ok to end this argument about the fastest chopper in the world i have read my copy of Guiness book of records and it does say that a converted lynx AH.8 over 100km circuit got an average speed of 346km/h with a combat load of 2,250lb.That was in 1986 and i've got the yr 2000 copy of the GBOR so i guess us brits have it in the bag heehehehehe!!!!