Ersatz Monarch Project X

After the last series of 34,5cm armed battleship designs were offered to the navy, the Ministry held a meeting in June 1912 to discuss the various proposals. On the meeting headed by Vice-Admiral Karl Kailer von Kaltenfels and chief naval architect Franz Pitzinger was also present who briefly commented on all the designs. By early July of 1912 the meeting concluded the following:
- 23.400 tons of displacement were too small for a well designed battleship and thus 24.500tons of displacement was chosen
- A new set of gun calibre was chosen: 35cm (Minimum 10 guns) as the final calibre which could use a standardised shell then under development by Krupp and the Imperial German Navy
- 18x 15cm secondary guns
- 9cm (88mm) tertiary guns
- Minimunm of 300mm Belt armour
- Minimum of 21knots speed

After these new set of requirements were formalised, the 3 shipyards were asked again but sadly I have only info on the MTK proposals as well as a single design from Ganz-Danubius. The Ganz-Danubius proposal is a bit different from the other designs as it was shorter but beamier resulting in a more stable gun platform but required a stronger engine due to the worse beam to length ratio and would had a single funnel. The MTK proposals were preferred and most have two versions done: one with superfiring triple the other with superfiring twin turrets also introducing casemates on two levels front to maximise forward fire..
While the Naval Ministry preferred superfiring twin turrets as they know the results of the trials done by SMS Viribus Unitis and SMS Tegetthoff which showed that these ships were top heavy (which is more about maximum weaponry on a limited displacement as Viribus Unitis class was the smallest battleship design which could carry 12x 30,5cm cannons) still the designers offered superfiring triple turrets as these showed better lines for the curves of the hull front and aft and also reduced citadel width which was also saving tonnage. On the other hand superfirign twin turrets would result in a more stable gun platform due to the less topweight the twin turrets offered.

The new designs were finished by January 1913 with Ganz Danubius's proposal by March:
Project X: 24.500tons, 2x3,2x2 35cm, 18x1 15cm, 16x1 9cm, 6x1 9cm AA, 6x 53cm Underwater Torpedo tubes
Project XI: 24.500tons, 2x3,2x2 35cm, 18x1 15cm, 16x1 9cm, 4x1 9cm AA, 6x 53cm Underwater Torpedo tubes
Project XII: 24.650tons, 2x3,2x2 35cm, 18x1 15cm, 16x1 9cm, 4x1 9cm AA, 6x 53cm Underwater Torpedo tubes

On 23rd April 1913 the Command of the Navy ordered the NTC to rework the January 1913 design: after some weight saving modifications it had to thicken the armour of the belt, the barbettes and the conning tower. In addition, it had to completely redesign the electric system of the ship and thus Project XI was born.

Apparently the Austro-Hungarian naval architects felt that such stripped down designs would not be well balanced and presented two enlarged alternative designs with heavier weaponry and speed increment to 23knots in January 1914, showing that more displacement was required for a more balanced battleships.
These two designs are:
Project XIII / Pre-project I: 29.600tons, 4x3 35cm, 18x1 15cm, 8x1 9cm, 10x1 9cm AA, 6x 53cm Underwater Torpedo tubes
Project XIV / Pre-project II: 32.000tons, 3x3,2x2 35cm, 18x1 15cm, 8x1 9cm, 10x1 9cm AA, 8x 53cm Underwater Torpedo tubes

These two were of course not chosen due to the building limitations of the shipyard facilities, but a 40.000ton Floating dock was ordered from Germany just before WW1 broke out.
But the tonnage limit was kept upright so in July 1914 the last design variants was presented. For weight reasons the number of secondary guns was reduced to 14x 15cm and tonnage set at 24.560tons:

Project XV: 24.560tons, 2x3,2x2 35cm, 14x1 15cm, 10x1 9cm, 12x1 9cm AA, 6x 53cm Underwater Torpedo tubes
Final Project / Project XVI: 24.560tons, 2x3,2x2 35cm, 14x1 15cm, 8x1 9cm, 12x1 9cm AA, 6x 53cm Underwater Torpedo tubes

Due to some copyright issues I can only provide links to the the plans of the 1913 project ( Project X ):
https://stefsap.wordpress.com/2015/10/15/1200-kuk-ersatz-monarch-section-original-plans/
https://stefsap.wordpress.com/2015/10/15/1200-kuk-ersatz-monarch-top-view-original-plans/

But I had access to the original plans of the Final Project and the two enlarged Pre-Projects as well, for others I had only data from the Viribus Unitis site (currently under reconstruction)
http://www.viribusunitis.ca/
And from friends.

Data on the Design:
Dimensions: 172 (wl), 173,2 (oa) x 28,5 x 8,4m
Displacement: 24.500tons (standard)
Engines: 30.000shp Steam Turbines, 4 shafts
Speed: 39km/h (21knots)
Armour: 320mm Belt, 72mm Deck
Armaments:
2x3,2x2 35cm/45 Skoda K14 Cannons,
18x1 15cm Skoda K10 Casemated Guns,
16x1 9cm/45 Skoda K12 Guns
6x1 9cm/45 Skoda K16 AA Guns
6x1 53cm Underwater Torpedo tubes