CEI Free Spirit Mk II
The CEI Free Spirit Mk II, also called the Cabrinha Free Spirit Mark II and the Cabrinha Model 423, is a three-seat American homebuilt aircraft that was designed by Richard Cabrinha and produced by CEI of Auburn, California, introduced at AirVenture in 1995. The aircraft was intended to be supplied as a kit for amateur construction, but only prototypes seem to have been completed. Design and development. The design goals of the Free Spirit Mk II included long range, high speed and a high rate of climb. The aircraft features a cantilever low-wing , a two-seats-in-side-by-side configuration, plus a jump seat in an enclosed cockpit, retractable tricycle landing gear and a single engine in tractor configuration. The aircraft is made from lightweight pre-molded composites. Its span wing employs a NASA NLF(1)-0215F natural laminar flow airfoil, mounts flaps and has a very small wing area of , giving a high wing loading of 25.0 lb/sq ft (122 kg/m2). The cabin width is . The acceptable power range is and the standard engine used is the Lycoming IO-360 powerplant. The Free Spirit Mk II has a typical empty weight of  and a gross weight of , giving a useful load of . With full fuel of the payload for crew, passengers and baggage is . Operational history. In 1998 the company reported that two aircraft were flying, but by December 2013 only one example remained registered in the United States with the Federal Aviation Administration.