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AK1-3 SANKA HELICOPTER SPECIFICATIONS Main rotor diameter 6.84 m (22ft 5.5) Number of rotor blades 3 composite material with -9.5 non liner twist Rotor head type Bearing-less design using laminated steel torsion bars Rotor tip speed 205 m/sec. (672 ft/sec) Blade chord 0.17 m (6.7) Blade profile NACA 63012/63015 Rectangular shape Disc area 36.745 m (399.48 ft) Tail rotor diameter 1.28 m (4 2.4) Blade number 2 Blade chord 0.115 m (4.5) Blade profile NACA 63012 Blade tip speed 186.3 m/s (611ft/sec) Engine type & make Piston, Fuel-injected, EJ-25 Subaru 2457cc Layout Flat-four cylinder OHC 4 valves per cylinder Engine power 121 kw (165 hp) Full power duty limitation Continuous General dimensions: Cabin width 1.353 m ( 4 5 1/4) Skid width 1.722 m (5 7.8) Total overall length 8.096 m (26 6.6) tip of front rotor to tip of tail rotor Top of cabin roof to ground 1.936 m (6 4.2) Height of rotor head above ground 2.270 m (7 5.4) Tail fin area 0.267 m Horizontal stabilizer area 0.15 m Gross weight (Passenger mode) 650 kg (1431 LB) Gross weight (Crop-spraying mode) 740 Kg (1630 LB) Empty weight (without cabin heater) 373 kg (821LB) Fuel tank capacity 75L (19.8 US gallons) (55 kg) Fuel type 95 octane unleaded petrol Useful load @ 650 kg gross weight 277 kg (610LB) Useful load @ 740 kg gross weight 367 kg (808 LB) Maximum level speed 650 kg @ SL 186 kmh (115mph) (100knts) Maximum level speed 740 kg @ SL 135 kmh (84 mph) (73 knots) Cruising speed 650 kg @ 75% power 157 kmh (97mph) (85knts) Vne 650 kg @ SL 190 kmh (118mph) (102knts) Vne @ SL (Doors removed) 170 kmh (105mph) (92knots) Max rate of climb at 650 kg gross @ SL 9 m/s (1770 ft/min) Max rate of climb at 740 kg gross @ SL 6 m/s (1180 ft/min) Max rate of climb at 650kg gross @ 3000m 3.5 m/s (680ft/min) Service ceiling @ 650 kg 3000 m (9,850 ft) Absolute ceiling @ 650 kg 5150 m (16,900 ft) Hover ceiling in-ground-effect @ 650kg 2320 m (7,610 ft) Hover ceiling out of effect @ 650kg ISA 1800 m (5,900 ft) Hover ceiling in-ground-effect @ 610kg 2800 m (9,250 ft) [2 X 90 kg persons + full fuel] Hover ceiling OGE @ 610kg ISA 2300 m (7,540ft) [2 X 90 kg persons + full fuel] Min rate of decent in autorotation @ 650kg 7.4 m/s (1450ft/min) @ 90kmh (55mph) Best glide angle and speed 1: 4.1 @ 130kmh (80mph) (70 knots) Max endurance @ 45 knots 3.2 hours Max range @ 65 knots (Best range speed) 350 km (217SM) Max range @ 85 knot cruise speed 320 km (200SM)