Barrows Bearhawk

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Bearhawk
Bearhawk in flight.jpg
General information
Type Amateur-built aircraft
National origin United States
Manufacturer Bearhawk Aircraft
Designer
StatusIn production (2017)
Number built78 (Bearhawk and Patrol models)
History
Manufactured2001–present
Introduction datemid-1990s
Variants Barrows Bearhawk Patrol
Bearhawk LSA
Bearhawk 5
AviPro Bearhawk Avipro Bearhawk N844EE LKL 29.03.11R edited-3.jpg
AviPro Bearhawk
AviPro Bearhawk Avipro Bearhawk (N303AP).jpg
AviPro Bearhawk

The Bearhawk, now also called the Bearhawk Four, is an American amateur-built aircraft, designed by Bob Barrows and produced by Bearhawk Aircraft of Fairview, OKlahoma. The aircraft is supplied as a kit or as plans for amateur construction. [1] [2] [3] [4]

Contents

Design and development

The Bearhawk was designed in the early 1990s [5] 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 42.5 in (108 cm) 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 33 ft (10.1 m) span wing employs a NACA 4412 mod airfoil, has an area of 180 sq ft (17 m2) and mounts flaps. The aircraft's recommended engine power range is 150 to 260 hp (112 to 194 kW) and standard engines used include the 180 hp (134 kW) Lycoming O-360 and 250 hp (186 kW) Lycoming O-540 four-stroke powerplants. Construction time from the supplied kit is 1200 hours. [1] [4] [6]

The prototype was fitted with a 170 hp (127 kW) Lycoming O-360 burning automotive fuel, [3] but in August 2023, the option of fitting the DeltaHawk DHK180 type certified, two-stroke 180 hp (134 kW) diesel engine was added. [7]

Operational history

By October 2016, 77 examples had been registered in the United States with the Federal Aviation Administration and 11 with Transport Canada. [8] [9]

Variants

Barrows Bearhawk Patrol Donald M Aldridge - j Hatcher Fe Bearhawk Patrol (N774PK).jpg
Barrows Bearhawk Patrol
Bearhawk (4-Place Bearhawk)
Four seat model with a cabin 42.5 in (108 cm) wide and a gross weight of 2,700 lb (1,225 kg), 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 12 in (30 cm) greater span and 5 sq ft (0.46 m2) greater area and employs a Riblett 30-413.5 airfoil, which gives a 5 to 8 mph (8 to 13 km/h) 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. [10]
Patrol
Two-seats in tandem model with a cabin 32 in (81 cm) wide and a gross weight of 2,000 lb (907 kg), with three reportedly completed and flown by December 2011. [1]
Companion
Two-seats in side-by-side configuration model, with a gross weight of 2,200 lb (998 kg). First customer deliveries in October 2019. [11]

Specifications (Bearhawk)

Data from Kitplanes [1]

General characteristics

Performance

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References

  1. 1 2 3 4 5 6 Vandermeullen, Richard: 2012 Kit Aircraft Buyer's Guide, Kitplanes, Volume 28, Number 12, December 2011, page 44. Belvoir Publications. ISSN 0891-1851
  2. ↑ Bearhawk Aircraft (n.d.). "Bob Barrows Biography". Archived from the original on September 3, 2012. Retrieved November 1, 2012.
  3. 1 2 Purdy, Don: AeroCrafter – Homebuilt Aircraft Sourcebook, Fifth Edition, page 232. BAI Communications, 15 July 1998. ISBN   0-9636409-4-1
  4. 1 2 Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015–16, page 102. Flying Pages Europe SARL, 2015. ISSN   1368-485X
  5. ↑ Spangler, Cook (July 19, 2013). "The Airfoil Adventures of Harry Riblett". Kitplanes. Connecticut, United States. Retrieved December 1, 2023.
  6. ↑ Lednicer, David (2010). "The Incomplete Guide to Airfoil Usage". Archived from the original on July 19, 2011. Retrieved January 3, 2012.
  7. ↑ Cook, Marc (August 7, 2023). "Bearhawk Makes DeltaHawk An Option". AVweb. Archived from the original on August 8, 2023. Retrieved August 8, 2023.
  8. ↑ Federal Aviation Administration (October 27, 2016). "Make / Model Inquiry Results" . Retrieved October 27, 2016.
  9. ↑ Transport Canada (October 27, 2016). "Canadian Civil Aircraft Register". Archived from the original on July 18, 2011. Retrieved October 27, 2016.
  10. ↑ "Bearhawk Announces The Bravo Model". AVweb. July 27, 2016. Retrieved August 2, 2016.
  11. ↑ Cook, Marc (August 26, 2019). "Bearhawk Introduces Side-By-Side Companion". AVweb. Retrieved August 28, 2019.
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