AVANTAGE A-31 SPECTRUM

TYPE: Agricultural sprayer.

PROGRAMME: Go-ahead for prototype issued 12 May 2004; prototype has flown. Aircraft designed to meet AP-23 airworthiness standard.

DESIGN FEATURES: Low-wing cantilever monoplane.

FLYING CONTROLS: Conventional and manual.

STRUCTURE: Composites fuselage; metal tube wing and tail, latter with glass fibre skin.

LANDING GEAR: Tailwheel type; fixed. Fuselage-mounted, spring cantilever mainwheel legs.

POWER PLANT: One 157 kW (210 hp) LOM Praha M337AK six-cylinder four-stroke engine driving a three-bladed Avia V-546 propeller.

ACCOMMODATION: Pilot only in ventilated cabin.

EQUIPMENT: Spraying equipment fitted on bar under wings; swath width 25 to 30 m (82 to 98 ft), coverage 150 ha (371 acres) per hour.

DIMENSIONS, EXTERNAL:

  • Wing span: 13.60 m (44 ft 7½ in)
  • Wing aspect ratio: 8.9
  • Length overall: 7.91 m (25 ft 11½ in)
  • Height overall: 2.66 m (8 ft 8¾ in)
  • Wheel track: 2.50 m (8 ft 2½ in)
  • Wheelbase: 4.90 m (16 ft 1 in)

AREAS:

  • Wings, gross: 20.88 m² (224.75 sq ft)

WEIGHTS AND LOADING:

  • Weight empty: 820 kg (1.808 lb)
  • Max payload: 364 kg (802 lb)
  • Max T-O weight: 1,350 kg (2.976 lb)
  • Max wing loading: 64.7 kg/m² (13.24 lb/sq ft)
  • Max power loading: 8.60 kg/kW (14.13 lb/hp)

PERFORMANCE:

  • Never exceed speed (VNE): 135 kt (250 km/h; 155 mph)
  • Max operating speed: 125 kt (232 km/h; 144 mph)
  • Normal cruising speed: 108 kt (200 km/h; 124 mph)
  • Spraying speed: 70-81 kt (130-150 km/h; 81-93 mph)
  • Stalling speed, power off: flaps up: 53 kt (97 km/h; 61 mph)
    • flaps down: 42 kt (77 km/h; 48 mph)
  • Max rate of climb at S/L: 312 m (1,024 ft)/min
  • Service ceiling: 4,400 m (14,435 ft)
  • T-O run: 84 m (276 ft)
  • Landing run: 114 m (374 ft)
  • Range: 302 n miles (560 km; 348 miles)