The Learjet 60XR is a Learjet 60 with the Collins Pro Line 21 avionics unit. Cabin layout has also improved. The new cabin design includes a window in the lavatory. In turn, the Learjet 60 was derived from the Learjet 55.
The Learjet 55 was Lear’s entry into the medium sized business jet field. In designing the 55, Learjet utilized the earlier Longhorn 28/29 wing with winglets and married it to a larger fuselage. The step-down aisle in the cabin has 5 feet 9 inches of headroom. Power is supplied by two Honeywell TFE 731 engines, which produce 3,700 pounds of thrust each.
The Learjet 55B introduced a digital flight deck, modified wings, and an improved interior. The 55C was equipped with delta fins that improve performance and handling. Further improvements and a larger cabin resulted in the Learjet 60. The improved Learjet 60 first flew in June 1991, and the fuselage is 3.5 feet longer than the Learjet 55. It is powered by Pratt & Whitney Canada PW305 turbofan engines.
Deliveries of the Learjet 60XR began in 2006.