Project 22800: "Karakurt" class missile ship #2

kumbor wrote:The engineer who invented these engines was not Yakovlev, but Charomskiy. During WWII he constructed ACh-30 airplane diesel engines, used in some YER-2 and Pe-8 bombers. After the war, production was handed over to Zvezda bureau of Leningrad during the fifties, now Zvezda JSC. Firstly as M-501 then as 42 cyl. M-503, 56 cyl. m-504 and so on. The official russian designation is 42CHSPN 16/17 or corresponding. These engines have unprecedented power to weight ratio, but are rather complicated, they don`t like slow revving, and TBO is lower than in corresponding western engines.

lancelot wrote:It is basically late 1940s technology. That was the peak of radial engines basically.
After that they were mostly replaced with turboprops and turboshafts.

Each of these coupled units has roughly the same power level as the M70FRU2 gas turbine.
Each engine has like 3 MW power and each coupled unit has two of them. The Karakurt uses three coupled units I think.
The M70FRU2 has 7 MW power.

The main issue with replacing the coupled units with these gas turbines would be fuel consumption at low power levels.

In the long term Russia needs to make high speed diesel engines to replace this engine. In particular it will be important for the minesweeper ships and other similar classes.

limb wrote:Why did the USSR keep using primitive radial diesel engines for ships instead of modern turboshafts?

lancelot wrote:

limb wrote:Why did the USSR keep using primitive radial diesel engines for ships instead of modern turboshafts?

Probably because they were more fuel efficient especially while moving at slow speeds. This is important for mining ships or anti-submarine warfare ships.

Krepost wrote:Rumors that BURYA will soon start sea tests in the Baltic.




While the other 3 are still at the old Pella site awaiting completion.
Only one of them has received the 76mm gun.

limb wrote:So wierd how state of the art corvettes have engines from the 1940s.

GarryB wrote:They refined the other engines they put into service for use for themselves, I would expect new build engines would be better made than previous models.

At some stage in the future the goals will be electric motors for propulsion and perhaps efficient gas turbines generating the electricity supply as needed... but who knows how long that would take.

I wonder how much different the engines for the Tu-95 currently are and what sort of issues there would be to marinising those engines and any penalty or perhaps even advantage they might offer in terms of volume and weight and energy output and fuel consumption...

Big_Gazza wrote:Why are Zvezda having issues with producing the M507s for the Karakurts when it seems (at least to the casual observer) that there are no similar delays with the M520s for the Buyan-M?