Chinese-European transport helo project

A major point in the development of larger helicopters is the weight of the gearbox of a main rotor. That weight grows significantly more than linearly with an increase in power transmitted. It took an awful long time for the US to reach the technological level reached by Mil in the Mi-6 that first flew in 1957.
The Mi-26 gearbox was another step and a new step might now be made by printing many parts of the gearbox from titanium. There might be the connection: Russian gearbox designers and Chinese titanium printers.

I thought of another component that can be printed: a titanium main rotor shaft.
A configuration I have not yet seen: a contra-rotating main rotor system with the upper rotor with a larger diameter than the lower rotor, the upper rotor with say four blades and the lower rotor with one blade more. This would improve the efficiency and reduce noise compared with the Kamov system as the flow around the tips of the lower rotor blades is less disturbed by the vortices shed from the upper rotor blade tips.

kroko said:

Russians talk about china wanting to develop super-heavy helicopter with russia, with apparently twice the capacity of MI-26.

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what do you think of it?

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Has any chinese official source talked about this? Since it appears that it is the russians who are doing all the talk about this project, i wonder if the chinese are really that much interested in it.

You mean like the su35buy that never materializes. Its possible its also possible that in this case the Russians are more trying to propose a industry partnership, this story was attached to a new wide body airliner joint that seems a bit out of character given Comac's c919 seems to be an attempt to toss off Russian civil aviation.