HIGH PERFORMANCE TT62 ALEKTO

TYPE: Business twin-prop.

PROGRAMME: Promotion begun at ILA Berlin, 6 May 2002. First flight targeted for 2004, with JAR 23 IFR certification and first customer deliveries in 2005.

CURRENT VERSIONS: Initial version as described. Projected developments include an air ambulance and aerial surveillance variant, a stretched six/seven-seat variant with uprated engines, and a shortened, four-seat single-engine derivative, all having the same basic airframe.

COSTS: €450,000 plus tax (2002).

DESIGN FEATURES: Design aims include speed and economy, achieved in part by internal mounting of engines for reduced frontal area and use of diesel power. Consumption 79 litres (20.9 US gallons; 17.4 Imp gallons)/h at normal cruise; 58 litres (15.3 US gallons; 12.8 Imp gallons)/h at econ cruise. Specific range, respectively, 3.84 n miles/kg and 4.80 n miles/kg. Mid-mounted wing. T tail. Two internal turbo-diesel engines connected by tubular drive-shafts to propellers mounted on upward-canted pylons at fuselage shoulders behind wing trailing-edge.
Wing section NASA LS(1)-0413, dihedral 4° 30', incidence 1°, sweepback at leading-edge 12°. Tail section LWK 80-120/K25, no dihedral.

FLYING CONTROLS: Conventional and manual with sidesticks. Hydraulically actuated ailerons, elevator and rudder; electrically actuated single-slotted Fowler flaps; electric trim.

STRUCTURE: Composites carbon fibre sandwich throughout. Wing has two spars and four ribs; fuselage has two bulkheads and one frame; two-spar tailplane; single-spar fin.

LANDING GEAR: Retractable tricycle type, electrohydraulically actuated. Single wheel on each trailing-link main unit, twin nosewheels. Main units of aluminium 7075 and 1.4548, retracting inward into wings; nosewheels retract forward. Mainwheels Goodyear 6.50-8. SICOM carbon brakes.

POWER PLANT: Two 228 kW (306 hp) TAE Centurion 4.0 V-8 turbocharged diesel engines, each driving an MT-Propeller MTV-25-1-DCF/CF175-512 five-blade constant-speed fully feathering propeller. Fuel capacity 617 litres (163 US gallons; 136 Imp gallons).

ACCOMMODATION: Pilot and four passengers in two-one-two configuration (centre seat rearward-facing) in pressurised cabin with baggage space behind seats; differential 0.37 bar (5.5 lb sq/in); door forward of wing on port side;emergency exit on starboard side; two cabin windows each side.

SYSTEMS: Hydraulic and electrical systems; liquid de-icing system standard.

AVIONICS: IFR fit, with three-screen EFIS comprising one each PFD, MFD and EICAS.

DIMENSIONS, EXTERNAL:

  • Wing span: 11.24 m (36 ft 10½ in)
  • Wing chord: at root: 1.75 m (5 ft 9 in)
    • at tip: 0.80 m (2 ft 7½ in)
  • Wing aspect ratio: 9.0
  • Length overall: 11.52 m (37 ft 9½ in)
  • Fuselage: Length: 10.50 m (34 ft 5¼ in)
  • Max diameter: 1.55 m (5 ft 1 in)
  • Height overall: 3.71 m (12 ft 2 in)
  • Tailplane span: 4.46 m (14 ft 7½ in)
  • Propeller diameter: 1.75 m (5 ft 9 in)
  • Cabin door: Max width: 0.85 m (2 ft 9½ in)

DIMENSIONS, INTERNAL:

  • Cabin (between pressure bulkheads):
    • Length: 4.80 m (15 ft 9 in)
    • Max width: 1.40 m (4 ft 7¼ in)

AREAS:

  • Wings, gross: 14.03 m² (151.0 sq ft)
  • Ailerons (total): 0.67 m² (7.21 sq ft)
  • Flaps (total): 2.16 m² (23.25 sq ft)
  • Fin: 2.40 m² (25.83 sq ft)
  • Rudder: 0.60 m² (6.46 sq ft)
  • Tailplane: 2.66 m² (28.63 sq ft)
  • Elevators (total): 1.14 m² (12.27 sq ft)

WEIGHTS AND LOADINGS:

  • Weight empty: 1,780 kg (3,924 lb)
  • Max fuel weight: 500 kg (1,102 lb)
  • Max T-O weight: 2,550 kg (5,621 lb)
  • Max wing loading: 181.8 kg/m² (37.23 lb/sq ft)
  • Max power loading: 5.59 kg/kW (9.19 lb/hp)

PERFORMANCE (estimated):

  • Max level speed: 250 kt (463 km/h; 288 mph)
  • Normal cruising speed at FL200: 240 kt (444 km/h; 276 mph)
  • Long-range cruising speed at FL250: 180 kt (333 km/h; 207 mph)
  • Max rate of climb at S/L: 549 m (1,800 ft)/min
  • Time to FL250: 18 min
  • Range, 45 min reserves:
    • with max payload:
    •    normal cruise: 756 n miles (1,400 km; 870 miles)
    •    long-range cruise: 810 n miles (1,500 km; 932 miles)
    • with max fuel:
    •    normal cruise: 918 n miles (1,700 km; 1,056 miles)
    •    long-range cruise: 972 n miles (1,800 km; 1,118 miles)

The article appears in the following publication:
Jane's All the World's Aircraft 2004-2005. Jane's Information Group Ltd. 2004. ISBN: 0-7106-2614-2

***