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Northstar Viking


Single-seat single-engined biplane with two-axis control. Wings have swept back leading and trailing edges, and constant chord; no tail, canard wing. Pitch control by fully flying canard; yaw control by tip rudders between wings; no separate roll control; control inputs through stick for pitch and pedals for yaw. Wings braced by struts and transverse X -cables; wing profile; double-surface. Undercarriage has three wheels in tricycle formation; glass-fibre suspension on main wheels. Push-right go-left nosewheel steering independent from yaw control. Brake on nosewheel. Alu-minium-tube framework, without pod. Engine mounted between wings driving pusher propeller.

Shown at Sun 'n' Fun in March 1983 at Lakeland, Florida, the Viking is a variation on the famous Easy Riser theme Whereas UFM of Kentucky has fitted the Easy Riser with a conventional tail giving rise to the Aeroplane (a 1983 model), Northstar had preferred a canard of variable incidence, thus acting as an elevator, for its Viking.

Designed for cross-countries, it gives its pilot comfort and a large speed range. Its Kawasaki TA440 is equipped with an electric start, making it necessary to have a 12 V battery on board. The fuel tank is moulded into the seat back, whose structure is of glass-fibre, and other nice touches include a twin-blade ground-adjustable variable-pitch propeller and a rudder bar which is adjustable according to the height of the pilot. Northstar supplies its Viking in kit form requiring 75-100 h for assembly at an intro-ductory price (March 1983) of $5395. The kit does not require any special tools, assembly being largely with pop rivets.

Engine: Kawasaki TA440, 38.5hp at 6000rpm
Propeller 60 in / 1.52 m ground adjustable) inch
Micro V-belt reduction, ratio 2.25/1
Max static thrust 235 lb, 107 kg
Power per unit area 0.22 hp/sq.ft, 2.4 hp/sq.m
Fuel capacity 5.0 US gal, 4.2 Imp gal, 18.9 litre
Wing span 32.0 ft, 9.75 m
Total area of main wings 170 sq.ft, 15.8 sq.m
Nosewheel diameter overall 16 inch, 41 cm
Main wheels diameter overall 20 inch, 51 cm
Empty weight 244 lb, 11.1kg
Max take-off weight 502 lb, 228 kg
Payload 258 lb, 117 kg
Max wing loading 2.95 lb/sq.ft, 14.4 kg/sq.m
Max power loading 13.0 lb/hp, 5.9kg/hp
Load factors +5.0, -3.0 design
Max level speed 54 mph, 87 kph
Never exceed speed 55 mph, 88 kph
Max cruising speed 45 mph, 72 kph
Stalling speed 23 mph, 37 kph
Max climb rate at sea level 800 ft/min, 4.1 m/s
Best glide ratio with power off 7/1



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