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Search: Posts Made By: roulishollandais
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Forum: Tech Log
22nd Nov 2016, 09:00
Replies: 388
Views: 99,899
Posted By roulishollandais

Thank you John and Owain. An interesting...

Thank you John and Owain.
An interesting reference about creation of vortices is the 2016 Nobel Prize of Physic too, despite it matters about topological phase transition and quantic theory.
And...
Forum: Tech Log
5th Dec 2012, 17:02
Replies: 388
Views: 99,899
Posted By roulishollandais

Thank you for that drawing from Leonardo da Vinci...

Thank you for that drawing from Leonardo da Vinci !
He did not chose to draw streamlines, nor streamtubes, only vortexes :)
Forum: Tech Log
3rd Dec 2012, 16:38
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop Did Dubois, Robert and Bonin try to understand...

Did Dubois, Robert and Bonin try to understand theory on lift with all the wrong stuff taught in flight schools when they were deepstalling ??? :{
Forum: Tech Log
1st Dec 2012, 18:58
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop @Machinbird, Thank you for this link opening...

@Machinbird,
Thank you for this link opening our mind, increasing the quality of the common vocabulary, and pulling us far from fear from new ideas, would they seem iconoclastic at the first glance....
Forum: Tech Log
19th Nov 2012, 15:54
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop In France many strange things are told about...

In France many strange things are told about creationists schools...:E
Some of you perhaps were in such schools ?

A strange ref too, but correct, with bifurcation :
Mitchell Feigenbaum -...
Forum: Tech Log
17th Nov 2012, 19:19
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop Fractals shape is characteristic with his...

Fractals shape is characteristic with his bifurcations.

Feigenbaum unified them. He met Libchaber who has got very famous for his two little vortex in a small box of helium...

Albert J....
Forum: Tech Log
17th Nov 2012, 17:52
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop Thank you John! Rh:rolleyes: in Windows ...

Thank you John!
Rh:rolleyes:

in Windows
demarrer
executer
charmap.exe
OK

in charmap array
Forum: Tech Log
16th Nov 2012, 14:28
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop GREEK LETTERS

Owain Glyndwr , OWAIN GLYNDWR

OwainGlyndwr , OWAIN GLYNDWR :D

Method : :( Oh! Sorry ! I was still writing with greek letters ! :}

Method:
Use free Open Office,
select latin...
Forum: Tech Log
14th Nov 2012, 17:16
Replies: 388
Views: 99,899
Posted By roulishollandais

1. ...take care to that mistake (sleep better !) ...

1. ...take care to that mistake (sleep better !)
Drag and Lift are not connected to gravity direction, but to airspeed direction.

Weight and Power come in balance (or unbalance) with Drag and...
Forum: Tech Log
13th Nov 2012, 17:33
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop @Owain Glyndwr, FlightPathOBN, I don't have...

@Owain Glyndwr, FlightPathOBN,

I don't have much time now, but immediately Thank you for your contribution.

I liked that pictures only to show turbulence, and to help to forget the post #1...
Forum: Tech Log
12th Nov 2012, 17:35
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop @Owain Glyndwr, The problem with...

@Owain Glyndwr,



The problem with streamlines exists inside and outside of the boundary layer.
You have chaos everywhere turbulence exists...

Site Web pour cette image...
Forum: Tech Log
2nd Nov 2012, 16:56
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop @Owain Glyndwr, Thank you for the excellent...

@Owain Glyndwr,

Thank you for the excellent Arvel E. Gentry document. That can be taught to begin. The most of the false theories are well explained. In his document "streamlines" may be...
Forum: Tech Log
23rd Oct 2012, 17:09
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop ...If mathematicians are aerodynamic pedants, I...

...If mathematicians are aerodynamic pedants, I accept the mockery at the expense of revenge .. :)
rh
Forum: Tech Log
20th Oct 2012, 21:38
Replies: 388
Views: 99,899
Posted By roulishollandais

Hi Owain, Thank you for your answer. ... I...

Hi Owain,
Thank you for your answer. ... I reject the "idea" of streamline, as it is just an idea, and idea do not fly... It was an idea for the time of closed windtunnel! We are in 2012 .We are...
Forum: Tech Log
20th Oct 2012, 17:45
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop à Italia458, Owain Glyndwr, We already...

à Italia458, Owain Glyndwr,

We already rejected here these picture (despite coming from NASA).

Try to draw it at infinite...left and right, up and down, and 3-D of course, you have surprises...
Forum: Tech Log
19th Oct 2012, 18:39
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop Definition of independant "streamline"...

Definition of independant "streamline" please....:}
Forum: Tech Log
16th Oct 2012, 15:44
Replies: 388
Views: 99,899
Posted By roulishollandais

Prandtl

I learned a lot seeing the old "polaires de Prandtl"...:ok:
they are the Cz(Cx) closed graphs at a definite airspeed.
Would anybody know where we could find them on the Web ? Thanks
Forum: Tech Log
6th Sep 2012, 19:34
Replies: 388
Views: 99,899
Posted By roulishollandais

Sites and books

Hi John Tullamarine, Pugillistic Animus, Bubbers44, other books lovers,

Perhaps could PPRuNe's "Theory on lift "thread have a list of useful web links (like AF447 list, John ! :ok:) and useful...
Forum: Tech Log
30th Aug 2012, 19:50
Replies: 388
Views: 99,899
Posted By roulishollandais

Hi Pugillistic Animus, You will see birds,...

Hi Pugillistic Animus,
You will see birds, rivers, hurricanes, FCS, etc. otherwise after reading James Gleick about fractals ... A good index will help you to sort different matters after a first...
Forum: Tech Log
30th Aug 2012, 17:32
Replies: 388
Views: 99,899
Posted By roulishollandais

http://www.newscientist.com/blogs/culturelab/2012/...

http://www.newscientist.com/blogs/culturelab/2012/08/23/51%2BV7-46DdL._SL500_AA300_.jpg
Hi Pugillistic Animus,

I am glad to tell about fractals also known as Theory of chaos.

This excellent...
Forum: Tech Log
29th Aug 2012, 19:30
Replies: 388
Views: 99,899
Posted By roulishollandais

Less complex that Navier Stokes equations! We...

Less complex that Navier Stokes equations!
We would like to ask the drop of water in the river flowing toward the bridge how they recon their acceleration, speed, position, spin, deformation, ASO!...
Forum: Tech Log
27th Aug 2012, 16:55
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop Fortunately, birds do not have rigid tails. Being...

Fortunately, birds do not have rigid tails. Being supremely skilled at "hand flying" they do not appear to be in need of many protections. ...
Forum: Tech Log
23rd Aug 2012, 20:40
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop The pilots of AF447 seemed to be ignorant of AoA....

The pilots of AF447 seemed to be ignorant of AoA.
Airbus considered that showing the AoA on the display was not useful.
Certification administrations accepted such equipped aircraft to be used for...
Forum: Tech Log
21st Aug 2012, 20:39
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop agreed ;) Let us try to get better teachers to...

agreed ;)
Let us try to get better teachers to young pilots :)
Forum: Tech Log
19th Aug 2012, 19:54
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop ... "Math pures" complexity start as soon at ......

... "Math pures" complexity start as soon at ... zero ! 1 is not simpler, etc. . Heappily we have "mathematiques appliquées" and "calculs astronomiques" to do it simplier ! And Libchaber two little...
Forum: Tech Log
18th Aug 2012, 18:56
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop Hi Pugilistic animus ! Karman of course !...

Hi Pugilistic animus !

Karman of course ! and Libchaber, Lorenz, Feigenbaum, and so many great great great physicians, mathematicians....

RIP taboos, and Boltzmann, Navier or Stokes...
Forum: Tech Log
5th Aug 2012, 20:08
Replies: 388
Views: 99,899
Posted By roulishollandais

Snoop soldier on

@extricate:
if you prepare exam, flight licences, Atpl instructor qualification, etc. or if you want a well paid carrier in aerospace, stay on 1.
If you want to understand how birds fly, how...
Showing results 1 to 27 of 27


 
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