We had to deal with the French Turbomeca Astazou XViD engine for some of our customers and the French made no concesions to English on labelling engine systems Arrete for Stop, Demarrage for Start and Drapeau for Feather as examples. Same with threads, customer had had to get special pipes made up with AF unions one side and metric the other. They were technically brilliant - on paper at least - around 1,000 shaft horse power with a consumption of less that .5 lbs fuel per shaft horsepower per hour, a figure that still looks good today.
Incidentally on the Eurocopter, I recall seeing a very early one that had holes at the tip of each blade where some of the turbine exhaust bled off. Scary that, got no idea how or if it worked.
Edited by: Victor
2015 Antara Exclusiv 2.2 163ps Manual 2WD