BRAND and MODEL
SEABIRD SB-4 And SB-5 SENTINEL
TYPE
Two-seat observation and training aircraft
ORIGIN
Australia
ENGINE
One 67 kw (90 hp) Norton Aerotor NR 642-GE-90 twin rotor rotary engine
SPECIFICATIONS
Wingspan: 10.60 m (34 ft 9¼ in)
Length: 6.70 m (21 ft 11¾ in)
Height: 1.83 m (6 ft 0 in)
Wing area: 12.77 m² (137.46 sq ft)
Never exceed speed: 235 km/h (146 mph)
Max speed at 1,525 m (5,000 ft): 193 km/h (120 mph)
Max cruising speed at 1,525 m (5,000 ft): 166 km/h (103 mph)
Cruising speed at 70% power: 157 km/h (98 mph)
Stalling speed flaps down: 71 km/h (44 mph)
Max rate of climb at sea level: 244 m/min (600 ft/min)
Service ceiling: 4,875 m (16,000 ft)
Take-off run: 92 m (300 ft)
Landing run: 92 m (300 ft)
Take-off to 15 m (50 ft): 305 m (1,000 ft)
Landing run from 15 m (50 ft): 365 m (1,200 ft)
Range with 45 mins reserve, standard fuel and max payload: 704 km (437 miles)
Range with max optional fuel: 1,480 km (920 miles)
G limits: +4.4 / -2.23 in utility category
Standard fuel capacity: 114 litres (25 Imp gals)
Optional fuel capacity: 200 litres (44 Imp gals)
Empty weight (prototype): 405 kg (893 lb)
Max take-off weight in utility role: 650 kg (1,433 lb)
Max loaded weight: 750 kg (1,653 lb)
