d) I imagine they could run on jet fuel if properly set up, which would simplify fuel arrangements in a lot of places;
Diamond DA42 twine engined fixed wing use the Austro Turbo Diesel, 168hp 125kW using 3.2 gph in loiter. 4 cylinder it weights 185kg.
It uses Jet A1 and Diesel
Initially 1000 TBO, now 1500 TBO for $22k.
Looking at their other engines a rule of thumb for weight to performance seems to be approx 1kg per 1hp.
They are working on a 300hp engine.
http://austroengine.at/uploads/pdf/m...Data_Sheet.pdf
In comparison the R66 RR300 engine weights around 100kg and delivers 224shp continuous at 23gph.
Mickjoebill