From CC Valandil to AC Manco Capac

[Jefgte]

Here is the Combat Cruiser Valandil from Rohan.
This cruiser was built in 1906-1909 & sold to Gran Colombia at the beginning of 1917
Gran Colombia didn't use this kind of cruiser & proposal to made a transfer to Peru.
The cruiser "ll be transfered mid 1917.The Armada Design Bureau is studying the cruiser to adapt to standard Peruvian Armada characts.



Valandil, Rohan CC laid down 1906 (Engine 1909)

Displacement:
   13 170 t light; 13 915 t standard; 15 488 t normal; 16 747 t full load

Dimensions: Length overall / water x beam x draught
   520.00 ft / 520.00 ft x 73.00 ft x 24.00 ft (normal load)
   158.50 m / 158.50 m x 22.25 m  x 7.32 m

Armament:
     8 - 9.02" / 229 mm guns (4x2 guns), 364.50lbs / 165.33kg shells, 1906 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread, 2 raised mounts
     Aft Main mounts separated by engine room
     4 - 9.02" / 229 mm guns in single mounts, 364.50lbs / 165.33kg shells, 1906 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     12 - 4.49" / 114 mm guns in single mounts, 45.56lbs / 20.67kg shells, 1906 Model
     Quick firing guns in casemate mounts
     on side, evenly spread
     6 - 1.50" / 38.1 mm guns in single mounts, 1.69lbs / 0.77kg shells, 1906 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
     6 - 0.75" / 19.1 mm guns in single mounts, 0.21lbs / 0.10kg shells, 1906 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 4 932 lbs / 2 237 kg
   Shells per gun, main battery: 150

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.00" / 229 mm   340.00 ft / 103.63 m   11.00 ft / 3.35 m
   Ends:   3.00" / 76 mm   180.00 ft / 54.86 m   11.00 ft / 3.35 m
   Upper:   5.00" / 127 mm   340.00 ft / 103.63 m   10.00 ft / 3.05 m
     Main Belt covers 101 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.00" / 229 mm   5.00" / 127 mm      9.00" / 229 mm
   2nd:   5.00" / 127 mm         -               -
   3rd:   5.00" / 127 mm         -               -
   4th:   0.50" / 13 mm         -               -

  - Armour deck: 2.00" / 51 mm, Conning tower: 9.00" / 229 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 46 000 shp / 34 316 Kw = 24.85 kts
   Range 7 500nm at 12.00 kts
   Bunker at max displacement = 2 832 tons (58% coal)

Complement:
   693 - 902

Cost:
   £1.290 million / $5.159 million

Distribution of weights at normal displacement:
   Armament: 619 tons, 4.0 %
   Armour: 4 884 tons, 31.5 %
      - Belts: 2 408 tons, 15.5 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 333 tons, 8.6 %
      - Armour Deck: 1 022 tons, 6.6 %
      - Conning Tower: 120 tons, 0.8 %
   Machinery: 2 207 tons, 14.3 %
   Hull, fittings & equipment: 5 360 tons, 34.6 %
   Fuel, ammunition & stores: 2 318 tons, 15.0 %
   Miscellaneous weights: 100 tons, 0.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20 464 lbs / 9 282 Kg = 55.8 x 9.0 " / 229 mm shells or 2.5 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 3.5 ft / 1.1 m
   Roll period: 16.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.68
   Seaboat quality  (Average = 1.00): 1.26

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.595
   Length to Beam Ratio: 7.12 : 1
   'Natural speed' for length: 22.80 kts
   Power going to wave formation at top speed: 54 %
   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 (% = measuring location as a percentage of overall length):
      - Stem:      26.00 ft / 7.92 m
      - Forecastle (20 %):   22.00 ft / 6.71 m
      - Mid (50 %):      20.00 ft / 6.10 m
      - Quarterdeck (15 %):   18.00 ft / 5.49 m
      - Stern:      18.00 ft / 5.49 m
      - Average freeboard:   20.37 ft / 6.21 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 78.5 %
      - Above water (accommodation/working, high = better): 151.3 %
   Waterplane Area: 27 634 Square feet or 2 567 Square metres
   Displacement factor (Displacement / loading): 108 %
   Structure weight / hull surface area: 130 lbs/sq ft or 633 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.73
      - 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
   Good seaboat, rides out heavy weather easily
---------------------
I draw the cruiser with Rohan building look but Tan could ask for modifs.


Jef  ;)

[Tanthalas]

Looks good to me Jef, I wish I could do as well on overheads as you do...

[The Rock Doctor]

Nice.  Any chance that you could do a version with the cage mast that I think Ithekro would have designed her with?

[Jefgte]

...Any chance that you could do a version with the cage mast that I think Ithekro would have designed her with?

I could redraw with a cage mast.

1 or 2 cage mast?


Jef

[Jefgte]

With fore cage mast



& the original SS from Ithekro

http://www.navalism.org/index.php?topic=48.0


Jef  ;)

[mentat]

nice solid ship - you plan to upgrade engines? - seems to be only the speed that is really out of date

very well protected but suffers for it - stability is a bit low

[Jefgte]

nice solid ship - you plan to upgrade engines? - seems to be only the speed that is really out of date...

no plan for update engines.
- The speed is correct to work near the BBs.
- I have seen probably a little bullet.

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 46 000 shp / 34 316 Kw = 24.85 kts
   Range 7 500nm at 12.00 kts
   Bunker at max displacement = 2 832 tons (58% coal)

2 shafts for 46000SHP in 1909...  I probably correct & change to 4 shafts

... very well protected but suffers for it - stability is a bit low

What is the best choice to increase stability ?

- Remove 4 x229 casemates guns
- Add bulges, reduce speed
...

Jef  ;)

[Jefgte]

...With cage mast fore & aft...




Jef  ;)

[Walter]

What is the best choice to increase stability ?

- Remove 4 x229 casemates guns
- Add bulges, reduce speed
...

Reducing speed actually decreases stability since you have less engine weight in the lower parts of the ship (something that will also happen if you are going to throw new engines in there). So it should read: "- Add bulges, increase speed and keep an eye on the seaboat rating" :)

[Tanthalas]

What is the best choice to increase stability ?

- Remove 4 x229 casemates guns
- Add bulges, reduce speed
...

Reducing speed actually decreases stability since you have less engine weight in the lower parts of the ship (something that will also happen if you are going to throw new engines in there). So it should read: "- Add bulges, increase speed and keep an eye on the seaboat rating" :)

and get rid of the gagworthy cage masts...

[Walter]

Yes. tear them down and send them back to Rohan so they can use them as giant Braziers to light their coastline. :D

[The Rock Doctor]

I like those cage masts.  Keep 'em!

[TexanCowboy]

Yes, until a hurricane strikes your Atlantic strike force. Then, your fire control masts go down, and I attack in the chaos.  ;D

[The Rock Doctor]

Yes, it's my Achilles' Heel.

[Sachmle]

Yes, it's my Achilles' Heel.

Rocky, you forgot your [sarcasm][/sarcasm] HTML brackets. Shame on you ;)