helicopter rotor blade
11Blade element theory — (BET) is a mathematical process originally designed by William Froude (1878), David W. Taylor (1893) and Stefan Drzewiecki to determine the behavior of propellers. It involves breaking an airfoil down into several small parts then determining the …
12Blade Inspection Method — is, according to the Sikorsky S 61 maintenance manual, a system of using an indicator and inert gas to detect cracks in the spar of a main rotor blade of some helicopters produced by Sikorsky …
13Helicopter — For other uses, see Helicopter (disambiguation). Helicopter An LAPD Bell 206 …
14helicopter — /hel i kop teuhr, hee li /, n. 1. any of a class of heavier than air craft that are lifted and sustained in the air horizontally by rotating wings or blades turning on vertical axes through power supplied by an engine. v.i. 2. to fly in a… …
15blade area — The total area of all rotor blades in a helicopter rotor system. Blade area is a constant value for each helicopter. Blade angle = area of blades A, B, and C …
16rotor — ro|tor [ˈrəutə US ˈroutər] n technical ↑rotor blade [Date: 1800 1900; Origin: rotator something that rotates (17 21 centuries), from Latin, from rotare; ROTATE] 1.) a part of a machine that turns around on a central point 2.) also rotor blade the …
17blade stall — As it refers to rotorcraft, it is the condition of the retreating rotor blade when in forward flight and when operating at an angle of attack greater than the maximum angle of lift. This occurs at high forward speeds and when settling with power …
18blade track — The condition of a propeller or helicopter rotor in which each blade follows in exactly the same path as the blade ahead of it. A blade is said to be in, or out of, track …
19blade — i. A rotating airfoil driven by a helicopter engine to produce vertical lift. Also called a rotor blade. ii. A rotating airfoil driven by an aircraft engine to produce a thrust force approximately in line with the longitudinal axis of the… …
20blade grips — That part of a helicopter rotor hub into which the blades are attached by a lead lag hinge pin. Blade grips also called blade forks …
