New Gran Colombian Ships for 1913

[Jefgte]

25, 26, 27kts...

If you want to catch the Blue Ribbon (?)

I note also that you have much lifeboats...
GC ingeniors retain the 14 april 1912 lesson...  :'(



Jef 

[The Rock Doctor]

The powerplant is at the maximum size allowed for the current engine tech, so I can't do anything to match the speed of those big French liners.  Anyway, the emphasis is more on ensuring an effective link between Gran Colombia and Iberia than on winning prizes.

As for the lifeboats, it might just be hindsight, but it just seems...dumb...not to have enough for all aboard.

[The Rock Doctor]

With oil-sprayed coal, and a range of 8,000 nm @ 20 kts, the top speed comes out to 23 knots.  No other change to the specifics of note.

If I switch the fuel back to oil, but keep the range and speed, I can tack another 2,000 t of miscellaneous weight onboard.

[P3D]

The speed of the French liners were decreased by Maddox to conform N3 rules.

[maddox]

IC, and normaly know to all seafarers.

Le Magnificent could ,and can reach 27 kts, but won't do it because that causes excessive damage to the engines due vibrations, and the black gang would go on strike.   

On a very good day, she'll run barely 24 kts, on bad days it's 20 and a slow 20 at that.

OOC, in theory she's grandfathered, like most ships that came over from the nverse II.
on the other hand, it wouldn't be fair, so I put this background story in.
Now it comes up, I'll add it to her SS file found here
http://www.navalism.org/index.php?topic=1040.msg11226#msg11226

[Korpen]

Exellent designs as always, hard to say much. :)
Glad to see i am not the only one to stuff in seven centerline guns on cruisers.  8)

[The Rock Doctor]

Well, gushing praise is always accepted.

Borys never got back to me after I posted the cruiser pic, but it looked reasonable to me...

[The Rock Doctor]

The S-Class torpedo-boats are improvements to the Q/R class boats built in late 1912 and earlier in the present year.

The hull is longer, and the stern more rounded, making it easier to roll ordnance off the end of the ship.  This is no small concern since the class is fitted not only with depth charges but also a modest mine-laying capability.

The increased length also allows for increased bunkerage, while retaining the same speed on the same powerplant. 

Above-decks, an increase in deck space and a deletion of the hoists used in for the previous class' main battery (belatedly deemed unnecessary for the size of gun) allows a fourth gun to be fitted, in the place of the anti-airship gun.  This, in turn, has been relocated to a position between the second and third funnels, on an elevated platform. 

Other features include simplification of the midships deck break, elevation of the first pair of boats to the forecastle, and movement of the second pair of boats slightly inboard - the latter two measures being taken to protect the boats from waves.  Fire control and a short-range wireless are built into the ship.

Barring abrupt changes to shipbuilding philosophy, it is expected that this will be a standard model for GC TB construction until the next generation of turbines is available.

(Yes, the sim says laid down 1909.  It changes nothing; ignore it)



Enter ship name, Enter country Enter ship type laid down 1909 (Engine 1912)

Displacement:
   1,000 t light; 1,039 t standard; 1,218 t normal; 1,362 t full load

Dimensions: Length overall / water x beam x draught
   341.03 ft / 336.29 ft x 31.17 ft x 10.17 ft (normal load)
   103.95 m / 102.50 m x 9.50 m  x 3.10 m

Armament:
      4 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1909 Model
     Breech loading guns in deck mounts
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      1 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1909 Model
     Breech loading anti-airship gun in deck mount
     on centreline amidships, 1 raised gun
      2 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1909 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 130 lbs / 59 kg
   Shells per gun, main battery: 200
   6 - 21.0" / 533 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm         -               -
   2nd:   0.98" / 25 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 24,000 shp / 17,904 Kw = 30.93 kts
   Range 8,000nm at 10.00 kts (Bunkerage = 323 tons)

Complement:
   103 - 134

Cost:
   £0.137 million / $0.549 million

Distribution of weights at normal displacement:
   Armament: 16 tons, 1.3 %
   Armour: 10 tons, 0.8 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 10 tons, 0.8 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 633 tons, 51.9 %
   Hull, fittings & equipment: 289 tons, 23.7 %
   Fuel, ammunition & stores: 219 tons, 18.0 %
   Miscellaneous weights: 52 tons, 4.3 %
-25 t:  Fire Control
-6 t:  Torpedoes
-4 t:   12 Depth Charges on dual rails aft
-16 t:  16 Mines
-1 t:  Weight Reserve

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     284 lbs / 129 Kg = 9.3 x 3.9 " / 100 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.35
   Metacentric height 1.5 ft / 0.4 m
   Roll period: 10.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.13
   Seaboat quality  (Average = 1.00): 0.91

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.400
   Length to Beam Ratio: 10.79 : 1
   'Natural speed' for length: 18.34 kts
   Power going to wave formation at top speed: 63 %
   Trim (Max stability = 0, Max steadiness = 100): 77
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      17.72 ft / 5.40 m
      - Forecastle (20 %):   15.75 ft / 4.80 m
      - Mid (40 %):      15.75 ft / 4.80 m (7.87 ft / 2.40 m aft of break)
      - Quarterdeck (15 %):   7.87 ft / 2.40 m
      - Stern:      7.87 ft / 2.40 m
      - Average freeboard:   11.18 ft / 3.41 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 182.8 %
      - Above water (accommodation/working, high = better): 74.5 %
   Waterplane Area: 6,452 Square feet or 599 Square metres
   Displacement factor (Displacement / loading): 58 %
   Structure weight / hull surface area: 26 lbs/sq ft or 129 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 0.87
      - Overall: 0.52
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

[The Rock Doctor]

The Tucupita class torpedoboats were the last such ships to be built with reciprocating engines rather than turbines.  Now on the verge of obsolesence, it's been decided to undertake a very modest refit to extend their lives and make them capable of retaining a basic harbour defence function.

Apart from the basic refit, the changes are limited to replacement of the armament:  the eight (!) guns of three different calibers are replaced by a single 76.2 mm and two newer-model 47mm QF guns.  The two single 457mm torpedo tubes are replaced by a new triple 533mm carriage.  Aft, the weight/space savings resulting from the downsized armament is used to install two racks of six depth charges.

The class was refitted in the first half of 1913, and is expected to be in service for several years to come.

Top view is as completed; bottom view is as refitted.  Sim is as refitted.

(Note that the class was original design for N2 in Springstyle, hence the odd choice of engine power)



Tucupita, laid down 1902, refitted 1913

Displacement:
   592 t light; 609 t standard; 692 t normal; 759 t full load

Dimensions: Length overall / water x beam x draught
   229.66 ft / 229.66 ft x 22.97 ft x 11.48 ft (normal load)
   70.00 m / 70.00 m x 7.00 m  x 3.50 m

Armament:
      1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1902 Model
     Breech loading gun in deck mounts
     on centreline ends, evenly spread
      2 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1902 Model
     Quick firing guns in deck mounts
     on side, all amidships
      2 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1902 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 20 lbs / 9 kg
   Shells per gun, main battery: 200
   3 - 21.0" / 533 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm         -               -
   3rd:   0.08" / 2 mm         -               -

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 10,709 ihp / 7,989 Kw = 26.35 kts
   Range 3,000nm at 10.00 kts (Bunkerage = 150 tons)
     Caution: Delicate, lightweight machinery

Complement:
   66 - 87

Cost:
   £0.082 million / $0.329 million

Distribution of weights at normal displacement:
   Armament: 2 tons, 0.4 %
   Armour: 2 tons, 0.3 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 2 tons, 0.3 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 425 tons, 61.4 %
   Hull, fittings & equipment: 155 tons, 22.4 %
   Fuel, ammunition & stores: 100 tons, 14.4 %
   Miscellaneous weights: 8 tons, 1.2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     135 lbs / 61 Kg = 10.0 x 3.0 " / 76 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.36
   Metacentric height 0.9 ft / 0.3 m
   Roll period: 9.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.05
   Seaboat quality  (Average = 1.00): 1.08

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.400
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 15.15 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 65
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      9.84 ft / 3.00 m
      - Forecastle (20 %):   9.84 ft / 3.00 m
      - Mid (50 %):      9.84 ft / 3.00 m
      - Quarterdeck (15 %):   9.84 ft / 3.00 m
      - Stern:      9.84 ft / 3.00 m
      - Average freeboard:   9.84 ft / 3.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 202.3 %
      - Above water (accommodation/working, high = better): 56.1 %
   Waterplane Area: 3,247 Square feet or 302 Square metres
   Displacement factor (Displacement / loading): 21 %
   Structure weight / hull surface area: 22 lbs/sq ft or 108 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.51
      - Longitudinal: 2.10
      - Overall: 0.59
   Hull space for machinery, storage, compartmentation is extremely poor
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform