hanumadu wrote:
Hmm. Twin 5 bladed screws (pretty high expanded area ratio , you would normally have 4 screws for 15 to 20 knots cruising speeds in civil/commercial vessels, ), each screw is probably taking some 75,000 shp I think , can see the passive roll stabilizer in the side , normal A brackets holding the shafts, pretty conventional hull form design.
Ideally would have liked to see an all electric power station concept with Azipods (three in number), like this, with a bow thruster in the stem of the vessel. Notice even for high speed, cruise ships (with around similar displacement as Vikrant and also probably similar or even superior maneuvering requirements as Vikrant, the number blades per screw is typically 4. What the screws on the Vikrant look more like submarine screws to me. Maybe this 5 blades is because of the use of only 2 shafts and the need to absorb all that power in just two shafts.
On another note by looking at the pic , there props on the Vikrant seem smaller than what the clearance that seems available , they could have gone for a bigger , slower spinning prop (will be more efficient) with 4 blades, rather than the smaller 5 blade prop. This prop seems more like a submarine prop to me. I wouldn't be surprised if this just a drag and drop of the Arihant's power shaft and power train to the Vikrant.
Two Vikrant class for the west coast and one for the east coast would be good for the next 20 years at least. 
