There is no particular limitation in using both diesel and steam turbine as generators for electric motors. To have reliable and powerful diesel and electric engines this early could be difficult but once you have to combine both with a steam plant present no technical challenge.
It's diesel (or diesel & turbine) powered, and there were a bit of... overoptimistic assumptions about diesel performance in 1900s.
From when dates this armoured cruiser project. I suppose after 1911?
3 Diesel and 2 turbines or 3 turbines?
Incoherent. On scheme, turbines and electric motors are mentioned. In text, diesels and boilers are mentioned.
I knew I had seen the cover illustration somewhere...(excerpt, obviously from this publication)
According to Friedman it was also offered to Brazil but with only 10x 6" guns and a displacement of 28.950tons
Does anybody have more on this unusual design?8 x 12 " (2 x 2 and 4 x 1), and 20 (?) x 120 mm guns
It was a 10.000-ton coastal battleship, presented by engineer G. Ahenbah for a design contest of Russian Engineering Society in 1905. The goal was a small coast defense battleship, armed with ten 12-inch guns. The model on the photo was supposed to have three dual 12-inch turrets - two superfiring on bow, one on stern - and four 12-inch guns in casemates. For some reason, the rear turret is missing on model (one theory is, Ahenbah realized too late that his calculations are wrong, and removed rear turret to make ship lighter. The other theory is that model was just accidentally damaged before photo).
Seems that it's from the same design competition. At least displacement, speed and main armament fits the competition goals.
what was the orginal source you used for details mentioned above?
Hm, it would took some time to recall now, after year since original discussion!
Ho Lee Fuk, I want some of whatever that person is smoking...
That's burning a LOT of fuel in the boilers to maintain 20-knot speed if wanted. IIRC, basically burning as much fuel as actually doing 20 knots on the boilers...
I wonder how much boiler pressure you could maintain just on the exhaust heat from the diesels? There was an experiment to do something similar with a locomotive where under normal driving conditions the boiler was kept operational just on the diesel exhaust, but for overload an oil-fired boiler would increase steam production.
That is a good question!
I am offended that my article in Russian about the project of the battleship engineer Kostenko of 1916-1917 was removed from Wikipedia because allegedly this project never existed, as if I had made it up. Moreover, Wikipedia continues to have an article about the fictional Soviet battleship K-1000.
Very interesting. Judging by the 7-inch guns' weight, they would likely be in single shielded mounts. So... Super-Svetlana?
Not exactly. IIRC, there was a theoretical assumption (based on Russo-Japanese war experience) that 6-inch guns aren't powerful enough to penetrate even thin armor at modern combat distances, and 8-inch guns are too heavy, and could not be reloaded manually. So there were a lot of theoretical proposals to produce an intermediate, 7-inch cannon.
I'd argue that 6" guns are the largest you can reload manually, 100lb/45kg shells are really the max.
Generally yes, but 1900s admirals seems to be optimistic in that matter. If I recall correctly, they argued that since shield mountings are only lightly protected, the mechanized loading systems would be too prone to jamming, and thus such guns must be able to be manually reloading. The 7-inch cannons have shell about 75-100 kg, which THEORETICALLY could be handled by two sailors.
Because it was not their own backs that were broken.
