Kamov/Sikorsky has experience. Not India.
Plus it's an interesting exception to the rule at best. It has not proven itself to be a clearly advantageous tech & despite the concept being around for years everybody didn't immediately jump ship. Several engines may make it's fuel consumption too high... for the speed it offers & all future concepts are still concepts.
IMO tilt rotors hold more promise with vertical lift & horizontal propelling. Maybe IAF will demand compound rotor or tilt rotor, if that's considered necessary.
I am not merely pushing for a compound/coaxial rotor. It has to be a compound rotor with pusher prop design!
Only reason compound/coaxial rotors (which eliminated tail rotors) didn't make a huge dent thus far is because the maneuverability was not a slick as it was with a tail rotor!
But with a pusher prop, the game changes completely. Helicopter, which had a natural speed limit (due to lift at one side of the rotor blades reducing drastically with increased forward speed that requires increased rpm). Since, pusher propellers provide all the forward speed, rotors need to spin (at reduced rpm) only to counter the downward weight! The reduced rpm on the rotor blades don't encounter the lift-loss (at high forward speed) that I described earlier.
Net-net. You have a helo moving at twice the speed of conventional helos.
Tilt rotors are significantly more complex to develop. Even US took several decades to master it. V-22 was in a bug-fix mode for decades!!!!
Pusher propeller is very easy to engineer. There's already a shaft that runs from engine to tail to transmit power. The pusher prop will need a slightly bigger shaft to transmit more power to a tail-rotor tilted 90 deg.
Compound rotor only needs replicate the existing rotor with a gear-mechanism that spins it in opposite direction. Fairly simple!
Turns are achieved both via tail fins (easy) or by varying individual rotors speeds (slightly complex).