Aviation Fuels

[Rheged]

Modern diesels are getting closer to petrol engines for performance/weight, especially for smaller units, and diesel has a better energy density than petrol, and a mixed turbine/diesel machine could eat common fuel. However, turbines still give the best power/weight, though diesels might(?) still have the best power/fuel ratio.

Hence the Napier Nomad. At the time, it was the most fuel-efficient aircraft engine ever, iirc.

I'd still like to have seen the Nomad engined Shackleton.   Conservatively flown, with in flight refuelling,  a crew could serve an entire tour of duty in one flight!