Bearhawk 5
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The Bearhawk 5 is a five-to-six seat
American American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, pe ...
amateur-built aircraft Homebuilt aircraft, also known as amateur-built aircraft or kit planes, are constructed by persons for whom this is not a professional activity. These aircraft may be constructed from "scratch", from plans, or from assembly kits.Armstrong, Kenn ...
, designed by Bob Barrows and under development by Bearhawk Aircraft. The aircraft is supplied as a kit for amateur construction.


Development

The design was initiated at the request of a friend of Bob Barrows, who was looking for a Barrows Bearhawk, 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
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, who was looking for a new building project, after having built several Bearhawk designs in the past. Campbell agreed to complete the
prototype A prototype is an early sample, model, or release of a product built to test a concept or process. It is a term used in a variety of contexts, including semantics, design, electronics, and Software prototyping, software programming. A prototyp ...
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 Barrows Bearhawk, the new design is wider, with a cabin longer and an overall length longer. The stretched cabin permits the installation of a fifth and sixth seat or additional baggage. The aircraft features a
strut-braced In aeronautics, bracing comprises additional structural members which stiffen the functional airframe to give it rigidity and strength under load. Bracing may be applied both internally and externally, and may take the form of strut, which act in ...
high-wing A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes. A monoplane has inherently the highest efficiency and lowest drag of any wing confi ...
, a five or six seat enclosed cabin accessed by doors that is wide, fixed
conventional landing gear Conventional landing gear, or tailwheel-type landing gear, is an aircraft undercarriage consisting of two main wheels forward of the center of gravity and a small wheel or skid to support the tail.Crane, Dale: ''Dictionary of Aeronautical Term ...
and a single engine in
tractor configuration In aviation, the term tractor configuration refers to an aircraft constructed in the standard configuration with its engine mounted with the propeller in front of it so that the aircraft is "pulled" through the air. Oppositely, the pusher c ...
. The aircraft
fuselage The fuselage (; from the French ''fuselé'' "spindle-shaped") is an aircraft's main body section. It holds crew, passengers, or cargo. In single-engine aircraft, it will usually contain an engine as well, although in some amphibious aircraft t ...
is made from welded steel tubing covered in doped
aircraft fabric Aircraft fabric covering is a term used for both the material used and the process of covering aircraft open structures. It is also used for reinforcing closed plywood structures. The de Havilland Mosquito is an example of this technique, as are ...
, with the wings of
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construction. The wings are identical to the original Bearhawk design. Its span wing employs a Riblett
airfoil An airfoil (American English) or aerofoil (British English) is the cross-sectional shape of an object whose motion through a gas is capable of generating significant lift, such as a wing, a sail, or the blades of propeller, rotor, or turbine. ...
, has an area of and mounts flaps. The aircraft's recommended engine power range is and standard engines used include the
Lycoming O-540 The Lycoming O-540 is a family of air-cooled six-cylinder, horizontally opposed fixed-wing aircraft and helicopter engines of displacement, manufactured by Lycoming Engines. The engine is a six-cylinder version of the four-cylinder Lycoming ...
, although the recommended engine is the
Lycoming IO-580 The Lycoming IO-580 engine is a horizontally opposed, six-cylinder aircraft engine featuring three cylinders per side, manufactured by Lycoming Engines. There is no carburetted version of the engine, which would have been designated O-580 and ...
four-stroke A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directio ...
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

By December 2020 one example, the prototype, had been registered in the United States with the
Federal Aviation Administration The Federal Aviation Administration (FAA) is the largest transportation agency of the U.S. government and regulates all aspects of civil aviation in the country as well as over surrounding international waters. Its powers include air traffic m ...
. 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."


Specifications


References


External links

* {{Bob Barrows aircraft Homebuilt aircraft Single-engined tractor aircraft 2020s United States sport aircraft 2020s United States civil utility aircraft