He tries to give you the facts from the source materials but maybe he got it wrong, maybe he is out of date. Sure, he warns you when he is giving you his personal techniques, but you should always follow your primary guidance Aircraft manuals, government regulations, etc. Gulfstream Aerospace Corporation has no affiliation or connection whatsoever with this website, and Gulfstream does not review, endorse, or approve any of the content included on the site.
As a result, Gulfstream is not responsible or liable for your use of any materials or information obtained from this site. This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in an effort to further education and advance flight safety. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section of the US Copyright Law.
In accordance with Title 17 U. Section , the material on this site is distributed without profit to those who have an interest in furthering flight safety. My objective is to give pilots the tools they need to fly more safely. If you are a copyright holder and see your material here, that means I think your work can help to that end. Still, if you would rather your materials not appear on this website, please "Contact Eddie" using the link below and your material will be removed.
It will be our loss, but I understand the need to protect creative rights. To answer another frequent question: Gulfstream has been very good about all of this provided I add the note shown below. Let me be clear about this: I think the world of Gulfstream Aerospace. There is no prettier wing in existence than what you see on a GV or G and the best cockpit I've ever touched is in my trusty G Thus the ground plane will furnish a restriction to the flow and alter the wing up wash, down wash, and tip vortices.
These general effects due to the presence of the ground plane are referred to as "ground effect. It's no wonder ground effect is so misunderstood and some believe all this talk about down wash is hogwash. We can do better.
Ground effect (aerodynamics)
Wing tip vortices top two and airflow about an infinite wing bottom two , from Dole , figures 2. You have more pressure under the wing than over it, so the pressure below wants to wrap around to the top.
Of course the wing is moving forward so this movement from bottom to top tends to trail aft. Since less of the aerodynamic force is pointed aft, you have less induced drag and more lift. To the pilot, the wing appears to have become more efficient because, really, it has! We, as pilots, are often taught that ground effect starts at one-half the wing span of the aircraft.
Ground effect - Wikipedia
This is not really true, it actually starts at just over one wing span but the effect is negligible. At one-half the wing span it reduces induced drag by about 9 percent and the effect builds as you get closer to the ground.
This "floating" sensation really depends on the airplane and its sensitivity to being precisely on target threshold speeds. Aircraft with very long wing spans behave differently and engine idle characteristics also impact this sensation. From Wikipedia, the free encyclopedia.
Look up ground effect in Wiktionary, the free dictionary. Ground effect may refer to: Ground effect aerodynamics , the increased lift and decreased aerodynamic drag of a wing close to a fixed surface Ground effect cars , an effect that creates downforce, primarily in racing cars Ground effect vehicle , a vehicle which attains level flight near the surface of the Earth due to ground effect Ground effect train , an alternative to a magnetic levitation train, using ground effect in aircraft to prevent the vehicle from making contact with the ground Disambiguation page providing links to articles with similar titles.
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