And furthermore! Because of no tunnel and no "broom closet" and no engine pan intruding into the headroom, the center passenger in the R-66 has it pretty good...at least compared to a 206 or 500 that is...
The "mixture control" is most certainly the link to a mechanical fuel shutoff valve. Interesting carryover. Let's hope no one attempts to "lean this one out" to get the fuel burn down a little...
With the RR300 mounted on an angle like that, we can assume that Frank is using a driveshaft connection to the trans (wrong angle for a belt?). How and where he reduces the 6600 (or so) output shaft rpm will remain to be seen...as well as where he puts the freewheeling unit - on the engine like the 206 or on the trans.
Probably make an okay sightseeing ship - for short rides. In Japan. I wonder how much of a useful load it will have with floats and air-conditioning?