TYPE: Light business jet.

PROGRAMME: Launched at EAA Convention at Oshkosh, Wisconsin, July 1997; then known as Twinjet 1200; construction of proof-of-concept prototype, undertaken by Maverick Air of Pueblo, Colorado started September 1999; first flight (N750TJ) 4 August 1999; designated TJ-1500 Twinjet 1500; public debut at EAA AirVenture, Oshkosh, August 2000. Became Maverick Leader in 2002. Prototype destroyed in fatal crach 24 January 2003. FAA/JAA certification planned for 2004.
Production undertaken by Tbilaviamsheni in Georgia, where initial two aircraft were nearing completion in late 2003.

COSTS: Unit cost US$1.25 million; estimated operating cost US$170 per hour or 55 cents per mile (both 2003).

DESIGN FEATURES: Designed using advanced CAD and three-dimensional modelling techniques; design goals include comfort and performance of a traditional business jet in a light piston twin configuration and good short-field performance; unswept, mid-mounted, constant-speed wing with tip tanks; T tail; engines pod-mounted on rear fuselage shoulders.

FLYING CONTROLS: Conventional and manual. Electrically-actuated flaps, approximately two-thirds span; speedbrakes in upper wing; dual (stick) controls; electric trim.

STRUCTURE: Composites, employing prepreg glass/carbon fibre nomex.

LANDING GEAR: Retractable tricycle type with single wheel on each unit; main units retract inwards; nosewheel, forwards; Cleveland brakes.

POWER PLANT: Two 4.89 kN (1,100 lb st) Williams International FJ33-4 turbofans with FADEC, pod-mounted on rear fuselage. Fuel contained in two integral wing tanks and single fuselage tank, combined capacity 1,249 litres (330 US galons; 275 Imp gallons).

ACCOMMODATION: Five persons in pressurised cabin; single upward-opening gullwing door on port side; baggage compartments in nose and to rear of cabin. Leather interior standard.

SYSTEMS: Pressurisation system, maximum differential 0.39 bar (5.6 lb/sq in) maintains 3,050 m (10,000 ft) cabin altitude to 9,150 m (30,000 ft). Split-bus electrical system supplied by two 24 V batteries and two alternators. Airframe anti-icing and oil-heated engine inlets standard.

AVIONICS: Integrated all-glass flight deck.