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Neukom AN-21 / AN-21R


Single-seat single-engined high-wing monoplane with conventional three-axis control. Wing has swept forward leading and trailing edges, and tapering chord; no tail, canard wing. Pitch control by elevator on canard; yaw control by tip rudders; roll control by one-third-span ailerons; control inputs through stick for pitch/roll and pedals for yaw. Wing braced from below by struts; wing profile Wortmann FX63-137; double-surface. Under-carriage has three wheels in tricycle formation; no suspension on nosewheel and glass-fibre suspension on main wheels. Push-right go-right nosewheel steering connected to yaw control. Brakes on nosewheel. Aluminium-tube/fabric fuselage, totally enclosed. Engine mounted at wing height driving pusher propeller.


1980 Wasserkuppe, piloted by Klaus Richter


As Albert Neukorn comfirmed, this machine was never intended for production. In fact, he wanted to design a single-seater canard aircraft, as much to try out this formula as for his own pleasure. Of hybrid technology (Duralumin tubular structure with composite materials for the wing, the canard and rudders), the prototype made its first flights in 1980 and remains unique, with no direct descendants. It was originally called the AN-21. Later it was sold to a German purchaser, Klaus Jurgen Richter, who flew it in the London to Paris in September 1982, and so the aircraft is now called the AN-21R, this last letter referring to Mr Richter himself.


1980 Wasserkuppe, piloted by Klaus Richter

Length overall 16.1 ft, 4.90 m
Height overall 7.9 ft, 2.40 m
Wing span 41.3 ft, 12.60 m
Mean chord 2.8 ft, 0.85 m
Canard span 9.8 ft, 3.00m
Canard chord 1.7ft, 0.53m
Total wing area 132 sq.ft, 12.3 sq.m
Main wing area 115sq.ft, 10.7 sq.m
Canard area 17 sq.ft, 1.61sq.m
Main wing aspect ratio 14.8/1
Engine: Konig SC430, 25 hp at 4200 rpm
Power per unit area 0.19 hp/sq.ft, 2.0 hp/sq.m
Max level speed 81 mph, 130kph
Stalling speed 26mph, 42 kph
Max climb rate at sea level 500 ft/min, 2.5 m/s



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