“Mathews Mr Easy”的意思、由来-开放百科全书

The Mathews Mr Easy is an American homebuilt aircraft that was designed by Lyle Mathews and associates and produced by the Vintage Ultralight and Lightplane Association of Marietta, Georgia. It was the sixth and final design of Mathews. The aircraft is supplied in the form of plans for amateur construction.^[1]^[2]

Design and development

The aircraft 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}}. The aircraft has a standard empty weight of {{convert|250|lb|kg|0|abbr=on}}.^[1]

Mr Easy features a strut-braced and cable-braced biplane layout, a single-seat, open cockpit, fixed conventional landing gear and a single engine in pusher configuration, mounted above the tail boom tube.^[1]

The aircraft is made from bolted-together aluminum tubing, with its flying surfaces covered in doped aircraft fabric. Its {{convert|24.00|ft|m|1|abbr=on}} span wing has a wing area of {{convert|145.0|sqft|m2|abbr=on}}. The standard engine used is the {{convert|40|hp|kW|0|abbr=on}} Rotax 447 two-stroke twin-cylinder powerplant.^[1]

Mr Easy has a typical empty weight of {{convert|250|lb|kg|abbr=on}} and a gross weight of {{convert|485|lb|kg|abbr=on}}, giving a useful load of {{convert|235|lb|kg|abbr=on}}. With full fuel of {{convert|5|u.s.gal}} the payload for the pilot and baggage is {{convert|205|lb|kg|abbr=on}}.^[1]

The standard day, sea level, no wind, take off and landing roll with a {{convert|40|hp|kW|0|abbr=on}} engine is {{convert|175|ft|m|0|abbr=on}}.^[1]

The designer estimates the construction time from the supplied plans as 250 hours.^[1]

Operational history

In the United States ultralights are not required to be registered, and in April 2014 no examples were in fact registered in the United States with the Federal Aviation Administration, although a total of two had been registered at one time.^[3]

Specifications (Mr Easy)

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|crew=one
|capacity=
|length m=
|length ft=
|length in=
|length note=
|span m=
|span ft=24
|span in=0
|span note=
|height m=
|height ft=
|height in=
|height note=
|wing area sqm=
|wing area sqft=145.0
|wing area note=
|aspect ratio=
|airfoil=
|empty weight kg=
|empty weight lb=250
|empty weight note=
|gross weight kg=
|gross weight lb=485
|gross weight note=
|fuel capacity={{convert|5|u.s.gal}}
|more general=

|perfhide=
|max speed kmh=
|max speed mph=63
|max speed kts=
|max speed note=
|cruise speed kmh=
|cruise speed mph=50
|cruise speed kts=
|cruise speed note=
|stall speed kmh=
|stall speed mph=28
|stall speed kts=
|stall speed note=
|never exceed speed kmh=
|never exceed speed mph=
|never exceed speed kts=
|never exceed speed note=
|range km=
|range miles=120
|range nmi=
|range note=
|endurance=
|ceiling m=
|ceiling ft=
|ceiling note=
|g limits=
|roll rate=
|glide ratio=
|climb rate ms=
|climb rate ftmin=800
|climb rate note=
|time to altitude=
|lift to drag=
|wing loading kg/m2=
|wing loading lb/sqft=3.3
|wing loading note=
|power/mass=
|thrust/weight=
|more performance=
|avionics=
}}

References

1. ^¹²³⁴⁵⁶⁷Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition, page 286. BAI Communications, 15 July 1998. {{ISBN|0-9636409-4-1}}
2. ^{{cite web|url = http://vula.org/blueprint_pricelist.html|title = Blueprints Price List|accessdate = 23 April 2014|last = Perkins | first = Scott, V.U.L.A. Vintage Ultralight and Lightplane Assoc. |authorlink = |year = 2004}}
3. ^{{cite web|url = http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=&Modeltxt=MR+EASY&PageNo=1|title = Make / Model Inquiry Results|accessdate = 23 April 2014|last = Federal Aviation Administration|date = 23 April 2014}}