AK-1  Mk3 Specifications

Main rotor diameter

Number of rotor blades

Rotor head type

Rotor tip speed

Blade chord

Blade profile

Disc area

              

Tail rotor diameter

Blade number

Blade chord

Blade profile

Blade tip speed

              

Engine type & make

Layout  Flat-four cylinder

Engine power

Full power duty limitation

              

General dimensions:

Cabin width

Skid width

Total overall length

Top of cabin roof to ground

Height of rotor head above ground

Tail fin area

Horizontal stabilizer area

              

Gross weight    (Passenger mode)

Dry weight

Empty weight (Oils, coolant, reserve fuel)

Fuel tank capacity

 

Fuel type

 

Useful load @ 650 kg gross weight

Maximum level speed 650 kg @ SL

Cruising speed 650 kg @ 75% power

Vne 650 kg @ SL

Vne @ SL (Doors removed)

Max rate of climb at 630 kg @ SL

Service ceiling @ 650 kg

 

 

6.84 m (22ft 5.5”)

3 – composite material with -9.5° non liner twist

Bearing-less design using laminated steel torsion bars

205 m/sec.  (672 ft/sec)

0.17 m (6.7”)

NACA 63012/63015 Rectangular shape

36.745 mІ (399.48 ftІ)

 

1.28 m (4’ 2.4”)

2

0.115 m (4.5”)

NACA 63012

186.3 m/s (611ft/sec)

              

Piston, Fuel-injected,   EJ-25 Subaru 2457cc

OHC 4 valves per cylinder

115kw (156 hp)

Continuous

              

All bolts sizes on airframe and engine are metric

1.353 m ( 4’ 5 1/4”)

1.722 m (5’ 7.8”)

8.096 m (26’ 6.6”)  tip of front rotor to tip of tail rotor

1.936 m (6’  4.2”)

2.270 m (7’ 5.4”)

0.267 mІ

0.15 mІ

              

650 kg (1431 LB)

395 kg (869LB)

410 kg (902LB)

 

72L (19.1 US gallons)  (53 kg)

95 octane unleaded petrol

240 kg (528 LB)

180 kmh (112mph) (97knts)

157 kmh (97mph) (85knts)

180 kmh (112mph) (97knts)

150 kmh (93mph) (81knots)

9 m/s  (1770 ft/min)

3000 m (9,850 ft)

 

Hover ceiling in-ground-effect @ 650kg

Hover ceiling out of ground effect @ 650kg

Min rate of decent in autorotation @ 650kg

Max endurance @ 45 knots

Max range @ 65 knots (Best range speed)

Max range @ 85 knot cruise speed

 

 

CROP SPRAY VERSION       

 

Gross weight 

Useful load @ 740 kg gross weight 

Maximum level speed 740 kg @ SL

2200 m (7,000 ft)

1550 m (5,100 ft)

9 m/s (1800ft/min) @ 85kmh (53mph) (46 knts)

3.2 hours

350 km (200 SM)

270 km (160 SM)

 

 

 

740 Kg (1630 LB)

367 kg (808 LB)

135 kmh (84 mph) (73 knots)