Bear Aircraft Bear 360
The Bear 360 is a new manufacture, all metal, high-performance, 360 HP radial M-14P powered, tandem seating, Warbird styled aircraft, created by the American-Russian design team that includes Russian aircraft designer, Sergey Yakovlev, and American combat fighter pilot and air racer, Skip Holm. Sergey Yakovlev developed the Bear 360 to military specifications, to meet FAR Part 23 requirements as well as full Russian Military Specifications.
The Bear 360 two place tandem seated cockpit has dual flight controls. Sold in the experimental category, the Bear 360 meets specifications for this type of FAA aircraft category and is a fully documented FAR Part 23 engineered aircraft.
The Bear 360 is powered by the Vedeneyev M-14P, 360 horsepower, supercharged, air-cooled, reciprocating nine-cylinder radial engine. The M-14P will maintain sea level power to 7,500 ft altitude. Engine controls are simplified through fuel scheduling hardware so that the pilot operates only the throttle and RPM controls. Engine starting is electric. Vedeneyev dictates the M-14P’s TBO in terms of cycles, which is a common practice in Russia and Eastern Block countries. In the West and Europe’s JAR it has certified the engine for a 1500 TBO. The Bear 360 has a three bladed hydraulically controlled constant speed MT Propeller certified to meet FAA specifications.
The Bear 360 wing has a NASA 63-215 root and 63-412-tip laminar flow airfoil. Lateral stability has been demonstrated in the full wind tunnel to 30 degrees angle of attack with flaps full up or full down. The wing is constructed around a single piece tapered main spar with stressed aluminum flush riveted skin over conventional stamped aluminum ribs. Wing dihedral is 5.0 degrees. Fuel is contained entirely in the wing structure and no bladders or individual tanks are used except the center sump tank, which feeds the engine (An auxiliary external centerline fuel tank is also available on all aircraft). The landing gear system attaches to the main spar and its surrounding structure. The wing is attached to the fuselage as a single piece structure and the four attach points are precision machined so there is no special rigging required for wing removal/replacement.
The Bear 360 flight control surfaces are all-metal construction and mass balanced. Flight control actuation is through torque and push - pull tube assemblies; no cables are used. Trim on all three axis is electric. Controlled with standard individual push-pull controls.
The Bear 360 fuselage is semi-monocoque, all metal, flush riveted construction. The cockpit width at the sliding rails is 25.5 inches. The windscreen is 3/8ths polycarbonate, and the canopy is a large unobstructed bubble that slides aft, operated by a hand crank. The canopy may be left partially open during start, taxi, takeoff/landing and pattern operating speeds.
The landing gear is conventional, retractable, including the tail wheel. The main gear track is 9.3 feet. The main gear struts are oleo-pneumatic accommodating 8.00X10 inch tires. The brakes are of US manufacture employing two actuation cylinders per brake rotor.
The tail wheel is steerable and pivots through 360 degrees for ground handling/towing. The landing gear retraction and extension is hydraulically operated. An electro-hydraulic pump of US manufacture provides hydraulic pressure. Emergency landing gear extension is by means of a pneumatic charged unlock of the over-center locking mechanism and blow down system. The landing gear system normal operating pressure is nominally 800 PSI. The Bear 360 electrical system is 28 volts and is charged by a 35 amp B&C Specialties SK35 engine driven alternator, and a 24 VDC battery.
The fuel system consists of three wing fuel reservoirs, an engine driven fuel pump, and an emergency electrical fuel boost pump. Wet wings accommodate 37 US gallons each and the sump/feeder tank in the bottom center of the wing holds the remaining 2 gallons of the fuel system, for a total of 76 gallons. For normal operations the fuel boost pump is not required as the engine driven mechanical fuel pump provides both the suction to pull fuel from the sump tank as well as pressure for normal fuel scheduling throughout the engine operating range. The fuel boost pump provides full normal engine operation for starting, takeoff and landing. Additionally, an optional removable 22 US gallon centerline mounted external tank, similar to a WWII drop tank design, is available for all aircraft. This external tank fuel is delivered via an electric fuel pump.
The flaps are electrically actuated, via an electric flap switch and can be manually stopped at any flap position. This 3-position flap switch commands flaps in these positions: flaps up, flaps stopped, or flaps lowering. An electrically actuated speed brake is mounted near the aerodynamic center of the aircraft between the flaps. The speed brake can be employed throughout the entire aircraft flight envelope with minimal change to steady state trim settings. The speed brake can also be employed as a flap for landing.
The cross country baggage compartment or equipment bay is 4.2 cubic feet and is designed to carry airline carry-on-baggage for both pilots. It will accommodate a maximum of 65 pounds.
The Bear 360 had over 1,000 hours of wind tunnel and load testing to destruction, and undergone extensive flight-testing to US military standards in the hands of test pilot Skip Holm, to be issued FAA approval.
The aircraft exhibits buffet 6 knots above the stall, and stalls at 81 KTS. The engineering estimation at stall altitude was 78 KTS at an empty weight of 1878 pounds plus fuel, whereas the prototype was 1901 empty plus fuel/PAX on board. The stall was straightforward, stalled with a mild buffet, and did not have any tendency to snap.
Four different configuration options were offered in 2015:
Ready to Fly (RTF)
Warbird Edition (2015: US$310,000)
Skip Holm Signature Series
Almost Ready to Fly (ARF) Does not include: Engine, propeller, avionics, interior or paint. Cockpit, engine, landing gear and wheel wells are painted in 5th generation fighter grey. 2015 US$185,000
The Skip Holm Signature series was the luxury variant of the Bear 360, including a choice of high-end avionics, autopilot, fully customized paint, plus well-appointed cabin amenities such as plush, hand-tooled, leather seating and panels, custom built by the Yakovlev factory.
The Almost Ready to Fly (ARF) Aircraft excludes Engine, Propeller, Avionics, Interior and Paint. If a buyer provided engine and propeller to the factory, these would be installed without charge.
The Bear was under production in Orenburg, Russia, in 2015.
Engine: Vedeneyev M-14P, 360 hp / 420 hp (optional)
Wingspan: 23.10 ft
Wing area: 93 sq ft
Length: 23.25 ft
Gross weight: 2760 lb
Empty weight: 1860 lb
Fuel capacity: 76 USgal
Wing loading (at gross): 29.7 lbs/sq ft
Vne: 280 kias
Max cruise (at Sea Level): 250 kias
75% cruise (at Sea Level): 210 kias
Stall (landing configurations) Vso: 70 kias
Stall (clean) Vsi: 78 kias
S L rate of climb: 1850 fpm
Max range @ SL (20 Min reserve): 890 nm
Take off roll at sea level (Std day): 825 ft
Take off roll over 50 Ft obstacle: 1050 ft
Landing at sea level (Std day): 825 ft
Landing over 50 Ft obstacle: 1100 ft
Max roll rate: 180 Degrees/Second
Max ‘G’: +6, -3
Fuel: 100 Low Lead Av Gas, 91 Octane with NO Ethanol