The updated version of the Premier was expected to fly in December but that has been moved to this month, according to Hawker Beechcraft. The Premier II will offer improved efficiency thanks to its 3,050-pound-thrust Williams International FJ44-3AP engines. Speed climbs to 465 knots, range increases by 20 percent and the Premier II will be able to climb unrestricted to 45,000 feet and fly a 1,500-nm mission with one pilot and four passengers, according to the company.