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词条 Barrows Bearhawk
释义

  1. Design and development

  2. Operational history

  3. Variants

  4. Specifications (Bearhawk)

  5. References

  6. External links

name=Bearhawk image=Bearhawk in flight.jpg caption=

}}{{Infobox Aircraft Type

 type=Amateur-built aircraft national origin=United States manufacturer=R&B Aircraft
AviPro Aircraft
Bearhawk Aircraft		 designer=Bob Barrows first flight= introduced=mid-1990s retired= status=In production (2017) primary user= more users= produced= 2001–present number built=78 (Bearhawk and Patrol models) program cost= unit cost= US$40,500 (kit only, 2015) developed from= variants with their own articles=Barrows Bearhawk Patrol
Bearhawk LSA
}}

The Barrows Bearhawk is an American amateur-built aircraft, designed by Bob Barrows and produced by R&B Aircraft of Fincastle, Virginia, AviPro Aircraft and now Bearhawk Aircraft of Austin, Texas. The aircraft is supplied as a kit or as plans for amateur construction.[1][2][3][4]

Design and development

The Bearhawk was designed as a personal project by Barrows to carry aircraft engines for delivery as freight. It features a strut-braced high-wing, a four-seat enclosed cabin that is {{convert|42.5|in|cm|0|abbr=on}} wide and accessed by doors, fixed conventional landing gear and a single engine in tractor configuration.[1]

The aircraft fuselage is made from welded steel tubing covered in doped aircraft fabric, while the wings are made from aluminum sheet. Its {{convert|33|ft|m|1|abbr=on}} span wing employs a NACA 4412 mod airfoil, has an area of {{convert|180|sqft|m2|abbr=on}} and mounts flaps. The aircraft's recommended engine power range is {{convert|150|to|260|hp|kW|0|abbr=on}} and standard engines used include the {{convert|180|hp|kW|0|abbr=on}} Lycoming O-360 and {{convert|250|hp|kW|0|abbr=on}} Lycoming O-540 four-stroke powerplants. Construction time from the supplied kit is 1200 hours.[1][4][5]

The prototype was fitted with a {{convert|170|hp|kW|0|abbr=on}} Lycoming O-360 burning automotive fuel.[3]

Operational history

By October 2016, 77 examples had been registered in the United States with the Federal Aviation Administration and 11 with Transport Canada.[6][7]

Variants

Bearhawk

Four seat model with a cabin {{convert|42.5|in|cm|0|abbr=on}} wide and a gross weight of {{convert|2700|lb|kg|0|abbr=on}}, with 75 reportedly completed and flown by December 2011. Employs a NACA 4412 airfoil.[1]

Bearhawk Bravo

Improved model introduced at AirVenture in July 2016. The wing has a {{convert|12|in|cm|0|abbr=on}} greater span and {{convert|5|sqft|m2|abbr=on}} greater area and employs a Riblett 30-413.5 airfoil, which gives a {{convert|5|to|8|mph|km/h|0|abbr=on}} higher top speed while retaining a low stall speed. The redesigned airframe also uses aluminum fuselage formers, window sills and door sills, replacing the steel formers and sills in the original model, which provides better corrosion resistance and less weight. The landing gear struts are made of heavy-wall round cross section tubing rather than streamlined tubing, which provides more resistance to sideload failure.[8]

//Barrows Bearhawk Patrol">Patrol

Two-seats in tandem model with a cabin {{convert|32|in|cm|0|abbr=on}} wide and a gross weight of {{convert|2000|lb|kg|0|abbr=on}}, with three reportedly completed and flown by December 2011.[1]

Specifications (Bearhawk)

{{Aircraft specs
|ref=Kitplanes[1]
|prime units?=imp


|genhide=
|crew=one
|capacity=three passengers
|length m=
|length ft=23.5
|length in=
|length note=
|span m=
|span ft=33
|span in=
|span note=
|height m=
|height ft=
|height in=
|height note=
|wing area sqm=
|wing area sqft=180
|wing area note=
|aspect ratio=
|airfoil=NACA 4412 mod
|empty weight kg=
|empty weight lb=1400
|empty weight note=
|gross weight kg=
|gross weight lb=2700
|gross weight note=
|fuel capacity={{convert|50|u.s.gal}}
|more general=


|eng1 number=1
|eng1 name=Lycoming O-540
|eng1 type=six cylinder, air-cooled, four stroke aircraft engine
|eng1 kw=
|eng1 hp=250
|prop blade number=2
|prop name=constant speed
|prop dia m=
|prop dia ft=
|prop dia in=
|prop note=


|perfhide=
|max speed kmh=
|max speed mph=
|max speed kts=
|max speed note=
|cruise speed kmh=
|cruise speed mph=155
|cruise speed kts=
|cruise speed note=
|stall speed kmh=
|stall speed mph=40
|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=625
|range nmi=
|range note=
|endurance=
|ceiling m=
|ceiling ft=
|ceiling note=
|g limits=
|roll rate=
|glide ratio=
|climb rate ms=
|climb rate ftmin=1700
|climb rate note=
|time to altitude=
|sink rate ms=
|sink rate ftmin=
|sink rate note=
|lift to drag=
|wing loading kg/m2=
|wing loading lb/sqft=15
|wing loading note=
|power/mass=
|thrust/weight=
|more performance=
|avionics=
}}

References

1. ^1 2 3 4 5 Vandermeullen, Richard: 2012 Kit Aircraft Buyer's Guide, Kitplanes, Volume 28, Number 12, December 2011, page 44. Belvoir Publications. ISSN 0891-1851
2. ^{{cite web|url = http://www.bearhawkaircraft.com/Bearhawk/barrowsbio.html|title = Bob Barrows Biography|accessdate = 1 November 2012|last = Bearhawk Aircraft|date = n.d.|deadurl = yes|archiveurl = https://web.archive.org/web/20120903093455/http://www.bearhawkaircraft.com/Bearhawk/barrowsbio.html|archivedate = 3 September 2012|df = }}
3. ^1 Purdy, Don: AeroCrafter – Homebuilt Aircraft Sourcebook, Fifth Edition, page 232. BAI Communications, 15 July 1998. {{ISBN|0-9636409-4-1}}
4. ^1 Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015–16, page 102. Flying Pages Europe SARL, 2015. {{ISSN|1368-485X}}
5. ^{{Cite web|url = http://www.ae.illinois.edu/m-selig/ads/aircraft.html|title = The Incomplete Guide to Airfoil Usage |accessdate = 3 January 2012|last = Lednicer |first = David |authorlink = |year = 2010}}
6. ^{{cite web|url = http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=&Modeltxt=BEARHAWK&PageNo=1|title = Make / Model Inquiry Results|accessdate = 27 October 2016|last = Federal Aviation Administration|date = 27 October 2016}}
7. ^{{cite web|url=http://wwwapps.tc.gc.ca/Saf-Sec-Sur/2/CCARCS-RIACC/RchSimpRes.aspx?cn=%7c%7c&mn=%7cBEARHAWK%7c&sn=%7c%7c&on=%7c%7c&m=%7c%7c |title=Canadian Civil Aircraft Register |accessdate=27 October 2016 |last=Transport Canada |date=27 October 2016 |deadurl=yes |archiveurl=https://web.archive.org/web/20110718042755/http://wwwapps2.tc.gc.ca/Saf-Sec-Sur/2/ccarcs/aspscripts/en/quicksearch.asp |archivedate=18 July 2011 |df= }}
8. ^{{cite web|url=http://www.avweb.com/avwebflash/news/Bearhawk-Announces-the-Bravo-Model-226673-1.html|title=Bearhawk Announces The Bravo Model|work=AVweb|accessdate=2 August 2016}}

External links

{{Commons category|Barrows Bearhawk}}
  • {{Official website|http://www.bearhawkaircraft.com}}
{{Bob Barrows aircraft}}

5 : Homebuilt aircraft|Single-engined tractor aircraft|United States civil utility aircraft 1990–1999|Barrows aircraft|High-wing aircraft
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