| 词条 | North American Rotorwerks Pitbull Ultralight | |||||||||||||||||||
| 释义 |
The North American Rotorwerks Pitbull Ultralight is an American autogyro, designed and produced by North American Rotorwerks of Tukwila, Washington. When it was available the aircraft was supplied as a kit for amateur construction, but by 2013 production had been suspended.[1][2][3] Design and developmentThe Pitbull Ultralight was designed to comply with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of {{convert|254|lb|kg|0|abbr=on}}, although the aircraft has a standard empty weight of {{convert|260|lb|kg|0|abbr=on}}. It features a single main rotor, a single-seat open cockpit with a windshield, conventional landing gear and a twin cylinder, air-cooled, two-stroke, single-ignition {{convert|40|hp|kW|0|abbr=on}} Rotax 447 engine in tractor configuration. The dual ignition {{convert|50|hp|kW|0|abbr=on}} Rotax 503 and the Subaru EA81 automotive conversion are both optional.[1][3] The aircraft fuselage is made from bolted-together square aluminum tubing, with the engine mount made from 6061-T6 aluminium. The down-struts are made from 4130 steel tubing. Its {{convert|23.6|ft|m|1|abbr=on}} diameter Fleck rotor has a chord of {{convert|7|in|cm|1|abbr=on}} and is made from extruded aluminum. The landing gear is made from 4130 steel tubing and the tailplane is strut-braced. An electric pre-rotator is standard, while a bubble canopy for year-round flying is optional. With its empty weight of {{convert|260|lb|kg|0|abbr=on}} and a gross weight of {{convert|500|lb|kg|0|abbr=on}}, the useful load is {{convert|240|lb|kg|0|abbr=on}}.[1][3] The aircraft is intended to resemble the autogyros of the 1930s and as such it uses a radial engine-style round cowling, rounded rudder, barrel-shaped fuselage and other antique styling details.[1][2] Operational historyBy January 2013 five examples had been registered in the United States with the Federal Aviation Administration.[4] Variants
Base model with {{convert|40|hp|kW|0|abbr=on}} Rotax 447 or the {{convert|50|hp|kW|0|abbr=on}} Rotax 503 engine. Installed power can be from {{convert|38|to|52|hp|kW|0|abbr=on}}. Estimated construction time from the factory-supplied assembly kit is 50 hours.[1][2]
Higher powered model for the Experimental - amateur-built category, with {{convert|64|hp|kW|0|abbr=on}} Rotax 582 or an {{convert|85|hp|kW|0|abbr=on}} Subaru engine. Installed power can be from {{convert|50|to|85|hp|kW|0|abbr=on}}. Empty weight of {{convert|290|lb|kg|0|abbr=on}} and a gross weight of {{convert|610|lb|kg|0|abbr=on}}, the useful load is {{convert|320|lb|kg|0|abbr=on}}. Estimated construction time from the factory-supplied assembly kit is 80 hours.[1][2] Specifications (Pitbull Ultralight){{Aircraft specs|ref=Bayerl and North American Rotorwerks[1][2] |prime units?=imp
References1. ^1 2 3 4 5 6 Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 184. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X 2. ^1 2 3 4 {{cite web|url = http://www.pitbullrotorcraft.com/|title = North American Rotorwerks presents the Pitbull|accessdate = 12 January 2013|last = North American Rotorwerks|date = n.d.}} 3. ^1 2 Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition, page 327. BAI Communications, 15 July 1998. {{ISBN|0-9636409-4-1}} 4. ^{{cite web|url = http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=&Modeltxt=PITBULL&PageNo=1|title = Make / Model Inquiry Results|accessdate = 12 January 2013|last = Federal Aviation Administration|date = 12 January 2013}} External links
3 : United States sport aircraft 2000–2009|Homebuilt aircraft|Single-engined tractor autogyro |
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