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Robin ATL


Robin began work on its Avion Tres Leger (very light aeroplane) in 1981 with the intention of producing a lightplane that would be cheap both to buy and to operate. The concept matured with a pod-and-boom fuselage whose wide side-by-side cockpit section tapers to a slim rear section terminating in a V-tail, fixed tricycle landing gear and a specially developed 35-kW (47-hp) Ateliers JPX air-cooled engine. Construction is mixed, the wings being of wood with fabric covering, the fuselage being a glassfibre/honeycomb/epoxy unit and the control surfaces are of Duralu-min AU4G. The integral polycarbonate canopy opens by tilting forward over the front section of the fuselage and is counterbalanced. The wing uses a modified NACA 43015 profile set at 3o incidence with a washout of -4 degrees; it has a coefficient of 0.5. Although with 0 o sweep back at the leading-edge, the wing has an inverse sweep of -3 degrees at the spar. Flaps totalling 10.4 sq.ft (0.97 sq.m) run the majority of the span and are independent of the ailerons. Operated by an electric motor, these flaps are controllable from the instrument panel and various angles can be selected between 0 and 60 degrees. The first example flew in June 1983, and testing led to certification to FAR Pt 22 standards. The French government ordered the type for government sponsored training schools, and production is also being undertaken for private operators. The definitive version is the ATL Club with a more powerful engine and a number operationally desirable refinements.

A side-by-side two-seat single-engined low-wing monoplane with conventional three-axis control. Wing has unswept leading edge, swept forward trailing edge and tapering chord; V-tail. Pitch/yaw control by elevons; roll control by half-span ailerons; control inputs through stick for pitch/roll and pedals for yaw. Cantilever wing; wing profile NACA 43015; double-surface. Undercarriage has three wheels in tricycle formation; bungee suspension on nosewheel and glass-fibre suspension on main wheels. Push-right go-right nosewheel steering connected to yaw control. Brakes on main wheels. Glass-fibre fuselage, totally enclosed. Engine mounted at wing height driving tractor propeller.

Length overall 22.1 ft, 6.75 m
Height overall 6.4ft, 1.95m
Wing span 32.8ft, 10.00m
Chord at root 4.9ft, 1.50m
Chord at tip 2.8ft, 0.80m
Dihedral: 6o
Sweepback: 0o
Tailplane span 9.5 ft, 2.87 m
Fin height 3.3 ft, 1.00 m
Total wing area 129 sq.ft, 12.0 sq.m
Total aileron area 10.4 sq.ft, 0.97 sq.m
Fin area 20.9 sq.ft, 1.94 sq.m
Total elevon area 5.2 sq.ft, 0.48 sq.m
Wing aspect ratio 8.3/1
Wheel track 9.7 ft, 2.92 m
Wheelbase 5.3 ft, 1.60 m
Nose-wheel diameter overall 11 inch, 27 cm
Main wheels diameter overall 13 inch, 33 cm

ATL Club 47
Engine: PAL 1300, 47 hp
Seats: 2
Empty wt: 200 kg
MAUW: 420 kg
Cruise: 100 kt
Ceiling: 13,000 ft
Endurance: 5 hr
Range: 500 mile

ATL Club
two-seat sport lightplane
Span: 10.25m (33ft 7.5 in)
Length: 6.70m (2lft 11.8in)
Powerplant: l x Ateliers JPX 4T-60A, 44.7kW (60 hp)
Max T/O weight: 580 kg (1,279 lb)
Max speed: 112 mph at sea level
Operational range: 714 miles



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