eehnie wrote:In my comment combat helicopters was refered to all the forms of combat roles, including ASW.
Of course there are smaller helicopters doing this role but are fairly less powerful, and even more fragile. I do not see advantages of their use. Also I would expect the number of ships that currently have not space for a Ka-31 or Ka-52 but have space for a Ka-60 to be very small. The difference of size is not as big, and the coaxial rotor design of the Ka-31 and Ka-52 reduces the rotor diameter from what would be necessary for its size.
To see it approximately with some numbers from the public data:
Disc area diameter (the diameter of the total area sweept by the main rotor of an helicopter):
20.51m Ka-50/52 (330.3m2 disc area)
??.??m Ka-31 (I found no data but must be almost the same than for the Ka-50/52)
13.50m Ka-60/62 (143.1m2 disc area)
This want not to be a precise calculus of the space needed by helicopter, but maybe enough to have a proper idea about the space required by every model.
Surely the Ka-60/62 can have more advantage in operational costs (by moving less weight), and it is useful for some non-combat roles like transport operations where is not needed as big takeoff weight. But in shipborne combat roles to use the Ka-60/62 would lead likely to lower shipborne air power by ship except in very few cases.
Main rotor sweep R does not matter much as navalised platforms mostly have folding rotor blades when stored, and outside on helipad you will have enough space most likely on any ship as 3 sides are not limiting you.
However what does matter is helicopter hangar, and weight that helipad can take. Max takeoff weight of Ka-27PL is almost double compared to Ka-60, 12t vs 6,4t. On some ships you might even be able to have two Ka-60s instead of one Ka-32 in same hangar.
UK also wanted to switch to Merlin-only naval arm, and it proved to be wrong, as Merlins had issue operating from small vessels, they are far more expencive to buy, operate and maintain. So Merlins shall stick to major sized ships, carriers and shore, while Wildcats will do the rest.
US Navy SH-60 Seahawk for an example is alot more comparable to Ka-60 than Ka-27 variants in terms of weight and size.
When its about Ka-52K i dont think it will do much of ASW role, but rather strike and ASuW.