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3.4.3. Rotation speed around vertical axis during hovering  < 45 degrees/s
3.4.4. Static ceiling for hovering       1500 m
3.4.5. Maximum ground climbing capacity     8 m/s
3.4.6. Minimal vertical descent rate while floating in              autorotation regime at VDesc=90 km/h     7,4 m/s
3.4.7. Flight duration at Н=0 - 500 m with 5 % necessary fuel supply 3 hrs
3.4.8. Practical ground range ability with 5 % necessary fuel supply 450 km
3.4.9.   Maximum exploitation load range                                                    +0.5…+2.5
 
 
 
 
 
 
3.5. GEOMETRICAL DIMENSIONS
 3.5.1. Tail unit
 Keel area        0.267 m2
 Stabilizer area        0.15 m2
3.5.2. Cockpit
 Internal dimensions:
  - length       1.5 m
 - width        1.4 m
  - height       1.2 m
 Entrance door        0.95х1 m
3.5.3. Undercarriage
  - length       1.8 m
- distance between skids     1.6 m
 
3.6. ENGINE INFORMATION
 3.6.1. Engine quantity, type, and marking:
 one horizontal piston four-cylinder four-act liquid-cooled engine Subaru EJ-25.
3.6.2. General characteristics of Subaru EJ-25:
 Engine working volume      2500 cm3
 Engine power        165 horsepower                                                                                     (121 kW)
 Engine dry weight       110 kg
 Overall dimensions of the engine:
  - length       0.8 m
  - height       0.7 m
  - width        0.5 m
3.6.3. Subaru EJ-25 operating limitations:
 Continuous working time in regime - unlimited
3.6.4. Engine mounting units:
  - three shock-absorbing pads, of which two are                on the engine mounting, and one near the flywheel.
 
 3.7. GEOMETRICAL ADJECTIVES OF THE ROTORS
 3.7.1. Geometrical adjectives of the rotor 
 - rotor diameter       6.84 m
 - blade number       3
 - carrier blade chord       0.17 m
 - blade profile        NACA 63012/63015
 - outline blade shape        rectangular
 - peripheral velocity of blade tip     205 m/s
 - duty factor        0.0475
3.7.2. Geometrical adjectives of the anti-torque rotor
- rotor diameter       1.28 m
 - blade number       2
 - carrier blade chord       0.115 mm
 - blade profile        NACA 63012
 - peripheral velocity of blade tip      186.3 m/s
 - duty factor        0.1144
 
 
3.8. ALTITUDE RANGES, OPERATING TEMPERATURE RANGES, AND WEATHER CONDITIONS 
3.8.1. Temperature range:       –30…+30°С
3.8.2. Altitude range (limited by the absence of oxygen equipment) 0…3000 m
3.8.3. The helicopter is designated for use under normal weather conditions in daylight according to visual flight rules in any latitudes.

  
3.9. LIFETIME
　
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本文鏈接地址：Ultra light Helicopter AK1-3(3)