Guys, common rail technology is the answer to the diesel critics.
Put simply, historically petrol "burned" while diesel "exploded" hence heavy diesel engine weights.
Common Rail technology now allows diesel to "burn". Given the 50% efficiency gain in terms of heat engine output that compression ignition (diesel) has over spark ignition (petrol) its only a matter of time before petrol becomes obsolete.
A modern diesel engine has no weight penalty and a huge power advantage, especially for torque focussed applications such as helos
Big change coming IMHO.
Curveball... what about the sidestick Helo EC are working on...