Blackhawk9,
You might wanna compare BK117 with S-76 at Karratha. Last time I was there, BK would leave 76 for dead during summer (A while back I must admit). Well known that even the older LTS101 BK's have more than enough power, let alone the newer Arriel 2 powered versions!! Not all European helicopters are anaemic, and not all yank tanks have power to spare. Horses for courses.