The Hawker 400XP is another improved variant of the Diamond I, a small Japanese business jet that was first introduced in the late 1970s. The 400XP also features some aerodynamic and structural improvements featured on its slightly newer and bigger cousin, the Hawker 800XP.
Although it is classified as a light business jet and it possesses the sleek appearance typical of aircraft in that category, the Hawker 400XP is anything BUT light. Its solid construction and stability help it withstand flying through turbulence and above congested airspace (though pilots concede it handles more like a dump truck instead of an aircraft because of these traits). Its top speed of 539 mph and cruising speed of 510 mph are not typical for light jets but for larger mid-sized jets like the Learjet 55. Lastly, its maximum range of 1949 miles is close to the 2000 miles and up ranges of its heavier contemporaries.
Included in the Hawker 400XP’s amenities are plush interior fittings and standard vapor cycle air-conditioning. The “square-oval” design of the fuselage results in a passenger cabin with greater head and shoulder room than that of its direct predecessor, the Model 400 Beechjet. There is enough accommodation for up to 8 passengers and 53 cubic feet of baggage space.