Rotor-blade ice protection is a key part of the full ice-protection system and gives the AW139 full-weather capability. The automated system uses DuraTherm electrothermal mats designed to tolerate ...

The AW139 aircraft are required to have new tail rotor blades fitted Two coastguard ... They can fly at a cruising speed of 140 knots with a top speed of 167 knots.

In other words, matching the performance of the AW139 ... tail rotor which is canted at 12° to provide additional lift, a rear “biplane” stabiliser on the tail to improve low-speed handling ...