A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Soaring
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Opinions on NASA lift theory?



 
 
Thread Tools Display Modes
  #1  
Old July 1st 18, 03:08 PM posted to rec.aviation.soaring
Matt Herron Jr.
external usenet poster
 
Posts: 548
Default Opinions on NASA lift theory?

Interesting read...

https://www.grc.nasa.gov/www/K-12/airplane/wrong1.html
  #2  
Old July 1st 18, 04:09 PM posted to rec.aviation.soaring
Scott Williams
external usenet poster
 
Posts: 198
Default Opinions on NASA lift theory?

On Sunday, July 1, 2018 at 9:08:44 AM UTC-5, Matt Herron Jr. wrote:
Interesting read...

https://www.grc.nasa.gov/www/K-12/airplane/wrong1.html


Try "Stick and Rudder", by Langeweische.

But, of course flight is really just witchcraft ;-)

Scott
  #3  
Old July 1st 18, 04:17 PM posted to rec.aviation.soaring
George Haeh
external usenet poster
 
Posts: 257
Default Opinions on NASA lift theory?

The previous webpage offers the correct mechanism:

https://www.grc.nasa.gov/www/K-12/airplane/right2.html

Note that in: F = m * dV/dt

F and V are vectors with components in 3 dimensions. Of course the z-axis is of most interest. Drag and vortex effects manifest themselves principally in the x and y axes.

And yes, there's a vast amount of mythology on lift generation in most pilot textbooks.
  #4  
Old July 2nd 18, 01:59 AM posted to rec.aviation.soaring
jfitch
external usenet poster
 
Posts: 1,134
Default Opinions on NASA lift theory?

On Sunday, July 1, 2018 at 11:17:23 AM UTC-4, George Haeh wrote:
The previous webpage offers the correct mechanism:

https://www.grc.nasa.gov/www/K-12/airplane/right2.html

Note that in: F = m * dV/dt

F and V are vectors with components in 3 dimensions. Of course the z-axis is of most interest. Drag and vortex effects manifest themselves principally in the x and y axes.

And yes, there's a vast amount of mythology on lift generation in most pilot textbooks.


All of the several valid theories of lift are simply mathematical models, not the reality itself. The Bernoulli mechanism does in fact generate lift, but does not explain or predict it well, so it is best discarded as less than the whole picture. There's lifting line theory, circulation theory, deflection theory - no shortage of models.
  #5  
Old July 2nd 18, 03:09 AM posted to rec.aviation.soaring
Charlie Quebec
external usenet poster
 
Posts: 253
Default Opinions on NASA lift theory?

A wing deflects air downwards, and the upward force is applied to the wing via Bernoulli pressure distributions.
If you disagree, tell me where the reaction force is applied and how.
Every airfoil has a known pressure distribution, as this is the way airfoils are designed.
Simple, well known science.
Why the constant attempts at mumbo jumbo theories exist is a total mystery to me.
  #6  
Old July 2nd 18, 03:11 AM posted to rec.aviation.soaring
Charlie Quebec
external usenet poster
 
Posts: 253
Default Opinions on NASA lift theory?

https://www.mh-aerotools.de/airfoils...tributions.htm
  #7  
Old July 2nd 18, 05:03 AM posted to rec.aviation.soaring
Marcel
external usenet poster
 
Posts: 1
Default Opinions on NASA lift theory?


Nah, it's due to lift demons:
http://messybeast.com/dragonqueen/liftdemon.htm
(Author thanks Mary Shafer, NASA-Dryden (now NASA-Armstrong) for revealing the truth)

  #8  
Old July 2nd 18, 02:42 PM posted to rec.aviation.soaring
Scott Williams
external usenet poster
 
Posts: 198
Default Opinions on NASA lift theory?

On Sunday, July 1, 2018 at 9:08:44 AM UTC-5, Matt Herron Jr. wrote:
Interesting read...

https://www.grc.nasa.gov/www/K-12/airplane/wrong1.html


I've also heard that it is the impact of ascending angels on the lower surface of the airframe, but they take breaks sometimes to pray, usually along with the pilot :-)
  #9  
Old July 2nd 18, 03:39 PM posted to rec.aviation.soaring
Martin Gregorie[_6_]
external usenet poster
 
Posts: 699
Default Opinions on NASA lift theory?

On Mon, 02 Jul 2018 06:42:46 -0700, Scott Williams wrote:

On Sunday, July 1, 2018 at 9:08:44 AM UTC-5, Matt Herron Jr. wrote:
Interesting read...

https://www.grc.nasa.gov/www/K-12/airplane/wrong1.html


I've also heard that it is the impact of ascending angels on the lower
surface of the airframe, but they take breaks sometimes to pray, usually
along with the pilot :-)


A similar theory about how competition free flight model aircraft was
around several years ago, only instead of demons, its creatures were
small, fat, furry Bernoulli Balls. Like the demons, these hold onto
models wings to support them when they are flying and won't go near a
really ugly model.

However, they are also responsible for thermals, which occur when crowds
of Bernoulli Balls dance around because they are warm, happy and excited.
Models that enter a thermal are grabbed and included in the dance. This
also explains why there are no thermals at night - the BBs are all
sitting on the ground, worn out by their day's activities.


--
Martin | martin at
Gregorie | gregorie dot org
  #10  
Old July 2nd 18, 10:38 PM posted to rec.aviation.soaring
Dan Marotta
external usenet poster
 
Posts: 4,601
Default Opinions on NASA lift theory?

So how does all of this (lift demons, CDU, etc.) explain the fact that
British aeroplanes [sic] also fly?Â* They make some of the ugliest planes
in the world, except for the Spitfire, there must have been a Frenchman,
an Italian, or an American involved in that design.

God bless the Queen!

On 7/2/2018 8:39 AM, Martin Gregorie wrote:
On Mon, 02 Jul 2018 06:42:46 -0700, Scott Williams wrote:

On Sunday, July 1, 2018 at 9:08:44 AM UTC-5, Matt Herron Jr. wrote:
Interesting read...

https://www.grc.nasa.gov/www/K-12/airplane/wrong1.html

I've also heard that it is the impact of ascending angels on the lower
surface of the airframe, but they take breaks sometimes to pray, usually
along with the pilot :-)

A similar theory about how competition free flight model aircraft was
around several years ago, only instead of demons, its creatures were
small, fat, furry Bernoulli Balls. Like the demons, these hold onto
models wings to support them when they are flying and won't go near a
really ugly model.

However, they are also responsible for thermals, which occur when crowds
of Bernoulli Balls dance around because they are warm, happy and excited.
Models that enter a thermal are grabbed and included in the dance. This
also explains why there are no thermals at night - the BBs are all
sitting on the ground, worn out by their day's activities.



--
Dan, 5J
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Theory John Cochrane[_2_] Soaring 9 October 10th 11 08:47 PM
Theory Exam Alan Erskine[_3_] Aviation Photos 0 November 24th 08 03:55 PM
The 777 crash - another theory D Ramapriya Piloting 82 January 25th 08 04:27 PM
[Q] Strikefinder Theory of Operation [email protected] Home Built 11 September 19th 07 04:47 PM
so much for the big sky theory soxinbox Piloting 5 April 24th 06 08:07 PM


All times are GMT +1. The time now is 07:09 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 AviationBanter.
The comments are property of their posters.