- lift coefficients
- • коефициент на подемна сила
English-Bulgarian polytechnical dictionary . 2013.
lift coefficients
Look at other dictionaries:
aerodynamic coefficients — Nondimensional coefficients for aerodynamic forces and moments. The most common are the coefficients of lift and drag (i.e., CL and CD ) … Aviation dictionary
Vortex induced vibration — Vortex induced vibrations (VIV) are motions induced on bodies facing an external flow by periodical irregularities on this flow. The classical example is the VIV of an underwater cylinder. You can see how this happens by putting a cylinder into… … Wikipedia
Propeller — A propeller is essentially a type of fan which transmits power by converting rotational motion into thrust for propulsion of a vehicle such as an aircraft, ship, or submarine through a mass such as water or air, by rotating two or more twisted… … Wikipedia
Center of pressure — The center of pressure is the point on a body where the sum total of the aerodynamic pressure field acts, causing a force and no moment about that point. Mathematically it can be said that the net pressure force on the body acts through this… … Wikipedia
Magnus effect — The Magnus effect, demonstrated on a ball. v represents the wind velocity, the arrow F the resulting force towards the side of lower pressure. The Magnus effect is the phenomenon whereby a spinning object flying in a fluid creates a whirlpool of… … Wikipedia
Origin of avian flight — The Berlin Archaeopteryx, one of the earliest known birds. Evolution of flight redirects here. See also flying and gliding animals and insect flight. Around 350 BCE, Aristotle and other philosophers of the time were attempting to explain the… … Wikipedia
Bell P-63 Kingcobra — P 63 Kingcobra Role Fighter Manufacturer Bell Aircraft Corporation First flight … Wikipedia
Aspect ratio (wing) — In aerodynamics, the aspect ratio of a wing is defined as the square of the wing span divided by the wing area.:AR = {b^2 over S}where: b is the wing span, and: S is the wing area.Informally, a high aspect ratio indicates long, narrow wings,… … Wikipedia
Operation Sigma Sigma — Sigma Role Open class sailplane National origin United Kingdom Manufacturer Operation Sigma Ltd Designer John Sellars First flight 12 September 1971 Status still flying Number built … Wikipedia
Crystalline cohomology — In mathematics, crystalline cohomology is a Weil cohomology theory for schemes introduced by Alexander Grothendieck (1966, 1968) and developed by Pierre Berthelot (1974). Its values are modules over rings of Witt vectors over the base… … Wikipedia
Air flow bench — An air flow bench is a device used for testing the internal aerodynamic qualities of an engine component and is related to the more familiar wind tunnel. Used primarily for testing the intake and exhaust ports of cylinder heads of internal… … Wikipedia
