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Sukhoi S-986

Triton

Donald McKelvy
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Sukhoi S-986

Type: Twin-engined multipurpose light transport.

Program:
Design started 1993.

Design features: High-wing, podded fuselage; twin-boom configuration; winglets; inward-canted sweptback fins and rudders. Wing thickness/chord ratio 16 percent at root, 12 percent at tip; no dihedral.

Power plant: Two 265 kW (355 hp) VOKBM M-14P nine-cylinder radial engine; three-blade MTV-3-B/250-21 propellers. Fuel capacity 550 liters (145 US gallons; 121 Imp gallons). Oil capacity 30 liters ( 8 US gallons; 6.5 Imp gallons).

Accommodation: Two crew side by side; cabin will seat nine passengers or can be equipped for agriculture, forest patrol, and firefighting, or emergency rescue missions. Doors on each side of the flight deck and at rear of cabin on port side.

Dimensions external
Wing span: 16.00 m (52 ft 6 in)
Wing cord at root: 1.50 m (4 ft 11 in)
Wing cord at tip: 0.90 m (2 ft 11.5 in)
Length overall: 11.60 m (38 ft .75 in)
Fuselage length: 9.00 m (29 ft 6.5 in)
Fuselage depth: 1.80 m (10.75 in)
Fuselage width: 1.80 m (10.75 in)
Height overall: 4.00 m (13 ft 1.5 in)
Tailplane span: 4.60 m (15 ft 1 in)
Wheel track: 4.90 m (16 ft 1 in)
Wheelbase: 4.20 m (13 ft 9.5 in)
Propeller diameter: 2.50 m (8 ft 2.5 in)
Distance between propeller centers: 4.90 m (16 ft 1 in)
Cabin door height: 1.35 m (4 ft 5.75 in)
Cabin door width: 0.80 m (2ft 7.5 in)
Rear hatch depth: 1.00 m (3 ft 3.75 in)
Rear hatch width: 1.20 m (3 ft 11.25 in)
Emergency exit height: 0.915 m (3 ft 0 in)
Emergency exit width: 0.51 m (1 ft 8 in)

Dimensions internal
Cabin length: 5.90 m (19 ft 4.25 in)
Cabin max width and height: 1.68 m (5 ft 6 in)
Cabin floor area: 9.00 sq m (96.88 sq ft)
Cabin volume: 16.70 cu m (590.00 cu ft)

Areas
Wings gross: 21.20 sq m (228.20 sq ft)
Vertical tail surfaces (total): 5.60 sq m (60.28 sq ft)
Horizontal tail surfaces (total): 3.50 sq m (37.67 sq ft)

Weights and loadings

Weight empty: 2.300 kg (5,070 lb)
Max fuel: 550 kg (1,212 lb)
Max T-O weight: 4,000 kg (8,818 lb)
Max wing loading: 188.7 kg/sq m (38.64 sq ft)
Max power loading: 7.55 kg/kW (12.42 lb/hp)

Performance (estimated)
Never exceed speed: 242 kts (450 km/h; 280 mph)
Max level speed: 188 kts (350 km/h; 217 mph)
Econ cruising speed: 113 kts (210 km/h; 130 mph)
Max rate of climb at S/L: 420 m (1.375 ft)/min
Rate of climb at S/L, OEI: 90 m (295 ft)/min
Service ceiling: 4,000 m (13,125 ft)
T-O run: 625 m (2,050 ft)
T-O to 15 m (50 ft): 800 m (2.625 ft)
Landing from 15 m (50 ft): 525 m (1,725 ft)
Landing run: 350 m (1.150 ft)
Range with max fuel: 810 nm (1.500 km; 932 miles)

Text source: Jackson, Paul ed. Jane's All the World's Aircraft 1995-96 Jane's Information Group Ltd 1995 p. 394.

Three view drawing of Sukhoi S-986.

Image source: http://www.suchoj.com/galerie/index.htm
 

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