lead-lag motion

lead-lag motion
An angular oscillation of a rotor blade in the plane of rotation about a substantially vertical axis. The fore-and-aft movement of the tip of a helicopter rotor blade in its plane of rotation. Lead-lag motion is the freedom given to each blade of a rotor to allow it to move in the plane of rotation independently of other blades. This is to avoid bending stress at the root. The blade is allowed to lead or lag about a dragging hinge, but movement of the hinge is restricted by some form of drag damper to avoid undesirable oscillations. Also known as dragging or drag. See drag (ii).

Aviation dictionary. 2014.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Motion simulator — Simulator seating St. Louis Zoo A motion simulator or motion platform is a mechanism that encapsulates occupants and creates the effect/feelings of being in a moving vehicle. Motion simulators fall into two categories (described below) based on… …   Wikipedia

  • Motion picture rating system — Parental Guidance redirects here. For the Singaporean TV series, see Parental Guidance (TV series). For the Judas Priest song, see Parental Guidance (song). A motion picture rating system is designated to classify films with regard to suitability …   Wikipedia

  • lead — i. The first aircraft in a formation (lead aircraft). ii. The angular difference between the line of sight and an aiming line. See angle of lead. iii. The amount one cyclic motion is ahead of another, expressed in degrees. The opposite is lag …   Aviation dictionary

  • motion sickness — Synonyms and related words: Minamata disease, airsickness, altitude sickness, anoxemia, anoxia, anoxic anoxia, anthrax, black lung, caisson disease, car sickness, chilblain, decompression sickness, frostbite, immersion foot, itai, jet lag, lead… …   Moby Thesaurus

  • jet lag — Synonyms and related words: Minamata disease, altitude sickness, anoxemia, anoxia, anoxic anoxia, anthrax, black lung, caisson disease, chilblain, decompression sickness, frostbite, immersion foot, itai, lead poisoning, mercury poisoning, motion… …   Moby Thesaurus

  • dragging — The freedom given to each blade of a rotor to allow it to move in the plane of rotation independently of other blades. It is basically the angular oscillation of a rotor blade in the plane of rotation about a substantially vertical axis. This is… …   Aviation dictionary

  • Helicopter rotor — This article is about helicopter main rotor systems. For antitorque control, see tail rotor. Helicopter rotor The rotor head of a Sikorsky S 92 A helicopter main rotor or rotor system is a type of fan that is used to generate both the aerodynamic …   Wikipedia

  • Control theory — For control theory in psychology and sociology, see control theory (sociology) and Perceptual Control Theory. The concept of the feedback loop to control the dynamic behavior of the system: this is negative feedback, because the sensed value is… …   Wikipedia

  • Helicopter — For other uses, see Helicopter (disambiguation). Helicopter An LAPD Bell 206 …   Wikipedia

  • Electrical ballast — Choke ballast (inductor) used in older lighting. This example is from a tanning bed. Requires a lamp starter (below) and capacitor …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”