John wrote:Super structure, mast and weapons load will definitely lead to higher displacement than Delhi, just look P-17s based on original projections of stretched talwar with some changes the displacement was projected around 5000 Tons but few changes here and there brought it to around 6200 tons. I know we had similar debate back then when i said P-17 displacement will be much higher than current projections, will know in time if same is true.
Talwar dimensions - L*B*T is 124.8*15.2*4.2 Displacement is 4200t
Shivalik - L*B*T is 142.5*16.9*4.5 , Displacement is 6200 tos
So, from talwar to Shivalik, L grows 14.18%, B grows11.18%,T grows 7.14%, while displacement grows a whopping 53.6% .
The block coeff of the Talwar is 0.4940, while for the Shivalik is 0.55. No way the Shivalik is a "stretched" Talwar. It is a new design alright with a basically new hull form. Every dimension has grown apperciably and most importantly , the Shivalik is a "fuller" ship than the Talwar.
That is not the case from the Delhi to Kolkata. The hull is exactly the same. The extra weight if any will be well within design tolerance. I really see no case for growth in weight like the Talwar to Shivalik here. The basic dimensions remain exactly the same!
vina wrote:Per what I read, it has the same propulsion system (and indeed same hull form) as the Delhi class which is COGOG with Ukranian Zorya gas turbines (4 nos, arranged in pairs)
For some reason the sites quoting Kolkata specs seem to list Bergen diesel engines?[/quote]
Those Bergen diesels are for hotel load, not propulsion.