1 / 4

Coning

Coning. As the helicopter develops lift during takeoff and flight, the the blade tips rise above the straight-out position and assume a coned position. Primary forces involved:. Centrifugal Force: T he force which tends to make rotating bodies move away from the center of rotation

benjamin
Download Presentation

Coning

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Coning As the helicopter develops lift during takeoff and flight, the the blade tips rise above the straight-out position and assume a coned position. Primary forces involved: Centrifugal Force: The force which tends to make rotating bodies move away from the center of rotation Centrifugal force adds rigidity to the rotor blade, causing it to assume a straight-out position Lift: As the collective is increased and lift develops, the blades respond by rising above the straight-out position

  2. Centrifugal Force Coning Resultant: The combined effects of centrifugal force and lift cause the blades to assume a coned position. The angle between the straight-out position and the path flown by the blades is the coning angle. Some amount of coning is normal, however, excessive coning can create problems Resultant Lift

  3. Causes of excessive coning • Low rotor RPM = Loss of centrifugal force • High gross weight = More lift required • High “G” maneuvers = More lift required • Turbulence = Updrafts increase angle of attack, which increases coefficient of lift which increases lift

  4. Centrifugal Force Effects of excessive coning • Decreased rotor area and useful lift • Stress on blades and blade roots Resultant or effective lifting area Lift

More Related