Project E was the last known proposal of the Radetzky class development series of which I have exact data on armour, armament and it's layout. As you can see it is almost the same as the finished class except the secondary armament being on 19cm's rather 24cm (That was changed later) and the belt armour being thinner at 210mm.
During the 1905 September 29. meeting Josef Mauler insisted on staying with the 19cm secondary armament as these could fire faster and more numerous guns could be mounted which would increase the effective accuracy of the ship and by heavily damaging or destroying the unarmoured parts and upper decks of an enemy ship that would not be able to fight. He voted for the E design and Ripper too agreed with him on this manner.
The next topic was the question of the medium armament. On this matter Ziegler, Baselli, Popper and Jedlička voted for the six 30,5cm armed D variant while Ripper and Mauler gone for variant E with it's four 30,5cm and eight 19cm weaponry. After this Baselli risen the question of the power operations of the turrets which he suggested to be electrically powered which Jedlička too supported saying that the hydraulic system was heavier prone to ice damage and would be more difficult to change it to manual operation. This power system was soon accepted and the meeting was ended after a short discussion about the anti-torpedo-boat armament which became the 10cm calibre.
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 13.100tons (standard), 14.200tons (full load)
Armour: 40mm Deck, 210mm Belt
Engines: Unknown, probably 20.800shp 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 30,5cm/45 Skoda K08 Cannons
4x2 19cm/42 Skoda K03 Guns
12x1 10cm/45 Skoda K07 Guns
2x1 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