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Search: Posts Made By: FlightPathOBN
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Forum: Tech Log
2nd Apr 2013, 20:54
Replies: 388
Views: 99,891
Posted By FlightPathOBN

If there is anything more than an AoA of 0, then...

If there is anything more than an AoA of 0, then there is compression.
Forum: Tech Log
2nd Apr 2013, 15:16
Replies: 388
Views: 99,891
Posted By FlightPathOBN

junebug...interesting video, although the airfoil...

junebug...interesting video, although the airfoil they used is in stall.

A wind tunnel does not model the compression of the air below the wing due to the weight/force of the aircraft 'planing'...
Forum: Tech Log
1st Apr 2013, 19:05
Replies: 388
Views: 99,891
Posted By FlightPathOBN

Couple of aircraft here illustrating Flaps and...

Couple of aircraft here illustrating Flaps and Vortex generation...

http://operationsbasednavigation.com/wordpress/wp-content/uploads/2013/04/FlapWake5-e1364843041888.jpg
...
Forum: Tech Log
4th Dec 2012, 23:35
Replies: 388
Views: 99,891
Posted By FlightPathOBN

HN39,, Good form!

HN39,,
Good form!
Forum: Tech Log
3rd Dec 2012, 22:13
Replies: 388
Views: 99,891
Posted By FlightPathOBN

This is the established and accepted resultant......

This is the established and accepted resultant...

http://ars.els-cdn.com/content/image/1-s2.0-S0376042110000576-gr4.jpg

does that fit within that diagrams parameters?

In CFD, would this look...
Forum: Tech Log
3rd Dec 2012, 15:41
Replies: 388
Views: 99,891
Posted By FlightPathOBN

The reason that I included wake, and wake...

The reason that I included wake, and wake calculations was relevant. If the resultant cannot be accurately measured, it leads one to doubt the rest of the calculations, methodologies used in...
Forum: Tech Log
2nd Dec 2012, 17:18
Replies: 388
Views: 99,891
Posted By FlightPathOBN

I have just looked at the aerospaceweb article on...

I have just looked at the aerospaceweb article on ground effects. Sorry, but I find little, in regards to ground effect, is based on reality as we understand it today. ...
Forum: Tech Log
30th Nov 2012, 21:32
Replies: 388
Views: 99,891
Posted By FlightPathOBN

Think about that. Hold a wing section in...

Think about that.
Hold a wing section in place. Now consider a 'scale weight' for your section. Your assumption of simply holding it in place, accounts for the weight of the aircraft, and the...
Forum: Tech Log
30th Nov 2012, 18:04
Replies: 388
Views: 99,891
Posted By FlightPathOBN

Unfortunately, I am not a big fan of wind...

Unfortunately, I am not a big fan of wind tunnels.
While one can scale the model, you cannot scale the air. There are a few full scale wing only tunnels I believe, but again, I have not seen...
Forum: Tech Log
30th Nov 2012, 17:13
Replies: 388
Views: 99,891
Posted By FlightPathOBN

exactly...this 'unseen cushion' in flight,...

exactly...this 'unseen cushion' in flight, becomes apparent next to the unmovable surface, and is how ground effect vehicles maintain altitude.

Ground effect is relevant, by illustrating the...
Forum: Tech Log
30th Nov 2012, 15:05
Replies: 388
Views: 99,891
Posted By FlightPathOBN

If Bernoulli's principles explain lift, how does...

If Bernoulli's principles explain lift, how does that explain ground effects on final?

PJ2...I really dont think this experiment explains lift, as there is no load on the airfoil. It may explain...
Forum: Tech Log
14th Nov 2012, 19:54
Replies: 388
Views: 99,891
Posted By FlightPathOBN

Owain, Will have to take some time to look...

Owain,

Will have to take some time to look through much more of the thread. So many issues have been brought up, and by so many people, it is difficult to see which question(s) were answered, and...
Forum: Tech Log
14th Nov 2012, 17:33
Replies: 388
Views: 99,891
Posted By FlightPathOBN

http://www.ae.illinois.edu/m-selig/ads/afplots/b73...

http://www.ae.illinois.edu/m-selig/ads/afplots/b737a.gif

http://www.ae.illinois.edu/m-selig/ads/afplots/b737d.gif

Airfoil database.... UIUC Airfoil Data Site...
Forum: Tech Log
14th Nov 2012, 15:04
Replies: 388
Views: 99,891
Posted By FlightPathOBN

The aircraft is planing through the air, the...

The aircraft is planing through the air, the weight of the aircraft, with angle of attack of the wings, compresses the airmass to provide level flight. (notice as the aircraft fuel load lightens, the...
Forum: Tech Log
14th Nov 2012, 00:44
Replies: 388
Views: 99,891
Posted By FlightPathOBN

on a lighter note...Newton rules and Bernoulli...

on a lighter note...Newton rules and Bernoulli drools...



just let that sink in....



agreed, if the deflection of the combined compressive air mass did not equal the weight of the...
Forum: Tech Log
12th Nov 2012, 20:36
Replies: 388
Views: 99,891
Posted By FlightPathOBN

plausible deniability...:rolleyes:

plausible deniability...:rolleyes:
Forum: Tech Log
12th Nov 2012, 18:40
Replies: 388
Views: 99,891
Posted By FlightPathOBN

The only part of that statement that is correct...

The only part of that statement that is correct is "these vortices are real"

The illustrations that are provided with the entire post are oversimplified and misapplied to wake turbulence......
Forum: Tech Log
15th Oct 2012, 22:50
Replies: 388
Views: 99,891
Posted By FlightPathOBN

If the wing section at AoA of zero degrees...

If the wing section at AoA of zero degrees produces no lift, then the lift associated with a wing section must be associated with Newtonian physics rather than Bernoulli gas laws...

Actually, IF...
Forum: Tech Log
23rd Aug 2012, 21:04
Replies: 388
Views: 99,891
Posted By FlightPathOBN

mount a bubble in the cockpit...its as easy as...

mount a bubble in the cockpit...its as easy as that.

Old school AoA angle and inertial speed.....
Forum: Tech Log
26th Jul 2012, 20:28
Replies: 388
Views: 99,891
Posted By FlightPathOBN

If Bernoulli is correct, why do they put wing...

If Bernoulli is correct, why do they put wing designs in a wave tank to test them!?!?! :}
Actually, using a wave tank is wrong anyways, because while you can compress air, but you cannot compress...
Forum: Tech Log
25th Jul 2012, 21:19
Replies: 388
Views: 99,891
Posted By FlightPathOBN

now you understand why winglets look like they...

now you understand why winglets look like they do....
Forum: Tech Log
25th Jul 2012, 15:11
Replies: 388
Views: 99,891
Posted By FlightPathOBN

Bernoulli's principle is generally explained by...

Bernoulli's principle is generally explained by the argument that the faster speed of the air along the top of the wing leads to reduced air pressure above and hence produces a lift.
Given this,...
Showing results 1 to 22 of 22


 
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