A400M to have 'handed' propellers -18/05/2004-Flight International
... gives the manufacturer's view, some years ago.
Airbus A400M Counter-Rotating Prop Configuration — Tech Ops Forum | !!!!!!!!!!!!!!
... if people who read this forum are not too grand for it, gives a moderately interesting run-through of the sundry pros and cons.
L'AVION
... gives nice pictures (worth a thousand words) describing a term which I've managed not to hear in a few years of relatively broad aerospace experience.
Y