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Abstract image of the rotating wheel - motion blurred
Lisbon, Portugal: Ram Air Turbine (RAT)  is a small propellor that will deploy in a serious emergency to supply emergency backup electrical power to the aircraft. Usually this happens after all main engines and the APU (auxiliary power unit) fail. Behind the two-blade propeller a hydraulic pump can be seen, besides power, the RAT provides emergency hydraulic pressure. The RAT generates power from the airstream by ram pressure due to the speed of the aircraft. It may be also called an air driven generator (ADG) -
kaplan turbine a rotary mechanical device for the generation of energy and power
An abstract of a vintage airplane with propellors.
Ship's bronze propeller, close-up. Ship propeller blades.
The engine and propeller of a marine reconnaissance aircraft. Designed in 1954 and in service from 1957 to 1981 this plane was the largest aircraft built in Canada when it was introduced.
Photo taken in Gdansk, Poland
View on Gigantic blade of wind turbine over land in Sweden from wind turbine hub (roof). Dramatic sky and wind farm on the horizont.
Wind Turbine Blade tip seen  close up, against a blue sky
Front view of car tire rotating in wet conditions while in danger of hydroplaning
Refueling aircraft process at the airport, close-up
A futuristic spaceship that takes off from a field with antigravity technology. / You can see the animation movie of this image from my iStock video portfolio. Video number: 1455063643
Aircraft flying over a light pole
City’s water reservoir dam gates are open just enough to control the reservoir’s water level and maintain a nice continuous river flow
Underside of a  jet airplane wing.
Aerial view of a flower-shaped fountain
The water overflows the circular reservoir dam
Agricultural aircraft of the future. Remote control unnamed field drone.
Utility Inspection and Planning Personnel Waterworks and Irrigation Utilities Equipment Materials and Workers Large Volume Water Transfer Pipes Matching 4K Video Available (Shot with Canon 5DS 50.6mp photos professionally retouched - Lightroom / Photoshop - original size 5792 x 8688 downsampled as needed for clarity and select focus used for dramatic effect)
Dam with movable bulkheads on the Brembo river
Rope access technician doing inspection of blade on wind turbine high up with beautiful clouds behind
Turbine water treatment, Fill oxygen into water in lake
Close-up of snow on new car tyre against black background.
water release from turbines of hydro electric power plant
Low angle view of water spilling over small weir in rural Victoria
Stick in water fall
Sailboat propellers closeup
Huge funnel on the lake San Roque of Argentina
Underbelly of a  jet airplane.
Free Images: "bestof:Plane 9W Turbine.jpg en The water powered scotch turbine at Inclined Plane 9 West Water flowing dropping 50' through a 5' wide penstock pipe would spin the"
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