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Tzoli

The North Carolina Preliminaries

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Alpha Tester
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357 battles
A friend of mine asked me some time ago to draw these pre-designs the first variants of Battleship studies leading to the North Carolina class Battleships.
You can see here are Schemes A,B,C,D,F and H.
 
Scheme A:
north_carolina_preliminary_scheme_a_1934_35_by_tzoli-dc11pzy.png
This is the first on the list leading to that class featuring a modified Nelson style all forward armament but with all superfiring turrets where all turrets could fire forward at a minimum angle of 4,5-5 degrees with a calibre of 14"/50 Mark B / Mark 13 Cannons. Secondary armament are considered the standard 5"/38 Mark 12 but in triple turrets, engine room arrangement also out of ordinary as all the boiler rooms located at the aft behind the turbine rooms, and on the extreme aft two seaplane catapult on a superfiring arrangement. The bridge is reminiscent of the British Nelsons.
 
The design had the following characteristics:
Dimensions: 216,41 wl x 31,09 x 8,7m
Displacement: 32.450tons (standard), 35.615 (maximum)
Armour: 114mm Deck, 292mm Belt
Engines: 160.000shp 4 shafts
Speed: 56km/h (30knots)
Armaments: 
3x3 14"/50 (351mm) Cannons
4x3 5"/38 (127mm) DP-AA Guns
4x4 1,1"/75 (28mm)
2-4x Seaplanes (I've choose Vought O5U)
 
 
Scheme B:
north_carolina_preliminary_scheme_b_1934_35_by_tzoli-dc4qsfo.png
This Scheme shows a more conservative approach regarding the arrangement of the main turrets with superfiring pairs of tripel turrets forward and aft but still using the triple 5" turrets as DP-AA guns. Both deck and belt armour increased and together with the addition of a 4th turret meant a considerable increase in displacement and thus the design became very "tight" for the proposed 35.600ton limit of the 2nd London Naval Treaty. Engine arrangement was similar to Scheme A grouping the boilers aft of the turbines. The primary and secondary superstructure design remand unchanged. Aircraft facilities were also the more accepted conservative arrangement on the aft sides or fantail.
 
The design had the following characteristics:
Dimensions: 216,41 wl x 32 x 9,95m
Displacement: 36.800tons (standard), 39.730 (maximum)
Armour: 133mm Deck, 337mm Belt
Engines: 180.000shp 4 shafts
Speed: 56km/h (30,5knots)
Armaments: 
4x3 14"/50 (351mm) Cannons
6x3 5"/38 (127mm) DP-AA Guns
4x4 1,1"/75 (28mm)
2-4x Seaplanes (I've choose Vought O5U)
 
 
Scheme C:
north_carolina_preliminary_scheme_c_1934_35_by_tzoli-dc4ssd4.png
This scheme is the same as the previous B, the same hull and layout with the visual difference of the usage of larger calibre main weaponry. Design wise the engine compartment is different having alternating turbine and boiler rooms: 1st boiler room was under the secondary superstructure, with the 2nd under the 2nd funnel while the turbines were under the main superstructure and 1st funnel
 
The design had the following characteristics:
Dimensions: 216,41 wl x 32,31 x 9,27m
Displacement: 36.500tons (standard), 39.430 (maximum)
Armour: 133mm Deck, 337mm Belt
Engines: 180.000shp 4 shafts
Speed: 56km/h (30,5knots)
Armaments: 
4x2 16"/50 (406mm) Cannons
6x3 5"/38 (127mm) DP-AA Guns
4x4 1,1"/75 (28mm)
2-4x Seaplanes (I've choose Vought O5U)
 
 
Scheme D:
north_carolina_preliminary_scheme_d_1934_35_by_tzoli-dc4y4jf.png
Using the same guns as in Scheme C but in triple turrets all forward reminiscent of the British Nelson class with the usual aircraft facilities aft with the addition of a fully enclosed hanger for the seaplanes to protect them from the effects of weather. Engine arrangement is the same as Scheme A so all of the boiler rooms are located forward of the turbine rooms which were located at aft. Another not ordinary and in a way weird thing about this design was the concentration of the main rangefinders on the superstructure close to each other. This makes one of the main rangefidner redundant as only one could face aft and in case of battle damage, it is very likely that both could be taken out leaving the ship with the turret enclosed range finders. This design was the largest among the preliminary studies leading to the final North Carolina class battleships and shows what a well armed and armoured design should look like though this meant the displacement was well over the proposed treaty limits!
 
The design had the following characteristics:
Dimensions: 228,6 wl x 32,31 x 9,75m
Displacement: 40.500tons (standard), 43.730 (maximum)
Armour: 159mm Deck, 432mm Belt
Engines: 185.000shp 4 shafts
Speed: 56km/h (30,5knots)
Armaments: 
3x3 16"/50 (406mm) Cannons
6x3 5"/38 (127mm) DP-AA Guns
6x4 1,1"/75 (28mm) AA Guns
2-4x Seaplanes (I've choose Vought O5U)
 
 
Scheme F:
north_carolina_preliminary_scheme_f_1934_35_by_tzoli-dc51or0.png
Scheme F of the first part of the preliminary study series leading to the North Carolina class battleships was the most unique design in the group but I would say it was among the top 10 unique designs the USN design board presented for the general staff!
It could be seen as a scouting and escort battleship which could use it's floatplanes or other type of aircraft (fighters, bombers) to help the fleet locate the enemy forces and make limited strike from afar but still able to provide gunnery support for the battlefleet by it's 8 14" cannons which were interestingly located all aft. This arrangement resulting a truly weird looking ship with a short armour belt! The forward section was entirely allocated for aircraft facilities, a hanger storing around 10 aircrafts with two cranes to load and unload them onto the catapults, rails or water or recover them. 3 Catapults were designed to launch the planes in wide arcs forward. Also this was the first design featuring the twin rather than triple 5"/38 DP-AA turrets.
This design was preferred by the president Franklin Delano Roosevelt who also preferred the aviation and hybrid cruiser carriers of the 1930's.
 
The design had the following characteristics:
Dimensions: 228,6 wl x 32,31 x 9,75m
Displacement: 40.500tons (standard), 43.730 (maximum)
Armour: 159mm Deck, 432mm Belt
Engines: 160.000shp 4 shafts
Speed: 56km/h (30knots)
Armaments: 
2x4 14"/50 (356mm) Cannons
6x2 5"/38 (127mm) DP-AA Guns
5x4 1,1"/75 (28mm) AA Guns
8-12x Seaplanes (I've choose Vought O5U)
 
 
Scheme H:
north_carolina_preliminary_scheme_h_1934_35_by_tzoli-dc57yov.png
This is basically a modified version of Scheme A but on a reduced scale. The hull was shortened as much as possible and the speed was reduced making this design a traditional slow battleship. The result was a rather bulky or "chubby" looking hull with the main turrets at the extreme forward part and only a single catapult aft. The tonnage gained by these sacrifices went into armour thickness, providing a very good protection for this proposal.
 
The design had the following characteristics:
Dimensions: 182,27 wl x 32,46 x 9,34m
Displacement: 32.500tons (standard), 34.750 (maximum)
Armour: 133mm Deck, 381mm Belt
Engines: 65.100shp, 2 shafts
Speed: 43km/h (23knots)
Armaments: 
3x3 14"/50 (356mm) Cannons
6x2 5"/38 (127mm) DP-AA Guns
4x4 1,1"/75 (28mm) AA Guns
2-4x Seaplanes (I've choose Vought O5U)
 
 
 
Originals can be found here:
  • Cool 4

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