I was at the Uppermill Yanks Weekend today and these guys were running a 37L V12 Rolls-Royce Griffon engine. Fantastic!
Nophead was complaining to me that he had write a health and safety risk assessment for last weeks MOSI Maker Faire. Goodness knows what the one that these guys produced looked like:
'danger of being dragged into large contra-rotating propellers powered by 1.5MW engine'