New Gran Colombian Ships for 1912

[Borys]

Ahoj!
Maybe you're right, and it's just a trick of the eye ...


Borys

[P3D]

HLL compared to LHL also decreases hull stresses (weight closer to amidships), but SS2 won't show that.

[The Rock Doctor]

Monty!  Is that really your first post here?

I hadn't considered a reverse-Mogami layout, but it's pretty as well.  I was mainly going between the aft chunk of Agincourt and the look of New York.  I guess my thinking with the layout I did go was (maybe) improved firing arcs forward of amidships, while keeping the turret aft. 

The citadel is the same length either way, but if you compare where the barbette from "C" turret is located, my chosen layout leaves more room for machinery amidships than the HLL layout.

[Jefgte]

Welcome aboard Monty   ;)

About the BB design...hmmm...

Internal disposition is not very good.
The place of the boilers is too great & the place for the turbines too short.
Remove the 3rd stack & instal ventilators for turbines with life boats in this place.

Turrets disposition is very good.


Jef  ;)

[BC Renown]

I guess moving the #3 barbette 25' (assuming the scale is 1 pixel = 1 foot) further forward would cut into the machinery spaces somewhat. And, a capital ship only 593' long could ill-afford to lose any such space. I stand corrected guys and thanks a heap for the warm welcome.  :-* :)

[The Rock Doctor]

That's the scale alright.

You're welcome, and enjoy the site...just maybe go easy on the kisses...

[The Rock Doctor]

The protected cruiser Puerta Espana was Gran Colombia's first to use turbines, and the result was...not spectacular.  By modern standards, in fact, she's quite the plodding thing.  Now that there are a number of newer, better, faster cruisers in service, the time is right to make some improvements to PE, specifically:

Main battery

Cost:  0.101 BP, $0.20

The 140mms are just replaced, but the four 47mm are replaced with two purpose-built 65mm AA guns.  Triple torpedo carriages replace the doubles.

Since the weapons are not that old, and in decent shape, it's expected that they will be re-used in a shore battery somewhere in 1913.

Machinery

Cost:  0.955 BP, $1.91

The new machinery allows a top speed of almost 26 knots, while being small enough (lighter than the original 1905 machinery) to fit into the existing space without requiring movement of bulkheads.

The old machinery (2 x 7,000 HP and 1 x 8,000 HP) is to be re-used in some fashion where the age isn't too important - probably auxiliaries of some kind.

New miscellaneous weight

Cost:  0.150 BP, $0.15

This is, more specifically, the stuff using the miscellaneous weight:  25 t for wireless, 25 t for flag facilities, 60 t for mines, 6 t for torpedoes, and 34 t for a weight reserve.

There are no plans to re-use the twin torpedo carriages.  I'm not that tight-fisted.

General refit

Cost:  $0.61

She's there in the yard anyway, so what the heck.

Total Cost

1.206 BP and $2.41. 

The new sim follows.  The old sim can be found in the Protected Cruisers thread in the GC Armada forum.

[The Rock Doctor]

Puerta Espana, laid down 1905 (Engine 1912)

Displacement:
   3,185 t light; 3,322 t standard; 3,738 t normal; 4,071 t full load

Dimensions: Length overall / water x beam x draught
   425.92 ft / 423.88 ft x 44.29 ft x 15.49 ft (normal load)
   129.82 m / 129.20 m x 13.50 m  x 4.72 m

Armament:
      4 - 5.51" / 140 mm guns in single mounts, 83.72lbs / 37.97kg shells, 1905 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, evenly spread, 1 raised mount
      2 - 5.51" / 140 mm guns in single mounts, 83.72lbs / 37.97kg shells, 1905 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships
      2 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1905 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1905 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 519 lbs / 235 kg
   Shells per gun, main battery: 200
   6 - 18.0" / 457 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.36" / 60 mm   282.15 ft / 86.00 m   7.97 ft / 2.43 m
   Ends:   1.18" / 30 mm   141.70 ft / 43.19 m   7.97 ft / 2.43 m
     Main Belt covers 102 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.18" / 30 mm   1.18" / 30 mm      1.18" / 30 mm
   2nd:   1.18" / 30 mm   1.18" / 30 mm      1.18" / 30 mm
   3rd:   1.18" / 30 mm         -               -
   4th:   0.47" / 12 mm         -               -

   - Armour deck: 1.18" / 30 mm, Conning tower: 2.36" / 60 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 22,000 shp / 16,412 Kw = 25.87 kts
   Range 7,000nm at 10.00 kts (Bunkerage = 749 tons)

Complement:
   238 - 310

Cost:
   £0.300 million / $1.199 million

Distribution of weights at normal displacement:
   Armament: 65 tons, 1.7 %
   Armour: 580 tons, 15.5 %
      - Belts: 270 tons, 7.2 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 36 tons, 1.0 %
      - Armour Deck: 262 tons, 7.0 %
      - Conning Tower: 12 tons, 0.3 %
   Machinery: 955 tons, 25.6 %
   Hull, fittings & equipment: 1,435 tons, 38.4 %
   Fuel, ammunition & stores: 553 tons, 14.8 %
   Miscellaneous weights: 150 tons, 4.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4,518 lbs / 2,049 Kg = 54.0 x 5.5 " / 140 mm shells or 1.0 torpedoes
   Stability (Unstable if below 1.00): 1.20
   Metacentric height 2.1 ft / 0.6 m
   Roll period: 12.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.33
   Seaboat quality  (Average = 1.00): 1.33

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.450
   Length to Beam Ratio: 9.57 : 1
   'Natural speed' for length: 20.59 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 53
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      23.29 ft / 7.10 m
      - Forecastle (20 %):   19.36 ft / 5.90 m
      - Mid (40 %):      19.36 ft / 5.90 m (11.48 ft / 3.50 m aft of break)
      - Quarterdeck (15 %):   11.48 ft / 3.50 m
      - Stern:      11.48 ft / 3.50 m
      - Average freeboard:   14.95 ft / 4.56 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.5 %
      - Above water (accommodation/working, high = better): 111.7 %
   Waterplane Area: 11,976 Square feet or 1,113 Square metres
   Displacement factor (Displacement / loading): 118 %
   Structure weight / hull surface area: 72 lbs/sq ft or 353 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.55
      - Overall: 1.01
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Sachmle]

Nice modernization, but you left yourself a little hull strength.

- Overall: 1.01

[P3D]

Not worth it. Decrease coal capacity and use the ship for minelaying.

[The Rock Doctor]

If I wanted a slow minelayer, I'd use the surviving VTE protected cruisers for the purpose.

I recognize there's a little extra hull strength left - I think the issue was that adding much more of anything would result in one of those "Magazine/Machinery spaces not fully armored" kinda warnings.  At any rate, the ship does what she's supposed to, as designed.