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International Ultralite Aviation Banchee


The International Ultralight Banchee (also called the Banshee) is an American ultralight aircraft designed by Brian Jensen, Gil Kinzie and Nick Nichols and produced by International Ultralight Aviation. The aircraft was supplied as a kit for amateur construction. Unit cost was US$5,495 ready-to-fly in 1982.

The aircraft closely resembles the Pterodactyl Ptraveler, and, like the Pterodactyl, was designed to comply with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of 254 lb (115 kg). The Banchee has a standard empty weight of 251 lb (114 kg). It features a cable-braced high-wing, single-seat, open cockpit, without pod, single pusher engine configuration, and is equipped with tricycle landing gear. Steel-spring suspension on nose-wheel and glass-fibre suspension on main wheels. Push-right go-left nosewheel steering independent from yaw control. No brakes.

The aircraft is made from bolted-together aluminum tubing, with the double-surface wing covered with Dacron sailcloth. Its 34 ft (10.4 m) span wing is cable-braced from an inverted "V" kingpost, has 4° of dihedral and 15° of leading edge sweepback, unswept trailing edge. The wing has a tapering chord, no tailplane, and canard wing. The three-axis control system is unconventional, with pitch controlled by an all-flying canard, yaw by wingtip rudders and roll by spoilerons, all actuated by a single side-stick, the aircraft lacking rudder pedals. The cockpit is an open sling seat without a windshield. The tricycle landing gear features suspension on all wheels. The Cuyuna 430R engine is mounted below wing behind the pilot and can produce 35 hp (26 kW) at 6250 rpm.

A ballistic parachute was available as an option, as was an electric starter; the company claimed that the Banchee could be rigged in 35 minutes.

Conceived by Brian Jen-sen and Gill Kinzie, the Banchee was shown publicly for the first time at Sun 'n' Fun in March 1983 at Lakeland, Florida. Just before this exhibi-tion, it took part in the Greater Arizona Ultralight Air Race, where two of the five Banchees entered finished 3rd and 4th in Class E, which was considered to be a convincing first public appearance.

On 21 May 1983 during a demonstration flight at St. George, Utah a Banchee suffered a cable swaging failure at an altitude of 50 to 60 ft (15 to 18 m) that resulted in one fatality. The US National Transportation Safety Board cited the probable causes as improper maintenance and quality assurance on the part of the manufacturer. The company went out of business shortly after the accident.

Engine Cuyuna ULII-02 engine.
Max power 35 hp / 26 kW at 6250 rpm.
Propeller: 2-bladed wooden
Propeller diameter and pitch 54 x 27 inch, 1.37x0.69m.
V-belt reduction, ratio 2.0/1.
Max static thrust 230 lb, 104kg.
Power per unit area 0.18 hp/sq.ft, 2.0 hp/sq.m.
Fuel capacity 5.0 US gal, 4.2 Imp gal, 18.9 litre.
Length overall: 12.0 ft, 3.65 m.
Height overall: 9.0 ft, 2.74m.
Wing span: 34.0 ft, 10.36m.
Chord at root 6.0 ft, 1.82m.
Chord at tip 4.0 ft, 1.22m.
Dihedral 4 deg
Sweepback 15 deg
Canard span 10.0ft, 3.04m.
Canard chord 2.0 ft, 0.61 m.
Total wing area 190 sq.ft, 17.7sq.m.
Main wing area 170 sq.ft, 15.8sq.m.
Canard area 20 sq.ft, 1.9 sq.m.
Total aileron or spoiler area 3.0 sq.ft, 0.28sq.m.
Rudder area 14.0 sq.ft, 1.30sq.m.
Main wing aspect ratio 6.8/1.
Nosewheel diameter overall 16 inch, 41 cm.
Main wheels diameter overall 16 inch, 41 cm.
Floats, dimensions 13 x 1.10 ft, 3.96 x 0.56 m.
Skis, dimensions 3 x 0.6ft, 0.91 x 0.15m.
Empty weight: 251 lb / 114 kg
Gross weight: 600 lb / 272 kg
Fuel capacity: 5 U.S. gallons / 19 lt / 4.2 imp gal
Payload 280 lb, 158
Max wing loading 3.15 lb/sq.ft, 15.4kg/sq.m.
Max power loading 17.1 lb/hp, 7.8kg/hp.
Load factors; +6.0, -3.0 ultimate.
Maximum level speed: 55 mph / 89 km/h / 48 kt
Never exceed speed: 65 mph / 56 kt / 105 km/h
Max Cruise speed: 50 mph / 43 kt / 80 km/h
Economic cruising speed: 35 mph, 56 kph.
Stalling speed: 24 mph / 21 kt / 39 km/h
Max climb rate at sea level 1000 ft/min, 5.1 m/s.
Min sink rate 350 ft/min at 30 mph, 1.7 m/s at 48 kph.
Best glide ratio with power off 12/1 at 38 mph, 61 kph.
Take-off distance 75 ft, 23 m.
Landing distance 50ft, 15 m.
Service ceiling 14,500ft, 4422 m.
Range at average cruising speed 120 mile, 193 km / 104 nmi
Crew: one



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