jet over the short fuselage. The GlobalFlyer was specifically designed to make an uninterrupted (non-refueled) circumnavigation of the globe with a single pilot. Unusual for a modern civil aircraft, the GlobalFlyer has only a single jet engine. The GlobalFlyer has twin tail booms mounted outboard of a shorter central fuselage
nacelle. The pressurized
cockpit is located in the front of the fuselage and provides of space in which the
pilot sits. The single
turbofan engine is mounted in an unusual position above the fuselage at a point several
feet behind the
cockpit, a similar arrangement to that on the
Heinkel He 162 and
Cirrus Vision SF50. The outboard booms contain large fuel tanks and end in tail surfaces, which are not cross-connected. The aircraft is constructed of
carbon fiber reinforced plastic, the main structural member being a high-
aspect-ratio single-spar
wing of span. The wings are made of high-strength
composite materials with the skin of the aircraft being a graphite/epoxy and
Aramid honeycomb. The use of lightweight materials permits the fuel (in 13 tanks) to compose 83% of the take-off weight. The aircraft had an estimated
lift-to-drag ratio of 37. The
aerodynamic drag is so low that, even with the engine idling, the aircraft can only descend at a maximum of . Twin
drogue parachutes were used to slow the GlobalFlyer to landing speeds. The earlier Voyager aircraft structure had been by necessity built so lightly that it significantly deflected under aerodynamic loading. Learning from this experience, Rutan designed the GlobalFlyer to have greater
stiffness. A design using a single jet engine was chosen for the GlobalFlyer for increased reliability over piston engines and faster circumnavigation for the solo pilot. The GlobalFlyer is designed to operate at high altitudes, where the air is colder, yet in-tank fuel heaters were not included in its design. There was some concern that the fuel might freeze if the aircraft used standard jet fuel. Therefore, the GlobalFlyer's
Williams International FJ44-3 ATW turbofan (which normally takes
Jet-A fuel), was re-calibrated to burn
JP-4, which has a substantially lower freezing point. ==First solo nonstop circumnavigation==