MACH - Various MACH Related Definitions
Magnus effect ...
An indication of the relative lift of an aerofoil.
Lift-Drag Ratio ...
LIFT COEFFICIENT - A number that aerodynamicists use to model all of the complex dependencies of shape, inclination, and some flow conditions on lift. CL is the non-dimensional coefficient of lift.
The Lift Coefficient and the Drag Coefficient represent the changes in lift and drag as the angle of attack changes.
The lift coefficient can thus be effectively doubled with relatively simple devices (flaps and slats) if used on the full span of the wing.
Leading Edge Slats ...
The remaining plot choices show Lift or Lift Coefficient -Cl versus each of the input variables. For these plots, the current value of the flow conditions is shown as a red dot on the plot.
The wing section (tested as the Gottingen 289 section after the war) had a maximum lift coefficient of about 1.4. Making estimates for each of the triplane wings (working as independent surfaces), the planes would require 19.
When the wing is stalled and the angle of attack is greater than the stalling angle, any increase in angle of attack causes a decrease in lift coefficient that causes the wing to descend.
Since the AOA is fixed at best glide, so, also, is the lift coefficient. There is only one factor that we can vary to adjust the lift to match any change in effective weight, the speed.
With classic airfoils, those used over the last 30 to 50 years, we have accustomed to a maximum lift coefficient of 1.4 to 1.5 with a 12 to 15% thick (d/e) airfoil and a drag coefficient of .01 in cruise configuration (ie.
Non-symmetrical cambered airfoils have a higher lift coefficient, but they also
have a negative pitching moment (Cm) tending to pitch nose-down, and thus
being statically unstable, which requires the counter moment produced by the ...
Technology / Aviation / Lift-Drag Ratio: The lift coefficient of a wing divided by the drag coefficient, as the primary measure of the efficiency of an aircraft: aka L/D Ratio.
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Other Words for Ratio ...
LIFT-DRAG RATIO - The lift coefficient of a wing divided by the drag coefficient, as the primary measure of the efficiency of an aircraft; aka L/D Ratio.
L is the lift
k is the Smeaton coefficient- 0.005 (the drag of a 1-square-foot (0.093 m2) plate at 1 mph)
Cl is the lift coefficient (the lift relative to the, or L/D)
A is the area in square feet ...
See also: Lift, Aircraft, Wing, Speed, Drag