Originally Posted by
Fareastdriver
The Turmo 3/C series gas turbines in the 330 Puma started off in life as motive power for French High Speed railway trains. They could run on anything as long as it was liquid. One can of engine oil per drum of Avgas would lubricate the pumps.
Strangely enough, the only "emergency fuel" not specified in the Puma HC1 manuals and FRCs was Diesel. I think the limit for anything else was 10 flying hours.