1967 Cessna 185 (Robinson STOL vortex generators)
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1967 Cessna 185 (Robinson STOL vortex generators) ...
Vortex Generator
Aviation Definitions by Subject
14 CFR 1.1 16G Abbreviation Acronym Aerodynamics Aircraft Airline Airlines Airport Airports Airworthiness AMT ATC Aviation Safety Aviation Weather Avionics Bird Strike Engineering ETOPS FAA FAA ...
Vortex generators
These are comb like protrusions on the top of the wing.
Vortex: A fluid in rotational motion, such as a whirlpool.
W
Wake: That part of a fluid, such as air, in which the pressure head has been changed by the passage through it of a body, such as an aerofoil.
vortex generators are small plates about an inch deep standing on edge in a row spanwise along the wing. They are placed at an angle of attack and (like a wing airfoil section) generate vortices.
Do vortex generators play the same role as dimples on a golf ball? Not exactly. Unlike a golf ball, a wing is supposed to produce lift.
The vortex ring state can be completely avoided by descending on flightpaths shallower than about 30 degrees (at any speed).
Settling with power, also known as a vortex ring state, is when the aircraft is unable to arrest its descent due to the rotor's downwash interfering with the aerodynamics of the rotor.
This is the wing vortex. The tightness of the curling of the wing vortex is proportional to the rate of change in lift along the wing. At the wing tip the lift must rapidly become zero causing the tightest curl.
At a hover, the rotor tip vortex (air swirl at the tip of the rotor blades) reduces the effectiveness of the outer blade portions. Also, the vortexes of the preceding blade severely affect the lift of the following blades.
Wing Tip Solutions: A significant interference with the air spillage around the wing tip limits the vortex. Such interference is achieved by constructing a wing tip the is either diverting the higher pressure under the wing upward or downward.
With drooped or raised wing tips, the vortex is forced further out. Drooped wing tips are often seen on STOL aircraft, but they create a weight penalty since they need to be added to the wing.
Figure 6 - Drooped / Raised Wing Tips ...
VOR: Radio nav aid, named after the VORtex effect of pilots trying to home in on it.
Windsocks: Socks that need darning.
Yankee: Any pilot that asks Houston tower to "Say again." ...
They are particularly useful in preventing spanwise flow at high angles of attack, by shedding a vortex, similar to that of a wing fence. Vortilons generate a vortex over the upper surface at high angles of attack.
However, to confirm your statement, the Airman's Information Manual (AIM) clearly states in Section 3, Paragraph 7-3-3, the greatest vortex strength occurs when the generating aircraft is HEAVY, CLEAN and SLOW.
 See also: Power, Aircraft, Flight, Pilot, Speed
  
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