Radetzky Class Preliminary Project D

Project D is basically a modification of the previous C, where all the 28cm turrets got replaced with either twin or single 30,5cm ones making it the smallest dreadnought like battleship if built, smaller then the Spanish Espana and only lack one barrel per broadside and despite it's older engines it would had been faster as well.

At the 1905 September 29. meeting, after the calibre question was discussed the next topic was the number and arrangement of the primary armament. Friedrich Jedlička, Freih Victor von Baselli-Süßenberg, Siegfried Popper and Lucian Eugenio Ziegler de Lintz-Pozza agreed that the 6x 30,5cm armed version was desirable, though if there were issues with developing the 30,cm cannons at Skoda then the 28cm armed C version. Ziegler added that after the experiences of the battle of Tsushima of that year show that neither the 15 nor even the 20cm Guns were adequate and the new battleships had to carry the largest number and largest heavy guns possible.

The design had the following characteristics:
Dimensions: Unknown except the width so I've used the data of the Radetzkys: 137,5m (wl) 138,8m (oa) x 24,0m x 8,1m
Displacement: Unknown, probably 12.850tons (standard), 13.950tons (full load)
Armour: 40mm Deck, 210mm Belt
Engines: Unknown, probably 20.500shp Yarrow Vertical Triple Expansion Engines, 2 Shafts
Speed: 38km/h (20,5knots)
Range: 7.400km at 18,5km/h (4.000nm at 10knots)
Armaments:
2x2,2x1 30,5cm/45 Skoda K08 Cannons
16x1 10cm/45 Skoda K07 Guns
4x1 7cm/50 (66mm) Skoda K10 Guns
3x1 45cm Underwater Torpedo tubes

The only known sketch series about the 1905 projects:
https://i.imgur.com/qRaH57v.jpg