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Nogrady Avionette AN2


Designer Bela Nogrady started prototype 01 of the AN-2 in 1982 and it made its first flights in July 1982. The Avionnette had a conventional empennage at first, with quarter-span spoilers, after which a V-tail was tried with fully flying elevons. This butterfly tail configuration with 110 degrees between the two surfaces was adopted for prototype 02, which made its first flights at the end of April 1983, but the elevons are no longer fully flying, hingeing instead from inclined fixed surfaces, this tail being a NACA 0015 profile.

Production Avionnettes retain the constant chord wing without leading-edge sweepback, as used on the first prototype, but will be fitted with ailerons and flaps as tried on 02. With a total surface area of 15.1 sq.ft (1.40sq.m), these flaps have three positions: 15, 30 and 55 degrees. The wing tips now have semi-elliptic end plates and the profile used on 01, the Worthmann FX-S02-184, set at 6 degrees without washout and with 3 degrees of dihedral, has been replaced by an FX-66S-171, set at 6 degrees incidence with the same dihedral and still without washout.

Production was programmed to get up to six machines a month before the end of 1983. The AN-2 comes as standard with dual controls and a retractable main wheel with wheel-well door and drum brake; under development is a taildragger version with laminated carbon fibre main gear. The wings and tail surfaces are easily de-mountable and the AN-2 is trailer transportable.

The standard model comes with a three-blade propeller, ground adjustable for pitch.

Side-by-side two-seat single-engined mid-wing monoplane with conventional three-axis control. Wing has unswept leading and trailing edges, and constant chord; V-tail. Pitch/yaw control by elevon; roll control by one-third span ailerons; control inputs through stick for pitch/roll and pedals for yaw. Cantilever wing of Worthmann FX66-S-171 profile; double-surface. Undercarriage has two wheels in tandem with skid under each wing; rubber suspension on main wheel. Push-right go-right tailwheel steering connected to yaw control. Brake on main wheel. Glass-fibre fuselage totally enclosed. Engine mounted at wing height driving tractor propeller. Carbon-fibre wing spar with Kevlar, aluminium ribs, Dacron covering and plastic leading edge.

This microlight offers a maximum level speed of 106 mph (170 kph) take-off at 23mph (38kph) and cruise between 56 and 93 mph (90-150 kph) with 43 hp thrust and a gross weight of 662 lb (300 kg). The AN-2 could be mistaken for a modern motor glider, with its composite construction, glide ratio of 26.4/1 and aspect ratio of almost 12/1.

Engine: Hirth 2701R-53, 43 hp at 6750 rpm
Propeller diameter and pitch: 51 x 45 inch, 1.30 x 1.15 m
V-belt reduction ratio: 2.21
Power per unit area 0.28 hp/sq.ft, 3.0hp/sq.m
Fuel capacity 10.6 US gal, 8.8 Imp gal, 40.0 litre
Length overall 21.1 ft, 6.38 m
Height overall 5.1ft, 1.80m
Wing span 42.8ft, 13.00m
Constant chord 3.7 ft, 1.10m
Dihedral 3 degrees
Sweepback 0 degrees
Tailplane span 12.2 ft, 3.70 m
Total wing area 152 sq.ft, 14.1 sq.m
Total aileron area 8.6 sq.ft, 0.80sq.m
Tailplane area 22.8 sq.ft, 2.12 sq.m
Total elevon area 11.6 sq.ft, 1.08 sq.m
Wing aspect ratio 2.1/1
Wheelbase 16.1ft, 4.90m
Tailwheel diameter overall: 6 inch, 16 cm
Main wheels diameter overall 19 inch, 48 cm
Empty weight 2651b, 120kg
Max take-off weight 6621b, 300kg
Payload 397 lb, 180 kg
Max wing loading 4.351b/sq.ft, 21.3 kg/sq.m
Max power loading 15.41b/hp, 7.0kg/hp
Load factors; +8.0, -4.0 ultimate
Max level speed 106mph, 170kph
Never exceed speed 117mph, 189kph
Max cruising speed 93mph, 150kph
Economic cruising speed 56mph, 90kph
Stalling speed 23mph, 38 kph
Max climb rate at sea level: 600 ft/min, 3.1 m/s
Min sink rate 138ft/min at 30mph, 0.7 m/s at 48 kph
Best glide ratio with power off: 26.4/1 at 45 mph, 72 kph
Take-off distance 193 ft, 59m
Landing distance 213 ft, 65 m
Service ceiling 23,000ft, 7000m
Range at average cruising speed: 497 mile, 800km



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