The Premier II, expected to start deliveries by late 2012 or early 2013, takes the IA to the next level—literally. The II will climb to 45,000 feet, where fuel burns more efficiently and fewer headwinds slow progress. The new model also intends to increase range by as much as 20 percent and boost the maximum cruise speed. Updated Williams International FJ44-3AP engines have full electronic controls for added efficiency, and added thrust for taking off at high or hot airports. New blended winglets enhance climb capabilities.