Torpedo-Boats, Torpedo-Boat Destroyers, and Destroyers in General

Started by The Rock Doctor, March 20, 2018, 04:30:43 PM

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The Rock Doctor

#15
Weingarten Class Torpedo-Boat

Incremental improvements on the U-class boats.

Weingarten, TB-306, laid down 1927
Weesp, TB-307, laid down 1927
Warzawa, TB-308, laid down 1927
Wilno, TB-309, laid down 1927
Winsum, TB-310, laid down 1927
Warffum, TB-311, laid down 1927
Wielkopolski, TB-312, laid down 1927
Wroclaw, TB-313, laid down 1927
Waren, TB-314, laid down 1928
Wenchi*, TB-315, laid down 1928
Wagrowiec, TB-316, laid down 1928
Wielun, TB-317, laid down 1928
Wladyslawowo, TB-318, laid down 1928
Wloclawek, TB-319, laid down 1928
Walbrzych, TB-320, laid down 1928
Xique-Xique, TB-321, laid down 1928

*Shows up as another Wielkopolski in the sim report but we can't have two, now, can we.

Enter ship name, Enter country Enter ship type laid down 1927

Displacement:
   1,928 t light; 2,018 t standard; 2,289 t normal; 2,507 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (395.26 ft / 383.86 ft) x 36.09 ft x (14.11 / 14.99 ft)
   (120.48 m / 117.00 m) x 11.00 m  x (4.30 / 4.57 m)

Armament:
      4 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1927 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      1 - 3.94" / 100.0 mm 45.0 cal gun - 30.77lbs / 13.96kg shells, 250 per gun
     Anti-air gun in deck mount, 1927 Model
     1 x Single mount on centreline, forward deck aft
      1 raised mount
      8 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1927 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 302 lbs / 137 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.18" / 30 mm   0.79" / 20 mm      1.18" / 30 mm
   2nd:   0.79" / 20 mm   0.12" / 3 mm            -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 42,896 shp / 32,000 Kw = 32.76 kts
   Range 12,000nm at 10.00 kts
   Bunker at max displacement = 489 tons

Complement:
   165 - 215

Cost:
   £0.928 million / $3.713 million

Distribution of weights at normal displacement:
   Armament: 79 tons, 3.5 %
   Armour: 25 tons, 1.1 %
      - Armament: 25 tons, 1.1 %
   Machinery: 1,144 tons, 50.0 %
   Hull, fittings & equipment: 552 tons, 24.1 %
   Fuel, ammunition & stores: 361 tons, 15.8 %
   Miscellaneous weights: 128 tons, 5.6 %
      - Hull below water: 25 tons
      - On freeboard deck: 58 tons
      - Above deck: 45 tons

Fittings:
-8 t:  1918 fire control (AD)
-25 t:  L/R wireless (AD)
-10 t:  Nightfighting doodads (AD)
-24 t:  2x3 21" TT (FD)
-15 t:  ASW munitions (FD)  (2 x Y-DCT, 39 x 280 kg DC)
-21 t:  Weight reserve (mostly FD)
-10 t:  Sonar
-15 t:  Enhanced hydrophones

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     556 lbs / 252 Kg = 8.3 x 5.1 " / 130 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.18
   Metacentric height 1.5 ft / 0.4 m
   Roll period: 12.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.47
   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): 0.410 / 0.422
   Length to Beam Ratio: 10.64 : 1
   'Natural speed' for length: 19.59 kts
   Power going to wave formation at top speed: 63 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 3.28 ft / 1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  22.31 ft / 6.80 m,  18.37 ft / 5.60 m
      - Forward deck:   28.00 %,  18.37 ft / 5.60 m,  18.37 ft / 5.60 m
      - Aft deck:   37.00 %,  10.50 ft / 3.20 m,  10.50 ft / 3.20 m
      - Quarter deck:   15.00 %,  10.50 ft / 3.20 m,  10.50 ft / 3.20 m
      - Average freeboard:      14.59 ft / 4.45 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 174.6 %
      - Above water (accommodation/working, high = better): 137.6 %
   Waterplane Area: 8,579 Square feet or 797 Square metres
   Displacement factor (Displacement / loading): 73 %
   Structure weight / hull surface area: 36 lbs/sq ft or 177 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.35
      - Overall: 0.55
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent



The Rock Doctor

#16
Zeist Class Torpedo-Boat

The Z-class torpedo-boats are, again, incremental updates on the preceding T-, U- and W- class boats but I decided to sketch this one.

It's a bit faster than the W-class because I need the engine weight to stay above 50%. 

The primary difference, really, is that the single 100mm AA is replaced with two twin 50mm/60 cal installations for a heavier volume of fire, albeit at reduced ranges.  The gun's still in development in H1/29, so the lead units will receive them via refit.

Like the W-class, a run of 16 units is anticipated.

Zeist, TB-322, laid down 1929
Zwolle, TB-233, laid down 1929
Zory, TB-234, laid down 1929
Znin, TB-235, laid down 1929
Zoukougbeu, TB-236, laid down 1929
Zuenoula, TB-237, laid down 1929
Zywiec, TB-238, laid down 1929
Zaanstad, TB-239, laid down 1929
Zirndorf, TB-240, laid down 1930
Zella-Mehlis, TB-241, laid down 1930
Zambrow, TB-242, laid down 1930
Zabludnow, TB-243, laid down 1930
Zlocienic, TB-244, laid down 1930
Zboriv, TB-245, laid down 1930
Zhytomyr, TB-244, laid down 1930
Zagore, TB-245, laid down 1930

Z-class, laid down 1929

Displacement:
   1,928 t light; 2,023 t standard; 2,289 t normal; 2,503 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (395.26 ft / 383.86 ft) x 36.09 ft x (14.11 / 14.98 ft)
   (120.48 m / 117.00 m) x 11.00 m  x (4.30 / 4.57 m)

Armament:
      4 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1929 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      4 - 1.97" / 50.0 mm 60.0 cal guns - 4.18lbs / 1.89kg shells, 1,000 per gun
     Anti-air guns in deck mounts, 1929 Model
     2 x Twin mounts on centreline, forward deck aft
      2 raised mounts
      8 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1929 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 288 lbs / 131 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.18" / 30 mm   0.79" / 20 mm      1.18" / 30 mm
   2nd:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 44,236 shp / 33,000 Kw = 33.00 kts
   Range 12,000nm at 10.00 kts
   Bunker at max displacement = 480 tons

Complement:
   165 - 215

Cost:
   £1.022 million / $4.089 million

Distribution of weights at normal displacement:
   Armament: 78 tons, 3.4 %
   Armour: 25 tons, 1.1 %
      - Armament: 25 tons, 1.1 %
   Machinery: 1,148 tons, 50.1 %
   Hull, fittings & equipment: 557 tons, 24.3 %
   Fuel, ammunition & stores: 361 tons, 15.8 %
   Miscellaneous weights: 121 tons, 5.3 %
      - Hull below water: 25 tons
      - On freeboard deck: 51 tons
      - Above deck: 45 tons

Fittings:
-8 t:  1918 fire control (AD)
-25 t:  L/R wireless (AD)
-10 t:  Nightfighting doodads (AD)
-24 t:  2x3 21" TT (FD)
-15 t:  ASW munitions (FD)  (2 x Y-DCT, 39 x 280 kg DC)
-14 t:  Weight reserve (mostly FD)
-10 t:  Sonar (BW)
-15 t:  Enhanced hydrophones (BW)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     554 lbs / 251 Kg = 8.3 x 5.1 " / 130 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.18
   Metacentric height 1.5 ft / 0.4 m
   Roll period: 12.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.46
   Seaboat quality  (Average = 1.00): 1.00

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.410 / 0.422
   Length to Beam Ratio: 10.64 : 1
   'Natural speed' for length: 19.59 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 3.28 ft / 1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  22.31 ft / 6.80 m,  18.37 ft / 5.60 m
      - Forward deck:   29.00 %,  18.37 ft / 5.60 m,  18.37 ft / 5.60 m
      - Aft deck:   36.00 %,  10.50 ft / 3.20 m,  10.50 ft / 3.20 m
      - Quarter deck:   15.00 %,  10.50 ft / 3.20 m,  10.50 ft / 3.20 m
      - Average freeboard:      14.67 ft / 4.47 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 175.3 %
      - Above water (accommodation/working, high = better): 138.8 %
   Waterplane Area: 8,579 Square feet or 797 Square metres
   Displacement factor (Displacement / loading): 73 %
   Structure weight / hull surface area: 36 lbs/sq ft or 177 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.38
      - Overall: 0.55
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent

The Rock Doctor

#17
Angermunde Class Torpedo-Boat

At heart it's a stretched Z-class boat, but:

-There is about 10% more range.  This works out to about 5,500 nm @ 15 knots, not counting geared drive efficiency.

-The main battery is DP, which are heavier, fully enclosed mounts compared to previous low-angle 130/45s.

-Eight torpedoes rather than six.

-There's a bit more speed and miscellaneous weight. 

-Stylistically, the funnels are taller and capped to improve the flow of exhaust fumes away from useful bits of the ship.

Angermunde, TB-246, laid down 1931
Aalborg, TB-247, laid down 1931
Abeokuta, TB-248, laid down 1931
Ahtari, TB-249, laid down 1931
Arhus, TB-250, laid down 1931
Akure, TB-251, laid down 1931
Avesta, TB-252, laid down 1931
Alvros, TB-253, laid down 1931
Asele, TB-254, laid down 1932
Alavus, TB-255, laid down 1932
Aanekoski, TB-256, laid down 1932
Amsterdam, TB-257, laid down 1932
Alkmaar, TB-258, laid down 1932
Andrushivka, TB-259, laid down 1932
Aurich, TB-260, laid down 1932
Asamankese, TB-261, laid down 1932

Enter ship name, Enter country Enter ship type laid down 1931

Displacement:
   2,160 t light; 2,288 t standard; 2,603 t normal; 2,856 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (406.35 ft / 393.70 ft) x 37.40 ft x (15.09 / 16.06 ft)
   (123.86 m / 120.00 m) x 11.40 m  x (4.60 / 4.90 m)

Armament:
      4 - 5.12" / 130 mm 45.0 cal guns - 67.62lbs / 30.67kg shells, 400 per gun
     Dual purpose guns in deck and hoist mounts, 1931 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      4 - 1.97" / 50.0 mm 60.0 cal guns - 4.19lbs / 1.90kg shells, 1,500 per gun
     Anti-air guns in deck mounts, 1931 Model
     2 x Twin mounts on sides, forward deck aft
      2 raised mounts
      8 - 0.59" / 15.0 mm 90.0 cal guns - 0.11lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1931 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 288 lbs / 131 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.18" / 30 mm   0.79" / 20 mm      1.18" / 30 mm
   2nd:   0.59" / 15 mm         -               -
   3rd:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 49,262 shp / 36,750 Kw = 33.29 kts
   Range 5,500nm at 15.00 kts
   Bunker at max displacement = 568 tons

Complement:
   181 - 236

Cost:
   £1.244 million / $4.975 million

Distribution of weights at normal displacement:
   Armament: 83 tons, 3.2%
      - Guns: 83 tons, 3.2%
   Armour: 28 tons, 1.1%
      - Armament: 28 tons, 1.1%
   Machinery: 1,300 tons, 50.0%
   Hull, fittings & equipment: 606 tons, 23.3%
   Fuel, ammunition & stores: 444 tons, 17.0%
   Miscellaneous weights: 142 tons, 5.5%
      - Hull below water: 25 tons
      - On freeboard deck: 57 tons
      - Above deck: 60 tons

Fittings:
-9 t:  Fire control (AD)
-25 t:  L/R wireless (AD)
-10 t:  Nightfighting doodads (AD)
-10 t:  Huelsmeyer device (AD)
-32 t:  2x4 21" TT (FD)
-15 t:  ASW munitions (FD)
-10 t:  Sonar (BW)
-15 t:  Enhanced hydrophone package (BW)
-10 t + 6 t:  Weight reserve (FD/AD)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     602 lbs / 273 Kg = 9.0 x 5.1 " / 130 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 13.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.45
   Seaboat quality  (Average = 1.00): 1.00

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.410 / 0.423
   Length to Beam Ratio: 10.53 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 3.94 ft / 1.20 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00%,  23.95 ft / 7.30 m,  19.03 ft / 5.80 m
      - Forward deck:   25.00%,  19.03 ft / 5.80 m,  19.03 ft / 5.80 m
      - Aft deck:   40.00%,  11.15 ft / 3.40 m,  11.15 ft / 3.40 m
      - Quarter deck:   15.00%,  11.15 ft / 3.40 m,  11.15 ft / 3.40 m
      - Average freeboard:      15.09 ft / 4.60 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 174.2%
      - Above water (accommodation/working, high = better): 136.1%
   Waterplane Area: 9,119 Square feet or 847 Square metres
   Displacement factor (Displacement / loading): 77%
   Structure weight / hull surface area: 37 lbs/sq ft or 181 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.38
      - Overall: 0.55
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

640 @ 33
860 @ 30
2700 @ 20
5500@15
13400@10

The Rock Doctor

#18
Caracagrod Class Torpedo-Boat

Exact duplicates of the A-class boats from above, except that they've got 1930-vintage fire control.

Caracagrod, TB-262, laid down 1933
Caciqua, TB-263, laid down 1933
Cayasta, TB-264, laid down 1933
Carnikava, TB-265, laid down 1933
Chemnitz, TB-266, laid down 1933
Chojnice, TB-267, laid down 1933
Chelm, TB-268, laid down 1933
Cottbus, TB-269, laid down 1933
Czestochowa, TB-272, laid down 1934
Cherkazy, TB-273, laid down 1934
Cham, TB-274, laid down 1934
Cesis, TB-275, laid down 1934
Czarnkow, TB-276, laid down 1934
Czluchow, TB-277, laid down 1934
Czersk, TB-278, laid down 1934
Caguas, TB-279, laid down 1934




The Rock Doctor

#19
Drachten Class Torpedo-Boat

The N-class torpedo-boats were built specifically to act as tenders to fleet flagships.  They had additional visual and radio signaling capabilities to allow them to aid in battleline coordination, and basic command facilities in case an admiral needed to get picked up and transferred to another ship without losing control of the larger formation.

Though reasonable for their time, the class is almost fifteen years old.  They are just barely faster than some of the Union's cruisers of the line and their operating range comparatively modest.  A notional replacement is being mooted, on a much larger hull.

The focus remains on supporting (and occasionally being) a fleet flagship, and one supposes the new type could double as an admiralty yacht or emergency VIP transport as well.  The hull is fast, dry, steady, and a good seaboat.  The armament is keyed towards defensive, close-in fire so more, lighter guns compared to general-purpose torpedo-boats like the A-class.  Besides, if she's sailing within spitting distance of a capital ship 95% of the time, odds are the bad guys won't be shooting at this little fellow.

Four N-class ships were built - one each for the Home and Caribbean Fleet's battleship and armored cruiser flagships - and a one-for-one replacement is possible.  I might also add a unit to replace CL Bug as emergency VIP transport.  The N-class could in turn could be re-purposed as destroyer leaders or simply modified to replace their own command facilities with more firepower and a typical torpedo-boat role.

Drachten, TB-270, laid down 1933
Dusseldorf, TB-271, laid down 1934
Dukstas, TB-280, laid down 1934
Douala, TB-281, laid down 1934

Enter ship name, Enter country Enter ship type laid down 1933

Displacement:
    2,494 t light; 2,625 t standard; 2,990 t normal; 3,283 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
    (415.78 ft / 401.90 ft) x 39.37 ft x (15.75 / 16.79 ft)
    (126.73 m / 122.50 m) x 12.00 m  x (4.80 / 5.12 m)

Armament:
      8 - 3.94" / 100 mm 45.0 cal guns - 30.78lbs / 13.96kg shells, 400 per gun
      Dual purpose guns in deck mounts, 1933 Model
      4 x Twin mounts on centreline, evenly spread
        2 raised mounts
      4 - 1.97" / 50.0 mm 60.0 cal guns - 4.19lbs / 1.90kg shells, 1,500 per gun
      Anti-air guns in deck mounts, 1933 Model
      2 x Twin mounts on sides, forward deck aft
      8 - 0.59" / 15.0 mm 90.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
      Machine guns in deck mounts, 1933 Model
      4 x Twin mounts on sides, evenly spread
        4 raised mounts
      Weight of broadside 264 lbs / 120 kg

Armour:
  - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    0.98" / 25 mm    0.59" / 15 mm              -
    3rd:    0.59" / 15 mm          -                  -
    4th:    0.59" / 15 mm          -                  -

Machinery:
    Oil fired boilers, steam turbines,
    Geared drive, 2 shafts, 55,295 shp / 41,250 Kw = 33.52 kts
    Range 6,000nm at 15.00 kts
    Bunker at max displacement = 658 tons

Complement:
    201 - 262

Cost:
    £1.467 million / $5.869 million

Distribution of weights at normal displacement:
    Armament: 44 tons, 1.5 %
      - Guns: 44 tons, 1.5 %
    Armour: 20 tons, 0.7 %
      - Armament: 20 tons, 0.7 %
    Machinery: 1,497 tons, 50.1 %
    Hull, fittings & equipment: 712 tons, 23.8 %
    Fuel, ammunition & stores: 496 tons, 16.6 %
    Miscellaneous weights: 221 tons, 7.4 %
      - Hull below water: 10 tons
      - On freeboard deck: 50 tons
      - Above deck: 161 tons

Fittings:
-10 t:  Sonar (BW)
-20 t:  Extra boat handling facilities (FD)
-16 t:  1x4 530mm heavyweight torpedo carriage, no reloads (FD)
-10 t:  ASW munitions TBD (FD)
-70 t:  Command facilities (AD)
-35 t:  L/R and second S/R wireless (AD)
-25 t:  Extra signaling equipment (larger masts, flag lockers, etc) (AD)
-10 t:  Nightfighting doodads (AD)
-10 t:  Destroyer-scale Huelsmeyer device (AD)
-5 t:  Fire control (AD)

-4 t + 6 t:  Weight reserve (FD/AD)


Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      853 lbs / 387 Kg = 28.0 x 3.9 " / 100 mm shells or 0.4 torpedoes
    Stability (Unstable if below 1.00): 1.22
    Metacentric height 1.8 ft / 0.5 m
    Roll period: 12.4 seconds
    Steadiness    - As gun platform (Average = 50 %): 70 %
            - Recoil effect (Restricted arc if above 1.00): 0.19
    Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
    Hull has rise forward of midbreak,
      a normal bow and a cruiser stern
    Block coefficient (normal/deep): 0.420 / 0.433
    Length to Beam Ratio: 10.21 : 1
    'Natural speed' for length: 20.05 kts
    Power going to wave formation at top speed: 65 %
    Trim (Max stability = 0, Max steadiness = 100): 58
    Bow angle (Positive = bow angles forward): 20.00 degrees
    Stern overhang: 4.92 ft / 1.50 m
    Freeboard (% = length of deck as a percentage of waterline length):
                Fore end,    Aft end
      - Forecastle:    20.00 %,  24.61 ft / 7.50 m,  19.69 ft / 6.00 m
      - Forward deck:    42.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Aft deck:    23.00 %,  11.81 ft / 3.60 m,  11.81 ft / 3.60 m
      - Quarter deck:    15.00 %,  11.81 ft / 3.60 m,  11.81 ft / 3.60 m
      - Average freeboard:        17.09 ft / 5.21 m

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 168.4 %
        - Above water (accommodation/working, high = better): 158.0 %
    Waterplane Area: 9,865 Square feet or 916 Square metres
    Displacement factor (Displacement / loading): 83 %
    Structure weight / hull surface area: 37 lbs/sq ft or 179 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0.50
        - Longitudinal: 1.83
        - Overall: 0.56
    Cramped 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


The Rock Doctor

Ferwar Class Torpedo Boat

A Cadillac of a torpedo-boat, with 50% more firepower than the A/C class, among other things.

Ferwar, TB-282, laid down 1935
Fransta, TB-283, laid down 1935
Frederikshavn, TB-284, laid down 1935
Fjerritslev, TB-285, laid down 1935
Frankfurt, TB-286, laid down 1935
Furstenfeldbruck, TB-287, laid down 1935
Friedberg, TB-288, laid down 1935
Forchhem, TB-289, laid down 1935
Fyadory, TB-290, laid down 1936
Forst, TB-291, laid down 1936
Furstenwale, TB-292, laid down 1936
Frombark, TB-293, laid down 1936
Fanipal, TB-297, laid down 1936
Faaborg, TB-298, laid down 1936
Forshaga, TB-299, laid down 1936
Furudal, TB-300, laid down 1936

Enter ship name, Enter country Enter ship type laid down 1935

Displacement:
   2,497 t light; 2,671 t standard; 3,033 t normal; 3,323 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (439.16 ft / 426.51 ft) x 39.37 ft x (15.42 / 16.40 ft)
   (133.86 m / 130.00 m) x 12.00 m  x (4.70 / 5.00 m)

Armament:
      6 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 400 per gun
     Dual purpose guns in deck and hoist mounts, 1935 Model
     3 x 2-gun mounts on centreline ends, majority forward
      1 raised mount - superfiring
      6 - 1.97" / 50.0 mm 60.0 cal guns - 4.18lbs / 1.89kg shells, 1,500 per gun
     Anti-air guns in deck mounts, 1935 Model
     2 x Twin mounts on sides, forward deck aft
      2 raised mounts
     1 x Twin mount on centreline, aft deck centre
      1 raised mount
      8 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1935 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 432 lbs / 196 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.18" / 30 mm   0.79" / 20 mm      1.18" / 30 mm
   2nd:   0.59" / 15 mm         -               -
   3rd:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 58,981 shp / 44,000 Kw = 34.35 kts
   Range 6,000nm at 15.00 kts
   Bunker at max displacement = 652 tons

Complement:
   203 - 265

Cost:
   £1.734 million / $6.934 million

Distribution of weights at normal displacement:
   Armament: 123 tons, 4.1 %
      - Guns: 123 tons, 4.1 %
   Armour: 26 tons, 0.9 %
      - Armament: 26 tons, 0.9 %
   Machinery: 1,516 tons, 50.0 %
   Hull, fittings & equipment: 687 tons, 22.7 %
   Fuel, ammunition & stores: 536 tons, 17.7 %
   Miscellaneous weights: 144 tons, 4.7 %
      - Hull below water: 25 tons
      - On freeboard deck: 59 tons
      - Above deck: 60 tons

Fittings:
-13 t:  Fire control (AD)
-25 t:  L/R wireless (AD)
-10 t:  Nightfighting doodads (AD)
-10 t:  Huelsmeyer device (AD)
-32 t:  2x4 21" TT (FD)
-15 t:  ASW munitions (FD)
-10 t:  Sonar (BW)
-15 t:  Enhanced hydrophone package (BW)
-12 t + 2 t:  Weight reserve (FD/AD)


Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     654 lbs / 297 Kg = 9.8 x 5.1 " / 130 mm shells or 0.4 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 1.5 ft / 0.5 m
   Roll period: 13.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.51
   Seaboat quality  (Average = 1.00): 0.94

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.410 / 0.422
   Length to Beam Ratio: 10.83 : 1
   'Natural speed' for length: 20.65 kts
   Power going to wave formation at top speed: 63 %
   Trim (Max stability = 0, Max steadiness = 100): 74
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 3.94 ft / 1.20 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  23.95 ft / 7.30 m,  19.03 ft / 5.80 m
      - Forward deck:   25.00 %,  19.03 ft / 5.80 m,  19.03 ft / 5.80 m
      - Aft deck:   40.00 %,  11.15 ft / 3.40 m,  11.15 ft / 3.40 m
      - Quarter deck:   15.00 %,  11.15 ft / 3.40 m,  11.15 ft / 3.40 m
      - Average freeboard:      15.09 ft / 4.60 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 177.4 %
      - Above water (accommodation/working, high = better): 138.4 %
   Waterplane Area: 10,399 Square feet or 966 Square metres
   Displacement factor (Displacement / loading): 78 %
   Structure weight / hull surface area: 39 lbs/sq ft or 193 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.14
      - Overall: 0.54
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

The Rock Doctor

Hogsby Class Torpedo-Boat

Essentially a repeat of the F class.



Hogsby, TB-301, laid down 1937
Helsingborg, TB-302, laid down 1937
Hoyerswerda, TB-303, laid down 1937
Halberstadt, TB-304, laid down 1937
Hallnas, TB-305, laid down 1937
Helsinki, TB-306, laid down 1937
Haarlem, TB-307, laid down 1937
Heidelberg, TB-308, laid down 1937