A Modern Clipper

[khymerion]

Expensive, little cargo capacity, but incredible speed.  This is what the designers from a small firm in Hamburg said when they proposed this class for the purpose of being a new priority transport of small but highly valuable items.  With the increasing speed of possible privateer and pirate vessels, and the new drydock and slip being built currently in Hamburg, the designers felt this was a possibility now.  The heads of both the military and the private shipping companies are withholding judgement though. 

The Armorment was just there to stave off any pirates that did manged to get close due to one means or another.

BCS Front, Baltic Confederation Priority Courier laid down 1907 (Engine 1909)

Displacement:
   8,909 t light; 9,213 t standard; 14,811 t normal; 19,290 t full load

Dimensions: Length overall / water x beam x draught
   735.92 ft / 720.00 ft x 36.00 ft x 20.00 ft (normal load)
   224.31 m / 219.46 m x 10.97 m  x 6.10 m

Armament:
      4 - 4.10" / 104 mm guns in single mounts, 34.46lbs / 15.63kg shells, 1907 Model
     Quick firing guns in deck mounts
     on side ends, evenly spread
      8 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1907 Model
     Machine guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
   Weight of broadside 138 lbs / 63 kg
   Shells per gun, main battery: 100

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 47,711 shp / 35,592 Kw = 26.00 kts
   Range 14,000nm at 15.50 kts
   Bunker at max displacement = 10,076 tons (80% coal)

Complement:
   670 - 872

Cost:
   £0.654 million / $2.615 million

Distribution of weights at normal displacement:
   Armament: 17 tons, 0.1 %
   Machinery: 2,339 tons, 15.8 %
   Hull, fittings & equipment: 3,613 tons, 24.4 %
   Fuel, ammunition & stores: 5,902 tons, 39.8 %
   Miscellaneous weights: 2,940 tons, 19.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20,074 lbs / 9,105 Kg = 582.5 x 4.1 " / 104 mm shells or 1.9 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 13.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.08
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 1.000
   Length to Beam Ratio: 20.00 : 1
   'Natural speed' for length: 26.83 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 5.00 ft / 1.52 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      30.00 ft / 9.14 m
      - Forecastle (40 %):   19.00 ft / 5.79 m
      - Mid (50 %):      19.00 ft / 5.79 m
      - Quarterdeck (20 %):   19.00 ft / 5.79 m
      - Stern:      19.00 ft / 5.79 m
      - Average freeboard:   20.76 ft / 6.33 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.5 %
      - Above water (accommodation/working, high = better): 143.0 %
   Waterplane Area: 26,482 Square feet or 2,460 Square metres
   Displacement factor (Displacement / loading): 191 %
   Structure weight / hull surface area: 63 lbs/sq ft or 307 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.25
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Borys]

Ahoj!
I'd give her a 6 incher in an aft position. As a means of persuasion over those chasing her.

I'm suprised at the block coeficient - does she look like a modern day tanker or river barge?


Borys

[khymerion]

That is the point actually.  So when she slows down and is viewed from the side, she will look like a standard freighter from a distance...

[Borys]

Ahoj!
Only now did I look a the L:B ratio - GULP!
Borys

[khymerion]

With the 6" chase armorment...

BCS Front, Baltic Confederation Priority Courier laid down 1907 (Engine 1909)

Displacement:
   8,906 t light; 9,213 t standard; 14,811 t normal; 19,290 t full load

Dimensions: Length overall / water x beam x draught
   735.92 ft / 720.00 ft x 36.00 ft x 20.00 ft (normal load)
   224.31 m / 219.46 m x 10.97 m  x 6.10 m

Armament:
      2 - 4.10" / 104 mm guns in single mounts, 34.46lbs / 15.63kg shells, 1907 Model
     Quick firing guns in deck mounts
     on centreline, all forward, 1 raised mount
      8 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1907 Model
     Machine guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
      1 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1907 Model
     Quick firing gun in deck mount
     on centreline aft
   Weight of broadside 177 lbs / 80 kg
   Shells per gun, main battery: 100

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 47,711 shp / 35,592 Kw = 26.00 kts
   Range 14,000nm at 15.50 kts
   Bunker at max displacement = 10,076 tons (80% coal)

Complement:
   670 - 872

Cost:
   £0.658 million / $2.631 million

Distribution of weights at normal displacement:
   Armament: 22 tons, 0.1 %
   Machinery: 2,339 tons, 15.8 %
   Hull, fittings & equipment: 3,615 tons, 24.4 %
   Fuel, ammunition & stores: 5,905 tons, 39.9 %
   Miscellaneous weights: 2,930 tons, 19.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20,014 lbs / 9,078 Kg = 580.8 x 4.1 " / 104 mm shells or 1.9 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 13.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.11
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 1.000
   Length to Beam Ratio: 20.00 : 1
   'Natural speed' for length: 26.83 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 5.00 ft / 1.52 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      30.00 ft / 9.14 m
      - Forecastle (40 %):   19.00 ft / 5.79 m
      - Mid (50 %):      19.00 ft / 5.79 m
      - Quarterdeck (20 %):   19.00 ft / 5.79 m
      - Stern:      19.00 ft / 5.79 m
      - Average freeboard:   20.76 ft / 6.33 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.7 %
      - Above water (accommodation/working, high = better): 143.0 %
   Waterplane Area: 26,482 Square feet or 2,460 Square metres
   Displacement factor (Displacement / loading): 190 %
   Structure weight / hull surface area: 63 lbs/sq ft or 307 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.25
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[swamphen]

I'd say use a 0.7 BC, but I really like the concept. (Would probably be designated as an Aviso.)

[khymerion]

The problem I was running into and thus the massive BC was trying to cram all the stuff into a hull with a sufficient cargo capacity, speed, and still being able to use the current turbine technology that will be available soon and the new slip available to allow for her to be built.   Thus, alot of limitations that I can't seem to fight much more against.

[Korpen]

The problem I was running into and thus the massive BC was trying to cram all the stuff into a hull with a sufficient cargo capacity, speed, and still being able to use the current turbine technology that will be available soon and the new slip available to allow for her to be built.   Thus, alot of limitations that I can't seem to fight much more against.

A ship with 20:1 L:B...
that ship will be in real risk of breaking in half in any sort of weather.
Or if fully loaded...

[khymerion]

Hmmmm... back to the drawing board then...

[Ithekro]

Basic max is suppose to be 10:1, maybe 12:1 for a destroyer, but that is pushing it a bit (I think 12:1 was for the French super destroyers...the 40 knot jobs)

[maddox]

Most ,if not all Clippers had a very fine hull form, and strangely enough, a transom stern.

But there is no reason a very narrow ship should break, if the keel is strong enough.

I don't see the rowboats used in modern competitions break, and if you want narrow, those are.

[khymerion]

I appologize for calling the original pair of ideas clippers... I should have called them oversized tramp freighters.  The romantic nature of racing through the waves as insane speeds carrying small but valuable cargo and now that I know now that I can't go over the 10:1 ratio... I am just going to have to dream on a different scale.  Thus, my much smaller and less cargo carrying courier ship.  Now with 100% less bulk and much sleeker lines.  Now with just a measily 500 tons of cargo and a good radio.  Have to be able to keep a trained man to listen into merchant chatter when bored.

BCS Gust, Baltic Confederation Priority Courier laid down 1907 (Engine 1909)

Displacement:
   2,602 t light; 2,673 t standard; 3,550 t normal; 4,252 t full load

Dimensions: Length overall / water x beam x draught
   382.60 ft / 375.00 ft x 37.50 ft x 21.00 ft (normal load)
   116.62 m / 114.30 m x 11.43 m  x 6.40 m

Armament:
      1 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1907 Model
     Quick firing gun in deck mount
     on centreline aft
      8 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1907 Model
     Machine guns in deck mounts
     on side, all amidships
   Weight of broadside 109 lbs / 49 kg
   Shells per gun, main battery: 0

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 21,047 shp / 15,701 Kw = 25.50 kts
   Range 9,250nm at 12.00 kts
   Bunker at max displacement = 1,579 tons (80% coal)

Complement:
   229 - 298

Cost:
   £0.247 million / $0.988 million

Distribution of weights at normal displacement:
   Armament: 14 tons, 0.4 %
   Machinery: 1,032 tons, 29.1 %
   Hull, fittings & equipment: 1,031 tons, 29.1 %
   Fuel, ammunition & stores: 948 tons, 26.7 %
   Miscellaneous weights: 525 tons, 14.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,839 lbs / 1,288 Kg = 26.3 x 6.0 " / 152 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 13.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.06
   Seaboat quality  (Average = 1.00): 1.49

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.421
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 19.36 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 47
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      20.87 ft / 6.36 m
      - Forecastle (20 %):   13.28 ft / 4.05 m
      - Mid (50 %):      13.28 ft / 4.05 m
      - Quarterdeck (15 %):   13.28 ft / 4.05 m
      - Stern:      13.28 ft / 4.05 m
      - Average freeboard:   13.89 ft / 4.23 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 113.2 %
      - Above water (accommodation/working, high = better): 96.9 %
   Waterplane Area: 8,772 Square feet or 815 Square metres
   Displacement factor (Displacement / loading): 132 %
   Structure weight / hull surface area: 58 lbs/sq ft or 284 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.33
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[maddox]

Clippers weren't that big on cargo.  1000 tons was a big one already. 
The big sailing ships, windjammers (thats Dutch) went up to 10 000 tons.  With 7 masts at max.

[Borys]

I'd accept 1:15 for crazy :) ships.
Not much of  merchant chatter in 1907 ...
Borys

[maddox]

Clippers aren't common in 1907.  They will attract attention.