“Merkel Mark II”的意思、由来-开放百科全书

The Merkel Mark II is an American homebuilt aerobatic biplane that was designed by Edwin Merkel and produced by the Merkel Airplane Company of Wichita, Kansas in the form of plans for amateur construction.^[1]

Designer Merkel died on 12 March 2012 and plans are apparently no longer available.^[2]

Design and development

The Mark II features a two-seats-in-tandem open cockpit with an optional bubble canopy, fixed conventional landing gear and a single engine in tractor configuration. The Mark II was intended as a two-seat trainer version as a companion to a planned single-seat competition version.^[1]

The aircraft is made from welded steel tubing with the airframe covered in sheet aluminum. Its {{convert|25.5|ft|m|1|abbr=on}} span wings employ a NACA 23012 airfoil and each has a single torsional spar. The standard engine recommended was a {{convert|220|hp|kW|0|abbr=on}} Franklin Engine Company powerplant.^[1]^[3]

The aircraft has an empty weight of {{convert|1200|lb|kg|abbr=on}} and a gross weight of {{convert|1540|lb|kg|abbr=on}}, giving a useful load of {{convert|340|lb|kg|abbr=on}}. With full fuel of {{convert|18|u.s.gal}} the payload is {{convert|232|lb|kg|abbr=on}}.^[1]

Specifications (Mark II)

|genhide=
|crew=one
|capacity=one passenger
|length m=
|length ft=22
|length in=9
|length note=
|span m=
|span ft=25
|span in=6
|span note=
|height m=
|height ft=
|height in=
|height note=
|wing area sqm=
|wing area sqft=
|wing area note=
|aspect ratio=
|airfoil=NACA 23012
|empty weight kg=
|empty weight lb=1200
|empty weight note=
|gross weight kg=
|gross weight lb=1540
|gross weight note=
|fuel capacity={{convert|18|u.s.gal}}
|more general=

|eng1 number=1
|eng1 name=Franklin 6A-350-C1{{Citation needed|date=October 2013}}
|eng1 type=air-cooled, horizontally-opposed piston aircraft engine
|eng1 kw=
|eng1 hp=220
|prop blade number=
|prop name=
|prop dia m=
|prop dia ft=
|prop dia in=
|prop note=

|perfhide=
|max speed kmh=
|max speed mph=206
|max speed kts=
|max speed note=
|cruise speed kmh=
|cruise speed mph=160
|cruise speed kts=
|cruise speed note=
|stall speed kmh=
|stall speed mph=55
|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=250
|range nmi=
|range note=
|endurance=
|ceiling m=
|ceiling ft=
|ceiling note=
|g limits=operational: +6/-3, ultimate: +9/-4.5
|roll rate=
|glide ratio=
|climb rate ms=
|climb rate ftmin=2500
|climb rate note=
|time to altitude=
|lift to drag=
|wing loading kg/m2=
|wing loading lb/sqft=
|wing loading note=
|power/mass=
|thrust/weight=
|more performance=
|avionics=
}}

References

1. ^¹²³⁴Plane and Pilot: 1978 Aircraft Directory, page 147. Werner & Werner Corp, Santa Monica CA, 1977. {{ISBN|0-918312-00-0}}
2. ^{{cite web|url = http://bakerfhvc.com/fh/obituaries/obituary.cfm?o_id=1421916&fh_id=13725|title = Obituary For Edwin Merkel |accessdate = 12 October 2013|last = Baker Funeral Home|date = March 2012}}
3. ^{{Cite web|url = http://www.ae.illinois.edu/m-selig/ads/aircraft.html|title = The Incomplete Guide to Airfoil Usage |accessdate = 25 October 2013|last = Lednicer |first = David |authorlink = |year = 2010}}

External links