts, 1917 Model
     3 x Single mounts on sides, forward evenly spread
     1 x Single mount on centreline, forward deck centre
      1 raised mount
      12 - 0.47" / 12.0 mm 70.0 cal guns - 0.06lbs / 0.03kg shells, 2,500 per gun
     Machine guns in deck mounts, 1917 Model
     6 x Twin mounts on sides, evenly spread
      Weight of broadside 318 lbs / 144 kg

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 18,393 shp / 13,721 Kw = 24.00 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 1,101 tons

Complement:
   238 - 310

Cost:
   £0.395 million / $1.578 million

Distribution of weights at normal displacement:
   Armament: 63 tons, 1.7 %
      - Guns: 63 tons, 1.7 %
   Machinery: 674 tons, 18.1 %
   Hull, fittings & equipment: 908 tons, 24.3 %
   Fuel, ammunition & stores: 718 tons, 19.2 %
   Miscellaneous weights: 1,367 tons, 36.7 %
      - Hull below water: 1,065 tons
      - Hull above water: 240 tons
      - On freeboard deck: 30 tons
      - Above deck: 32 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4,121 lbs / 1,869 Kg = 61.5 x 5.1 " / 130 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.32
   Metacentric height 1.5 ft / 0.5 m
   Roll period: 11.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 64 %
         - Recoil effect (Restricted arc if above 1.00): 0.23
   Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.770 / 0.779
   Length to Beam Ratio: 12.00 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   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 %,  14.76 ft / 4.50 m,  13.12 ft / 4.00 m
      - Forward deck:   30.00 %,  13.12 ft / 4.00 m,  11.48 ft / 3.50 m
      - Aft deck:   46.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
      - Quarter deck:   4.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
      - Average freeboard:      12.19 ft / 3.72 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.7 %
      - Above water (accommodation/working, high = better): 104.3 %
   Waterplane Area: 11,035 Square feet or 1,025 Square metres
   Displacement factor (Displacement / loading): 130 %
   Structure weight / hull surface area: 53 lbs/sq ft or 257 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 0.99
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room

165t - Electric Drives
7t - 1908 FC
25t - LR Wireless
30t - Cranes and MHE
40t - Repair Facilities
200t - Stores
900t - Fuel
His Most Honorable Majesty,  Ali the 8th, Sultan of All Aztecs,  Eagle of the Sun, Jaguar of the Sun, Snake of the Sun, Seal of the Sun, Whale of the Sun, Defender of the Faith, Keeper of the Teachings of Allah most gracious and merciful.

TacCovert4

#38
April 05, 2021, 06:56:46 AM
With new technologies for Destroyers getting ready to emerge in the next 2 years, the Sultanate begins forays into expanded 'leader' type destroyers capable of more effective combat against other destroyer-size vessels:

DD-13, Aztec Destroyer laid down 1918

Displacement:
   1,498 t light; 1,566 t standard; 1,804 t normal; 1,994 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (391.71 ft / 387.14 ft) x 30.18 ft x (12.57 / 13.47 ft)
   (119.39 m / 118.00 m) x 9.20 m  x (3.83 / 4.11 m)

Armament:
      4 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 150 per gun
     Quick firing guns in deck and hoist mounts, 1918 Model
     2 x Twin mounts on centreline ends, evenly spread
      1 - 5.12" / 130 mm 50.0 cal gun - 70.97lbs / 32.19kg shells, 150 per gun
     Quick firing gun in deck mount, 1918 Model
     1 x Single mount on centreline, forward deck centre
      1 raised mount
      1 - 2.76" / 70.0 mm 50.0 cal gun - 11.08lbs / 5.03kg shells, 300 per gun
     Anti-air gun in deck mount, 1918 Model
     1 x Single mount on centreline, forward deck aft
      1 raised mount
      8 - 0.47" / 12.0 mm 70.0 cal guns - 0.06lbs / 0.03kg shells, 3,000 per gun
     Machine guns in deck mounts, 1918 Model
     4 x Twin mounts on sides, evenly spread
      Weight of broadside 366 lbs / 166 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.06" / 27 mm   0.79" / 20 mm      1.06" / 27 mm
   2nd:   1.06" / 27 mm   0.79" / 20 mm            -

   - Box over magazines:
   1.06" / 27 mm

   - Conning towers: Forward 1.06" / 27 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 33,672 shp / 25,119 Kw = 32.20 kts
   Range 5,000nm at 14.00 kts
   Bunker at max displacement = 428 tons

Complement:
   137 - 179

Cost:
   £0.429 million / $1.717 million

Distribution of weights at normal displacement:
   Armament: 85 tons, 4.7 %
      - Guns: 85 tons, 4.7 %
   Armour: 35 tons, 1.9 %
      - Armament: 18 tons, 1.0 %
      - Armour Deck: 14 tons, 0.8 %
      - Conning Tower: 3 tons, 0.2 %
   Machinery: 911 tons, 50.5 %
   Hull, fittings & equipment: 432 tons, 23.9 %
   Fuel, ammunition & stores: 306 tons, 17.0 %
   Miscellaneous weights: 36 tons, 2.0 %
      - Hull below water: 5 tons
      - Hull above water: 5 tons
      - On freeboard deck: 22 tons
      - Above deck: 4 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     376 lbs / 171 Kg = 5.6 x 5.1 " / 130 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 12.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.80
   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): 0.430 / 0.443
   Length to Beam Ratio: 12.83 : 1
   'Natural speed' for length: 19.68 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 15.00 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 %,  17.06 ft / 5.20 m,  16.40 ft / 5.00 m
      - Forward deck:   30.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Aft deck:   35.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Quarter deck:   15.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Average freeboard:      12.36 ft / 3.77 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 181.3 %
      - Above water (accommodation/working, high = better): 122.3 %
   Waterplane Area: 7,338 Square feet or 682 Square metres
   Displacement factor (Displacement / loading): 64 %
   Structure weight / hull surface area: 33 lbs/sq ft or 160 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.04
      - Overall: 0.54
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

16t - 1x4x 21in TT on Centerline
6t - 60 x ASW Harpoons and Lockers (planned for refit to other ASW weapons at future date)

9t - 1912 FC
5t - Space Set Aside for Hydrophones
His Most Honorable Majesty,  Ali the 8th, Sultan of All Aztecs,  Eagle of the Sun, Jaguar of the Sun, Snake of the Sun, Seal of the Sun, Whale of the Sun, Defender of the Faith, Keeper of the Teachings of Allah most gracious and merciful.

Jefgte

#39
April 05, 2021, 04:06:06 PM Last Edit: April 05, 2021, 04:13:28 PM by Jefgte
QuoteMiscellaneous weights: 36 tons, 2.0 %
      - Hull below water: 5 tons
      - Hull above water: 5 tons
      - On freeboard deck: 22 tons
      - Above deck: 4 tons
----------------
16t - 1x4x 21in TT on Centerline
6t - 60 x ASW Harpoons and Lockers (planned for refit to other ASW weapons at future date)

9t - 1912 FC
5t - Space Set Aside for Hydrophones

36t is short
just 4xTT
& 20t reserved...

IMO, decrease the speed to 32kts & remove 1x130mm gun to have more weight reserve for futur armaments or materials (6xTT, DC, AA guns...)

=> In general, reserve weight will be very useful for weapon modifications and the addition of modern equipment ... later   ;)
"You French are fighting for money, while we English are fighting for honor!"
"Everyone is fighting for what they miss. "
Surcouf

TacCovert4

#40
April 05, 2021, 05:02:09 PM
Well, the superfiring 130 can be removed later if more AA space is needed.  Heck the TT could be removed if necessary.

The ASW weight is sufficient for basic asw equipment,  which is all that is being planned for this class. 

Its meant to be a gunfighter for taking on larger destroyers primarily,  not for True general purpose work.  Which is why only one quad launcher is carried.   Conversely the fast GTB type vessels are carrying triple the torpedoes for their weight. 
His Most Honorable Majesty,  Ali the 8th, Sultan of All Aztecs,  Eagle of the Sun, Jaguar of the Sun, Snake of the Sun, Seal of the Sun, Whale of the Sun, Defender of the Faith, Keeper of the Teachings of Allah most gracious and merciful.
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