i have heard exactly the same rumor about ''two separate heavy lift helicopter projects'' currently being under development.One of the somewhat more prevalent rumors that I've seen recently is that there are two separate projects of heavy-lift helicopters under development in China:
- One being a ~10-15-ton payload helicopter (i.e., closer to CH-53K);
- The other being a ~20-25-ton payload helicopter (i.e., closer to Mi-26).
In addition, it has also been rumored that the smaller helicopter is exclusively developed by China (i.e., zero Russian participation), whereas the larger helicopter is (at this stage) a China-dominated project, with Russia playing more of a component supplier/contractor role (said to be for the reduction gearbox and transmission systems).
Of course, do take this information with a pinch of salt for the time being.
Changhe project is in advance stages if we see the tender of production base and WZ-20 heavy duty turboshaft Engine. the program with Russia is make more sense if China really wants close cooperation but so far didn't hear any noise regarding Russia being the supplier of the project. so let see