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Scootia23
Post subject: Aviation Cruiser Saleignes (Fictional Universe)Posted: December 29th, 2015, 1:38 am
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Joined: December 29th, 2015, 1:22 am
Hello everyone here, I've been lurking on this site for quite a while and practicing making my own ship bucket designs, starting with copy pasting elements from existing drawings and slowly adding more and more of own elements as time went on. Most of the ships I draw for are not only fictional but belong to fictional countries in roleplays I'm involved in, since I enjoy the creative freedom it gives me designing a ship. Recently I completed the first drawing of mine which used only pieces from parts sheets or hand drawn on my own, with the exception of the main battery turrets. Credit goes to Gollevainen and his Admiral Hipper class drawings for those. Thus, I present to you the Aviation cruiser Saleignes.

[ img ]

And along with her, a springsharp report for all the specs

Saleignes, Karthic Seaplane Cruiser laid down 1926

Displacement:
5,898 t light; 6,148 t standard; 6,471 t normal; 6,730 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(525.17 ft / 518.00 ft) x 50.00 ft (Bulges 53.00 ft) x (15.00 / 15.50 ft)
(160.07 m / 157.89 m) x 15.24 m (Bulges 16.15 m) x (4.57 / 4.72 m)

Armament:
6 - 6.80" / 173 mm 45.0 cal guns - 158.56lbs / 71.92kg shells, 150 per gun
Breech loading guns in turret on barbette mounts, 1899 Model
3 x Twin mounts on centreline, forward evenly spread
1 raised mount
8 - 3.00" / 76.2 mm 51.0 cal guns - 14.36lbs / 6.51kg shells, 500 per gun
Quick firing guns in deck mounts, 1909 Model
4 x Twin mounts on sides, evenly spread
4 raised mounts
Weight of broadside 1,066 lbs / 484 kg
6 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.445 t each, 8.671 t total
In 2 sets of deck mounted side rotating tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 320.00 ft / 97.54 m 10.00 ft / 3.05 m
Ends: Unarmoured
Main Belt covers 95 % of normal length

- Hull Bulges:
0.00" / 0 mm 0.00 ft / 0.00 m 0.00 ft / 0.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.00" / 76 mm 1.00" / 25 mm 3.00" / 76 mm

- Armoured deck - single deck: 1.00" / 25 mm For and Aft decks

- Conning towers: Forward 3.00" / 76 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 47,254 shp / 35,251 Kw = 29.00 kts
Range 2,500nm at 16.00 kts
Bunker at max displacement = 583 tons

Complement:
359 - 468

Cost:
£1.777 million / $7.106 million

Distribution of weights at normal displacement:
Armament: 244 tons, 3.8 %
- Guns: 236 tons, 3.6 %
- Torpedoes: 9 tons, 0.1 %
Armour: 835 tons, 12.9 %
- Belts: 397 tons, 6.1 %
- Armament: 142 tons, 2.2 %
- Armour Deck: 274 tons, 4.2 %
- Conning Tower: 22 tons, 0.3 %
Machinery: 1,513 tons, 23.4 %
Hull, fittings & equipment: 2,386 tons, 36.9 %
Fuel, ammunition & stores: 573 tons, 8.9 %
Miscellaneous weights: 920 tons, 14.2 %
- Hull below water: 60 tons
- Bulge void weights: 90 tons
- Hull above water: 110 tons
- On freeboard deck: 470 tons
- Above deck: 190 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,354 lbs / 3,789 Kg = 53.1 x 6.8 " / 173 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 2.1 ft / 0.6 m
Roll period: 15.3 seconds
Steadiness - As gun platform (Average = 50 %): 55 %
- Recoil effect (Restricted arc if above 1.00): 0.42
Seaboat quality (Average = 1.00): 1.07

Hull form characteristics:
Hull has a flush deck,
a normal bow and a round stern
Block coefficient (normal/deep): 0.550 / 0.554
Length to Beam Ratio: 9.77 : 1
'Natural speed' for length: 22.76 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 51
Bow angle (Positive = bow angles forward): 9.00 degrees
Stern overhang: 4.00 ft / 1.22 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 20.00 ft / 6.10 m, 18.00 ft / 5.49 m
- Forward deck: 30.00 %, 18.00 ft / 5.49 m, 16.00 ft / 4.88 m
- Aft deck: 35.00 %, 16.00 ft / 4.88 m, 16.00 ft / 4.88 m
- Quarter deck: 15.00 %, 16.00 ft / 4.88 m, 16.00 ft / 4.88 m
- Average freeboard: 16.86 ft / 5.14 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93.4 %
- Above water (accommodation/working, high = better): 153.7 %
Waterplane Area: 18,075 Square feet or 1,679 Square metres
Displacement factor (Displacement / loading): 114 %
Structure weight / hull surface area: 88 lbs/sq ft or 428 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.18
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

It's a bit much to explain her in the context of the roleplay she is in so I'll withhold those details unless someone expresses interest I hearing them, but I'd like to know how you guys would rate this drawing and the ship design in general. Thank you for any feedback.


Last edited by Scootia23 on December 29th, 2015, 2:33 am, edited 1 time in total.

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adenandy
Post subject: Re: Aviation Cruiser Saleignes (Fictional Universe)Posted: December 29th, 2015, 2:29 am
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Joined: July 23rd, 2011, 1:46 am
With respect, the springsharp report appears to have been redacted. May I ask if there's any particular reason why?

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Scootia23
Post subject: Re: Aviation Cruiser Saleignes (Fictional Universe)Posted: December 29th, 2015, 2:33 am
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Joined: December 29th, 2015, 1:22 am
adenandy wrote:
With respect, the springsharp report appears to have been redacted. May I ask if there's any particular reason why?
I put it in spoilers, which in most forums puts it into a collapsible box, but here it just puts black over the text until you click it. I can edit it real quick.


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Krakatoa
Post subject: Re: Aviation Cruiser Saleignes (Fictional Universe)Posted: December 29th, 2015, 5:56 am
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Joined: July 1st, 2014, 12:20 am
Location: New Zealand
Contact: Website
Howdy Scotia23,

Not a bad start, there is a few things that look a bit odd between the drawing and the Springsharp report.
You have a 1926 ship with 1899 model guns. Normally the guns are made to match the ship.
The 6.8" guns are a bit small for the size of the German 8" twin turrets which always looked huge for their 8" guns let alone anything smaller. Check out Gollys 7" turrets for the Kirov class cruisers.
The speed and armour ratings look good for the size of the ship, though I am not sure on the length to beam ratio which is normally done for high speed, which your ship can not claim at 29 knots.


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Scootia23
Post subject: Re: Aviation Cruiser Saleignes (Fictional Universe)Posted: December 29th, 2015, 3:36 pm
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Joined: December 29th, 2015, 1:22 am
Krakatoa wrote:
Howdy Scotia23,

Not a bad start, there is a few things that look a bit odd between the drawing and the Springsharp report.
You have a 1926 ship with 1899 model guns. Normally the guns are made to match the ship.
The 6.8" guns are a bit small for the size of the German 8" twin turrets which always looked huge for their 8" guns let alone anything smaller. Check out Gollys 7" turrets for the Kirov class cruisers.
The speed and armour ratings look good for the size of the ship, though I am not sure on the length to beam ratio which is normally done for high speed, which your ship can not claim at 29 knots.
The year model of the guns was intentional, since the guns were taken off a pre-dreadnought then being decommissioned and rebuilt them inside modern turrets. IRL the Agano class used secondaries from Fuso and Kongo class ships in much the same way. In the context of the RP, the pre dreadnought belonged to a naval superpower which was supporting the smaller navy utilizing this cruiser, and the use of recycled guns was a cost saving measure for both parties.

I checked out the Kirov 7 inch turrets as you said, at 57x19 pixels they're only a tad larger than my 6.8s which are 54x17. I should have noted that I did modify the Hipper turrets to be smaller to be more appropriate for the 6.8s.

As for the length to beam ratio, it was the best I could develop that fit the allotted 6500 tons I gave myself when designing this ship, whilst maintaining good seakeeping and steadiness factors. I would have liked a higher speed but the handling and the hull strength rapidly plummet at anything above 29 knots, and I didn't want to compromise the firepower or protection.


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