Bearhawk 5
{{Use dmy dates|date=May 2020}}
{{Use American English|date=May 2020}}
{{short description|Amateur-built aircraft design}}
{{Infobox Aircraft Begin
| name = Bearhawk 5 | image = Bearhawk Model 5 - Perspective.jpg | caption = }}{{Infobox Aircraft Type | type = Amateur-built aircraft | national origin = United States | manufacturer = Bearhawk Aircraft | designer = Bob Barrows | first flight = 3 May 2020 | introduced = 2020 | retired = | status = In production (2023) | primary user = | more users = | produced = 2020-present | number built = One | program cost = | unit cost = | developed from = Bearhawk 4-Place Model B | variants with their own articles = }} |
The Bearhawk 5 is a five-to-six seat American amateur-built aircraft, designed by Bob Barrows and under development by Bearhawk Aircraft. The aircraft is supplied as a kit for amateur construction.{{cite web|url = https://www.avweb.com/aviation-news/bearhawk-introduces-6-seat-homebuilt/|title = Bearhawk Introduces Six-Seat Homebuilt|access-date = 22 May 2020|last = Cook|first = Marc|work = AVweb|date = 21 May 2020|archiveurl = https://archive.today/20200522234919/https://www.avweb.com/aviation-news/bearhawk-introduces-6-seat-homebuilt/|archivedate = 22 May 2020|url-status = live}}{{cite web|url = https://www.planeandpilotmag.com/article/bearhawk-5-takes-flight/|title = Bearhawk 5 Takes Flight|access-date = 22 May 2020|last = King|first = Jeremy|work = Plane & Pilot|date = 22 May 2020|archiveurl = https://archive.today/20200523002516/https://www.planeandpilotmag.com/article/bearhawk-5-takes-flight/|archivedate = 23 May 2020|url-status = live}}{{cite web|url = http://www.aero-news.net/index.cfm?do=main.textpost&id=2f8ae2fa-b182-4644-922b-ca2a41af72c4|title = Big Upgrade -- Bearhawk Introduces 6-Place Bearhawk 5|access-date = 22 May 2020|work = Aero News Network|date = 22 May 2020|archiveurl = https://archive.today/20200523002646/http://www.aero-news.net/index.cfm?do=main.textpost&id=2f8ae2fa-b182-4644-922b-ca2a41af72c4|archivedate = 23 May 2020|url-status = live}}
Development
The design was initiated at the request of a friend of Bob Barrows, who was looking for a Bearhawk 4-Place, but with greater capacity. Barrows completed the drawings and the builder started construction of the design, until health issues caused him to abandon the project. A year later, Mark Goldberg, president of Avipro/Bearhawk Aircraft, described the incomplete project to Collin Campbell of Bolivar, Missouri, who was looking for a new building project, after having built several Bearhawk designs in the past. Campbell agreed to complete the prototype and it first flew on 3 May 2020. By 21 May 2020 the prototype had completed five hours of test flying.
Design
Based on the Bearhawk 4-Place Model B, the new design is {{convert|2|in|cm|0|abbr=on}} wider, with a cabin {{convert|14|in|cm|0|abbr=on}} longer and an overall length {{convert|24|in|cm|0|abbr=on}} longer. The stretched cabin permits the installation of a fifth and sixth seat or additional baggage.
The aircraft features a strut-braced high-wing, a five or six seat enclosed cabin accessed by doors that is wide, fixed conventional landing gear and a single engine in tractor configuration.
The fuselage is constructed from welded 4130 steel tubing covered with doped fabric, while the wings are constructed from riveted aluminum sheet.{{cite web|url = https://bearhawkaircraft.com/bearhawk-model-5/|title = Model 5|access-date = 27 June 2023|work = Bearhawk Aircraft}} The wings are identical to the Bearhawk 4-Place Model B, employing the same Riblett 30-413.5 airfoil{{cite web|url = https://bearhawkaircraft.com/bearhawk-4-place/|title = Bearhawk 4-Place|access-date = 27 June 2023|work = Bearhawk Aircraft}} and mounting flaps. The aircraft's recommended engine power range is {{convert|250|to|315|hp|kW|0|abbr=on}} and standard engines used include the {{convert|250|hp|kW|0|abbr=on}} Lycoming O-540, although the recommended engine is the {{convert|315|hp|kW|0|abbr=on}} Lycoming IO-580 four-stroke powerplant.
The test pilot, Rollie van Dorn, noted, "the Bearhawk Model 5 offered no surprises on takeoff or climb out. With all that power, things happen quickly."
Operational history
As of December 2023, the prototype and three kit built examples have been registered in the United States with the Federal Aviation Administration.{{cite web|url = https://registry.faa.gov/aircraftinquiry/Search/MakeModelResult|title = Make / Model Inquiry Results|accessdate = 3 December 2020|author = Federal Aviation Administration|date = 3 December 2020}}
In an extensive flight review in December 2020, AVweb writer Paul Dye note of its flight characteristics, "you’re obviously not going to mistake the Bearhawk 5 for a single-seat acrobatic machine, but both roll and pitch forces were surprisingly light for an airplane of this size. Rudder was appropriate and positive, and all three axes were harmonious enough to easily fly the airplane in formation with no prior practice. Of course, when working in formation, nothing is better than an excess of power for rapid acceleration when you need to pull forward (coupled to a constant-speed prop that slows you down quickly when you need to back up in a hurry), and the Bearhawk 5 has plenty of extra power. The three-blade Hartzell does a great job of turning that power into both acceleration and deceleration, so the package works pretty well."{{cite web|url= https://www.avweb.com/features/bearhawk-5-big-brawny-homebuilt-hauler/|title= Bearhawk 5: Big, Brawny Homebuilt Hauler|access-date= 3 December 2020|last= Dye|first= Paul|work= AVweb|date= 1 December 2020 |archive-url= https://web.archive.org/web/20201203125722/https://www.avweb.com/features/bearhawk-5-big-brawny-homebuilt-hauler/|archive-date= 3 December 2020|url-status= live}}
Specifications
{{Aircraft specs
|ref=AVweb, Plane & Pilot, Aero News Network and Bearhawk Aircraft
|prime units?=imp
|genhide=
|crew=one
|capacity=five passengers
|length m=
|length ft=25
|length in=6
|length note=
|span m=
|span ft=34
|span in=
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|height m=
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|wing area sqm=
|wing area sqft=186
|wing area note=
|aspect ratio=
|airfoil=Riblett 30-413.5
|empty weight kg=
|empty weight lb=1512
|empty weight note=(projected)
|gross weight kg=
|gross weight lb=3000
|gross weight note=
|fuel capacity={{convert|55|u.s.gal}}
|more general=
|eng1 number=1
|eng1 name=Lycoming IO-580
|eng1 type=six cylinder, air-cooled, four stroke aircraft engine
|eng1 kw=
|eng1 hp=315
|prop blade number=3
|prop name=Hartzell Propeller carbon-fiber Trailblazer constant speed propeller
|prop dia m=
|prop dia ft=
|prop dia in=82
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|max speed kmh=
|max speed mph=180
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|cruise speed mph=160
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|stall speed mph=40
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|wing loading kg/m2=
|wing loading lb/sqft=16.1
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References
{{reflist}}
External links
{{Commons category}}
- {{Official website|https://bearhawkaircraft.com/bearhawk-model-5/}}
{{Bob Barrows aircraft}}
Category:Single-engined tractor aircraft
Category:2020s United States sport aircraft
Category:2020s United States civil utility aircraft