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3664shaken · 07-31-2009, 09:17 AM

Ryan,

I spent a lot of time looking into this and the confusion seems to be what Denker is saying happens in ground effect.

“When you are flying in ground effect, you are influenced by the mirror image of your bound vortex. Specifically, the flow circulating around the mirror-image bound vortex will reduce the airflow over your wing. I call this a pseudo-tailwind”

http://www.av8n.com/how/htm/airfoils.html#text61
Section 3.12.5

The only problem with this is that I can find NO corroboration of this statement in any source that I have or on the internet. The closest thing I found was another person who thought Ground Effect immediately slowed the A/C down because the IAS dropped. But that is just a build up of static pressure registering on the A/S indicator, the TAS has not changed.

If you can back up Denker’s conjecture with multiple sources then we can talk about it. Otherwise I have to stick with the a majority on this one.

Cheers.

07-31-2009, 09:17 AM	#16 (permalink)
3664shaken On Reserve Joined APC: Nov 2006 Posts: 15	Ryan, I spent a lot of time looking into this and the confusion seems to be what Denker is saying happens in ground effect. “When you are flying in ground effect, you are influenced by the mirror image of your bound vortex. Specifically, the flow circulating around the mirror-image bound vortex will reduce the airflow over your wing. I call this a pseudo-tailwind” http://www.av8n.com/how/htm/airfoils.html#text61 Section 3.12.5 The only problem with this is that I can find NO corroboration of this statement in any source that I have or on the internet. The closest thing I found was another person who thought Ground Effect immediately slowed the A/C down because the IAS dropped. But that is just a build up of static pressure registering on the A/S indicator, the TAS has not changed. If you can back up Denker’s conjecture with multiple sources then we can talk about it. Otherwise I have to stick with the a majority on this one. Cheers.