Quote:
Originally Posted by unemployedagain
This reduction in downwash
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Not really sure what you are talking about with this statement. See below, where I correct one of my previous statements.
Quote:
Originally Posted by unemployedagain
increases the effective angle of attack of the wing so that it creates more lift and less drag than it would otherwise. This phenomenon is ground effect.
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Effective angle of attack is useless term IMO, that was introduced by pilots to avoid having to describe what is really happening. What happens isn't a change in some arbitrary idea "effective angle of attack," but instead each angle of attack has an increase in its efficiency or an increased lift for any given AOA. This is due to the increase in lift coefficient discussed throughout this forum, not some imaginary term.
Correcting a previous claim:
Earlier I claimed forms of lift include: impact, downwash or deflected air, and bernoulli.
This was a false claim which I later found out from another forum member and confirmed through "Flight Theory for Pilots" by Charles Dole and "Introduction to Aircraft Flight Dynamics" by Louis Schmidt.
The difference in air pressure around the wing is what causes lift, some of this from Bernoulli's principle and other more complex factors. Point is, lift is measured from one idea, pressure difference above versus pressure difference bellow the wing. All pressures above the wing is calculated and then all pressures below is calculated, their difference is lift.