top of page

AW 250kW Wind Turbine - 30m rotor

250 Kilowatts of Power - Filling the Mid-Scale Gap 

For too long the wind industry has been looking for a turbine that produces much more than 100 kilowatts of power, without having to go to the size or expense of a 600 or 750 kilowatt machine. With the public now aware that wind power can be a viable source of electrical energy, customers want to know what it can do for their local factory, shopping center or school. The Aeronautica 225 series fills that need. 

The origin of this superb turbine goes back more than 25 years, with the first machines of this class installed in 1984. Over 87 turbines were installed across the world. 

At less than 180' tall on a 40m monopole tower (30m and 50m options also available), the 250 is a great stall-regulated wind turbine that will fit on many suburban, urban, and micro grid opportunities. It is able to be shipped in standard shipping containers, making delivery to most locations a breeze. Erection can be made by readily available smaller cranes that can be mobilized easily. Its simplicity of design has created both a robust and very cost effective turbine for commercial, industrial or municipal needs.

With its low profile and efficient output, the 250 is a great match for many distributed generation applications. And Aeronautica wind turbines are all manufactured in the United States, reducing shipping costs and delivery times.

AW 250 Power Curve

AW 250 Annual Power Output

AW 30-250 Specifications


3 blades, upwind orientation

Fiberglass reinforced polyester


Power regulation: Stall Regulated

Rotor size: 30m diameter (108')

Rotor speed: 40/24 rpm

nominal Swept area: 707m2

Tilt angle: 5o

Coning angle: 0o

Blades length: 13.4m

Tip speed: 54.4 m/s (141 mph) at full load

Pitch angle: Approx. 2.3o (adjusted during run-in)

Pitch bearings: 4-point ball bearings

Air brake, normal: Turnable Blade Tips

Air brake, emergency: Fail safe disc brake on high speed shaft

Mechanical brake: A fail-safe type disk brake

Brake torque: 2 times of nominal torque (1x by normal braking sequence)


Nominal Electric Power: 250/50kW

Generator: Closed, 4/6 or 6/8pole, asynchronous, single wound, induction, IP54

Generator speed: 1006/757 rpm (50 Hz) / 1207/908 rpm (60 Hz)

Loss in generator: Approx. 3% at full load

Generator cut-in: Thyristor controlled gradual cut-in

Grid connection: 400/480V

Frequency: 50 Hz/60 Hz

Connection Relay: SEL 547 Protective Relay (standard)


Yaw motors: 2 pcs. active drives, electrical

Yaw brakes: 3 pcs. active hydraulic brakes

Yaw bearing: Slide bearing

Cut-in wind speed: 3-4 m/s (7-9 mph), based on 10 min average

Cut-out wind speed: 25 m/s (56 mph), based on 5 min average

Survival Speed: 52.5 m/s (117 mph)

Controller: Mita-Teknik

Op. Temp. Range: -30oC to +55oC (Very Low Tempe and Very High Temp options available)

Noise: 98 dBA Sound Power (at Nacelle)

Monopole Tower

Conical Steel, White: 30, 40, and 50m hub heights

Nacelle Access: Interior tower ladder through locked door

Surface Treatment: In accordance with ISO 12944

Laser inspected flanges, ultrasonic inspection of raw materials/welds

Safety Features

Induction generator has inherent anti-islanding

Fail-safe hydraulic disk brake

Grid monitoring for shutdown and operational performance

Fall protection ladder system

Lightning protection

bottom of page