I doubt you could call this thing a derivative of the R-22.
On e-bay it seems that one would have to do most of the mast, swashplate, rotor, tail to finish that project.
Just because he hangs a runout R-22 cabin section on it, it does not mean it is a turbine R-22.
I would call it a derivative, if he puts a turbine in it with a reduction gear to match the speeds and keeps everything else R-22.
A turbine does NOT make any sense for the R-44 as the price would go way up. A new Lycoming 540 for the Raven II is around 48.000,- $
The smallest Turbine, probably some RR 250 model at least around 280.000,-
Besides that the R-44 would not use all the power, the fuel consumption would further reduce endurance, and the price goes up to around 590.000,-. Too close to the Jet-Ranger and MD 500.
3top