BD-5J which he flew as part of Red Bull's Flying Bulls team. Recently, the BD-5J has operated in the national security arena. The aircraft is certified by the United States Department of Defense as a cruise missile surrogate, with Bishop's Aerial Productions offering a version known as the Smart-1 (Small Manned Aerial Radar Target, Model 1). The radar return and general performance characteristics make it a useful aid in training. On June 27, 2006, while flying one of these aircraft, pilot Chuck Lischer, a highly experienced professional air show pilot, was killed when he crashed into trees on final approach to the Ocean City Municipal Airport in Ocean City, Maryland. The National Transportation Safety Board investigation determined the aircraft returned to land with more fuel than recommended for normal operations and the pilot failed to maintain speed, resulting in a stall and subsequent impact short of the runway. The BD-5J has also held the Guinness record for the World's Smallest Jet for more than 25 years. Bishop originally garnered the record with one of his jets, and in November 2004, the record changed hands to Juan Jiménez, whose BD-5J weighed in at empty, lighter than Bishop's and the lightest documented weight for a BD-5. Variants BD-5 Prototype and initial kit production aircraft with short wingspan. BD-5A Short wingspan version, with wings tuned for high speeds and aerobatics. BD-5B Main piston engined production kits with wings extended to . Kits still available in 2011. BD-5D Factory built versions of the BD-5B. BD-5G Piston-engined production kit with wingspan of and a gross weight of . Kits still available in 2011. BD-5J Jet powered version. Equipped with PBS TJ100 engine with 337 lbf (1,500 N) thrust and 38.8 lb (17.6 kg) weight . BD-5S Sailplane version with extended wingspan. Flight testing was disappointing and further work was abandoned. BD-5T A turboprop conversion by BD Micro Technologies, powered by a Solar T62 gas turbine engine. Acapella 100/200 An unusual adaptation of the BD-5, the Acapella 100 appeared in the early 1980s. Designer Carl D. Barlow of Option Air Reno mated a BD-5 fuselage with a distinctive twin-boom empennage and fitted it with a Continental O-200 engine. Later, a Lycoming IO-360 was fitted, and the span reduced from to , becoming the Acapella 200-S. The prototype of this aircraft was first flown on June 6, 1980, with pilot Bill Skiliar at the controls. Nonetheless, it