The Hummel Ultracruiser (also variously called the Ultra Cruiser and UltraCruiser) is an American amateur-built aircraft, designed by Morry Hummel and produced by Hummel Aviation. The aircraft is supplied as a kit or plans for amateur construction or as a complete ready-to-fly aircraft. The Ultracruiser is a development of the heavier Hummel Bird, designed to comply with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of 254 lb (115 kg). The aircraft has a standard empty weight of 249 lb (113 kg). The Ultracruiser features a cantilever low-wing, a single-seat open, or optionally enclosed, cockpit that is 23.5 in (60 cm) wide, fixed conventional landing gear, or optionally tricycle landing gear and a single engine in tractor configuration. The aircraft is made from sheet aluminum. Its 25 ft (7.6 m) span wing employs a Harry Ribblett GA30-618 airfoil and has an area of 112 sq ft (10.4 m2). The aircraft's recommended engine power range is 28 to 45 hp (21 to 34 kW) and standard engines used include the 37 hp (28 kW) 1/2 VW four-stroke powerplant. Construction time from the supplied kit is estimated as 420 hours. Variants Ultracruiser Base model for the US FAR 103 Ultralight Vehicles category, powered by a 37 hp (28 kW) 1/2 VW. Ultracruiser Plus Model for larger and heavier pilots, powered by a 60 hp (45 kW) Volkswagen air-cooled engine, for the US experimental amateur-built category.
