It is constructed almost entirely of conventional aluminum monocoque and integrates crucial drag-reducing winglets, a feature distinctive to the "SPX."
Its rectangular fuselage is identifiable on the ground as well as in the air, keeping frontal nose area to a minimum while maintaining a roomy cabin.
"The ASTRA SPX" relatively small cabin, 375 cubic feet, is typically configured in a club-and-a-half seating arrangement for six passengers.
However, it is certified for up to nine. Because of its design modifications, the cabin is able to accommodate an aft, full-width lavatory and a forward galley, and has a skylight window.
External baggage capacity is 42 cubic feet. Interior measurements are 4.8 feet wide, 17.1 feet long and a near unheard of height in a midsize jet of 5.6 feet.