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This paper describes the design of an advanced, four-place business jet airplane around two Williams-Research WR-19 engines. In addition to the general layout, the performance, weight and balance characteristics of the airplane are described and illustrated by graphical examples. A detailed comparison in terms of fuel-used is made with the Learjet M35, the Cessna Citation I, the Foxjet and several other general aviation twins. It is shown that the airplane described offers substantial advantages in terms of fuel economy over all these airplanes.

The results of a design investigation of some unconventional airplane configurations are reported in this paper. The viability of designing canard and 3-surface airplanes to meet commuter airline needs was investigated. This study was conducted on an airplane designed to carry 30 passengers on 600 n.m. stage lengths, cruising at 0.6 Mach number at an altitude of 28,000 feet. A test ride quality evaluation was also carried out. This indicated that, although considerable performance improvement was possible over existing airplanes of the same type, active ride augmentation systems were needed to achieve airliner levels of comfort. All three airplanes looked good in terms of mission fuel consumption and climb terms. The 3-surface configuration managed to edge out the other two in those same terms.