The Hawker 400XP is an ideal light private jet for short trips, striking a balance between comfort, performance, and operating costs that make it a competitive option for business clients. Its unique square-oval cabin design provides 305 cubic feet of interior space, providing more head and shoulder room than typically found in other competing light private jets. The Hawker 400XP is also one of the fastest light business jets, with its Pratt & Whitney JT15D-5R engines allowing the Hawker 400XP to reach a maximum cruise speed of 450 knots, while providing impressive climb performance to its service ceiling of 45,000 feet - far above traffic and most weather. destination more quickly and efficiently. Powered by twin altitude capability of 45,000 feet.