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.Vandermeullen, Richard: 2012 Kit Aircraft Buyer's Guide, Kitplanes, Volume 28, Number 12, December 2011, page 56. Belvoir Publications. ISSN 0891-1851Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, page 111. Flying Pages Europe SARL, 2015.
Design and development 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 . The aircraft has a standard empty weight of .
The Ultracruiser features a cantilever low-wing, a single-seat open, or optionally enclosed, cockpit that is 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 span wing employs a Harry C. Riblett GA30-618 airfoil and has an area of . The aircraft's recommended engine power range is and standard engines used include the 1/2 VW four-stroke powerplant. Construction time from the supplied kit is estimated as 420 hours.
Operational history By December 2011 100 examples had been completed and flown.
Variants Ultracruiser Base model for the US FAR 103 Ultralight Vehicles category, powered by a 1/2 VW. Ultracruiser Plus Model for larger and heavier pilots, powered by a Volkswagen air-cooled engine, for the US experimental amateur-built category.
Specifications (Ultracruiser)
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