Aviatika-MAI-205 light agricultural autogiro by OSKBES MAI

General Information
Type MAI-205
Function Crop duster
Year 2001
Crew 1
Powerplant
Type Rotax-914ULS
Takeoff Power 115hp
Nominal Power 100hp
Size (m)
Length (w/o main rotor) 5.32
Length (with main rotor) 9.0
Height 2.87
Main rotor diameter 9.0
Rotor area 63.6m2
Filling 0.0453
Weights (kg) and loads
Empty 370 (with chemical gear)
Loaded 410 (no chemical gear) 530 (maximum)
Rotor Load (kg/m2) 6.44 8.33
Power load (kg/hp) 4.1 5.3
Speed (km/h)
Cruising, at 0m 44 30
Boosted, at 0m 145 115
Optimal for climb 90
Technical limit 160
Takeoff (no jump) 60 66
Takeoff (with jump) 12 8
Landing (with roll) 35 40
Landing (no roll) 5 10
Maneuverability
Turn radius 30m
g-Loads +3.5/-0.5
Roll (m)
Takeoff (no jump) 50 100
Landing (with roll) 35 40
Landing (no roll) 5 10
Range km
Without dusting gear 185 n/a
Ceiling (m)
Practical 4250 1750
Climb (m/sec)
at 0m 5.1 2.7
Payload
Fuel 30l, 22kg
Chemicals - 100l, 70kg
other
Estimated cost US$40,000

MAI-205 during Winter 2000/2001 ground trials
(OSKBES MAI)

The "205" is an very light jumping autogiro for non-aerobatic flights (training etc). Design program started in 1997, Construction of prototype began at the MAI Experimental-Trial Plant in 1998. Preliminary trials began in 2000, and first flight took place on April 26, 2001. MAI-205 was ordered and financed by undisclosed client from former Soviet republic Moldova.

MAI-205 construction is based on the MAI-890 ultralight. On the early design stages the autogiro was even considered as a field conversion of the biplane aircraft. But finally, only few parts (tail and nosewheel) remained unchanged. MAI-205 fuselage is made of aluminum alloy tubes. Enclosed fiberglass pilot's cabin has two side doors and extensive glazing. Back of the cabin is covered with noise-absorbing material. Wire-and-strut braced tailplane and rudder are of conventional type, covered with fabric.


MAI-205, April 26 2001. Ready for takeoff.
(OSKBES MAI)

Tricycle landing gear uses titanium alloy springs, all three wheels have 300x125mm pneumatics. Main gear has hydraulically activated brakes. Nosewheel is steerable, linked directly to rudder pedals. Controls (rudder, elevator, main rotor) are reversible, combination of rods and wires.


MAI-205, April 26 2001. Airborne!
(OSKBES MAI)

Vertical (jumping) takeoff is provided by pre-start acceleration of the main rotor. Switchable transmission boosts the rate to 40% above the cruising. When pilot pushes the "Jump" button, main rotor pitch automatically increases to 10°. For 2...3sec kinetic energy of the rotor provides sufficient lift for takeoff and acceleration (by the propulsion propeller). After takeoff, main rotor pitch returns to normal 4°, and aircraft goes into conventional autogiro climb.

Flight indicators include speed gauge, compass, altimeter, slide indicator, electronic engine control unit "FLYdat" and main rotor rate indicator.


MAI-205 3-view
(OSKBES MAI)

Special snap-on crop dusting kit is developed for this autogiro. This equipment is also created at MAI and is a second model, improved version of one installed on the MAI-890SKh. Two conformal chemical tanks are visible right behind the cabin, under the engine. They are equipped by electric pump, which is also serves for non-stop mixing of the chemicals and on-the-ground tank cleaning. Dispensers are airflow driven. Control unit in the cockpit has a digital indicator of the chemicals

Rotax-914ULS (Austria) is a piston liquid-cooling opposite type 4-cylinder 4-stroke turbocharged carburetor engine.

PredecessorsModifications

MAI-890
None
References
  • ...
  • Links
  • Автожир 205
  • Автожир 205
  • Летные испытания опытного образца сельскохозяйственного автожира МАИ-205
  • Новая разработка МАИ проходит летные испытания
  • Новая разработка МАИ проходит летные испытания

  • Modified November 4, 2001 Back to
    Main Gate