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Swept propeller Scimitar propeller on a 1926 Alexander Eaglerock Eight-blade scimitar propellers on the Airbus A400M Atlas. A scimitar propeller is a type of propeller that has curved blades with increasing sweep along the leading edge. Their name is derived from their visual similarity to the curved blades of scimitars.
The blades of a Darrieus turbine can be canted into a helix, e.g. three blades and a helical twist of 60 degrees. The original designer of the helical turbine is Ulrich Stampa (Germany patent DE2948060A1, 1979). A. Gorlov proposed a similar design in 1995 (Gorlov's water turbines). Since the wind pulls each blade around on both the windward and ...
An example of a wind turbine, this 3 bladed turbine is the classic design of modern wind turbines Wind turbine components : 1-Foundation, 2-Connection to the electric grid, 3-Tower, 4-Access ladder, 5-Wind orientation control (Yaw control), 6-Nacelle, 7-Generator, 8-Anemometer, 9-Electric or Mechanical Brake, 10-Gearbox, 11-Rotor blade, 12-Blade pitch control, 13-Rotor hub
The world's tallest vertical-axis wind turbine, in Cap-Chat, Quebec Vortexis schematic Vertical axis wind turbine offshore. A vertical-axis wind turbine (VAWT) is a type of wind turbine where the main rotor shaft is set transverse to the wind while the main components are located at the base of the turbine.
Impulse turbines change the velocity of a water jet. The jet pushes on the turbine's curved blades which changes the direction of the flow. The resulting change in momentum causes a force on the turbine blades. Since the turbine is spinning, the force acts through a distance (work) and the diverted water flow is left with diminished energy.
Radial tipped – These fans have wheels that are backward curved, but in a way slightly different from backward curved fans. Backward curved fans have wheels whose blades curve outward, while radial-tip fans' blades are curved inward and radial at their tips (hence the name "radial tip"), while still in a backwardly-curved configuration.
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Known in Malay as a dap, it consists of a wooden shaft with a curved blade fashioned onto the end, and is similar in design to the Korean woldo. Usually, it also had a hook (ขอ) between the blade and shaft used for commanding the elephant. The elephant warrior used the ngao like a blade from atop an elephant or horse during battle.