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Search: Posts Made By: Lyman
Showing results 1 to 35 of 72
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Forum: Tech Log
5th Dec 2012, 18:20
Replies: 388
Views: 99,891
Posted By Lyman

The airplane in level steady flight knocks the...

The airplane in level steady flight knocks the air into many "pieces", and it is not willingly the means of separation; here is drag. And Friction, and 'resisted', and viscosity, and compression....
Forum: Tech Log
3rd Dec 2012, 17:23
Replies: 388
Views: 99,891
Posted By Lyman

Upwash increases due the increasing pressure...

Upwash increases due the increasing pressure beneath, which is caused by restricted flow due to the 'funnel' created by the proximity of the solid ground.

It is a 'channel', and resists the entry...
Forum: Tech Log
3rd Dec 2012, 14:59
Replies: 388
Views: 99,891
Posted By Lyman

"Upwash only occurs at the leading edge." ...

"Upwash only occurs at the leading edge."

Yes, having originated from beneath it. Right?
Forum: Tech Log
3rd Dec 2012, 13:56
Replies: 388
Views: 99,891
Posted By Lyman

Hi Owain I understand the problem related to...

Hi Owain

I understand the problem related to compression (pressure) and Newton. That is why I always use mass when discussing the theory.

Any (local) 'modification' of a dynamic system...
Forum: Tech Log
2nd Dec 2012, 22:26
Replies: 388
Views: 99,891
Posted By Lyman

I think it is to do with Newton, in this regard....

I think it is to do with Newton, in this regard. Mass, as unperturbed air in front, is loath to move, "Remain at rest" (#1). Once entered the stream tube, it is loath to rest, 'momentum' (#2)....
Forum: Tech Log
2nd Dec 2012, 19:39
Replies: 388
Views: 99,891
Posted By Lyman

Hi Owain... "so as the TE gets nearer the...

Hi Owain...

"so as the TE gets nearer the ground the more momentum the underwing flow has to shift to get by, so the bigger the force (pressure) it will need."

Does the streamline contact the...
Forum: Tech Log
2nd Dec 2012, 18:43
Replies: 388
Views: 99,891
Posted By Lyman

Hallelujah.... The year of my birth no less....

Hallelujah....

The year of my birth no less. Yes, I think wake is not related here, many strings of discussion at once....

Can you comment on my proposition that the "box" effect of the bound...
Forum: Tech Log
2nd Dec 2012, 17:42
Replies: 388
Views: 99,891
Posted By Lyman

FP.... The center drawing showing...

FP....

The center drawing showing "compressed" vortices gives one pause. RE: Ground Effect, a deflection of vortex means exactly what to 'lift'? The vortices may be on "rebound", but how do we...
Forum: Tech Log
1st Dec 2012, 22:45
Replies: 388
Views: 99,891
Posted By Lyman

I like the mirrored silhouette. Alot. I picture...

I like the mirrored silhouette. Alot. I picture it is a little "blurry" in outline, however, since it is composed of streamlines rather than Aluminum.

The incidence of the wing has not changed,...
Forum: Tech Log
1st Dec 2012, 22:05
Replies: 388
Views: 99,891
Posted By Lyman

The decrease in pressure causing the "additional...

The decrease in pressure causing the "additional lift"?

Is the underwing increase due the "Ram"? The overwing decrease due the foreshortened vortices?

The difference you describe shows the...
Forum: Tech Log
1st Dec 2012, 21:34
Replies: 388
Views: 99,891
Posted By Lyman

Hi HazelNuts39... Yours, "The pressure...

Hi HazelNuts39...

Yours,

"The pressure distribution around the wing is the same as it would have out of ground effect at a somewhat greater angle of attack."

Are these relative distributions...
Forum: Tech Log
1st Dec 2012, 20:47
Replies: 388
Views: 99,891
Posted By Lyman

'Low aspect ratio results in greater downwash,...

'Low aspect ratio results in greater downwash, due to increased vortex strength. How on earth does a wing "trap" air????????'

You confuse 'trap' with your mistaken conclusion re its definition....
Forum: Tech Log
1st Dec 2012, 18:47
Replies: 388
Views: 99,891
Posted By Lyman

Howdy Machinbird.... from the linked essay: ...

Howdy Machinbird....
from the linked essay:
"An additional bonus of ground effect that becomes more significant as speed increases is called ram pressure. As the distance between the wing and...
Forum: Tech Log
30th Nov 2012, 17:46
Replies: 388
Views: 99,891
Posted By Lyman

Hi PJ2 This is as close to perfection as i...

Hi PJ2

This is as close to perfection as i can imagine.

"I would disagree that there is no "load" on the airfoil. Wouldn't load be a resistance against a force whether something is held in...
Forum: Tech Log
30th Nov 2012, 16:58
Replies: 388
Views: 99,891
Posted By Lyman

I don't think it is a wind up. There is a...

I don't think it is a wind up. There is a fundamental communication problem in this discussion that may never go away.

Mass is perturbed, redirected, and the perturbing mass changes direction and...
Forum: Tech Log
30th Nov 2012, 15:33
Replies: 388
Views: 99,891
Posted By Lyman

FlightPathOBN... Some one must open...

FlightPathOBN...

Some one must open Bernoulli's pipe to explain it? At the ceiling?

A "Half Pipe"?
Forum: Tech Log
19th Nov 2012, 16:16
Replies: 388
Views: 99,891
Posted By Lyman

Why such definition? A Shear face, the airtube...

Why such definition? A Shear face, the airtube does not exist until the water becomes shallow enough to allow the shear. No maelstrom can exist at depth.
No filament may originate in the fluid........
Forum: Tech Log
19th Nov 2012, 15:48
Replies: 388
Views: 99,891
Posted By Lyman

HazelNuts39 Now we're talkin'! So coriolis...

HazelNuts39

Now we're talkin'! So coriolis can be abandoned since it has "minimal effect".

Conditions must be established to allow it to obtain!

Imagine instead of the standard (typical)...
Forum: Tech Log
19th Nov 2012, 00:18
Replies: 388
Views: 99,891
Posted By Lyman

Before there is motion, there are waves. The...

Before there is motion, there are waves. The waves begin at the aperture, they cannot begin in the fluid. At the smallest disturbance in the energy field, there is an angular imprint on the soon to...
Forum: Tech Log
17th Nov 2012, 15:29
Replies: 388
Views: 99,891
Posted By Lyman

They are round because it is the only shape that...

They are round because it is the only shape that will not fall into the hole after removal.....

This suggests that Nature is economical, and efficient.

A ninety degree turn in a pipe is wicked...
Forum: Tech Log
17th Nov 2012, 15:11
Replies: 388
Views: 99,891
Posted By Lyman

Manhole covers are always round. Nature...

Manhole covers are always round.

Nature hates a corner.

Viscosity.

Rate.

"if instead of fluid, the medium was ball bearings, would there be a vortex at the drain?"
Forum: Tech Log
16th Nov 2012, 06:15
Replies: 388
Views: 99,891
Posted By Lyman

The natural tendency for any locally derived and...

The natural tendency for any locally derived and accelerated gas path that must re-enter a still mass is to curve. This does not apply to an energetic path that is parallel the direction of entry of ...
Forum: Tech Log
15th Nov 2012, 16:32
Replies: 388
Views: 99,891
Posted By Lyman

Hi Sir. I think both statements are correct,...

Hi Sir.

I think both statements are correct, though they may appear to conflict...

With the greatest respect, I have wanted to ask the following question.

Several times I have been present...
Forum: Tech Log
15th Nov 2012, 01:28
Replies: 388
Views: 99,891
Posted By Lyman

Hi HN I really like that explanation....

Hi HN

I really like that explanation. However, I did not say that all the air collides with the wing, that would not be possible, and here is where I like Bernoulli, for as you say, the theory...
Forum: Tech Log
14th Nov 2012, 23:05
Replies: 388
Views: 99,891
Posted By Lyman

Hi awblain... I may be pedantic, but I think...

Hi awblain...

I may be pedantic, but I think it is important. The aircraft hasn't an "effect" on airflow, the air is still prior to the entry of the airplane. It is the energy of the a/c that...
Forum: Tech Log
14th Nov 2012, 17:40
Replies: 388
Views: 99,891
Posted By Lyman

Bonjour roulis A theoretical for you. As...

Bonjour roulis


A theoretical for you. As to streamlines, it is accepted that no matter may pass through them, so as to wing area ( Span x mean Chord). Do these phenomena imcrease the effective...
Forum: Tech Log
14th Nov 2012, 16:54
Replies: 388
Views: 99,891
Posted By Lyman

Hi HN Point of View without question. But my...

Hi HN

Point of View without question. But my comment is framed from the Bernoulli position, that locale is all important, to the exclusion of logic, and entertaining assumptions that require the...
Forum: Tech Log
14th Nov 2012, 16:17
Replies: 388
Views: 99,891
Posted By Lyman

From the paper Power and lift In...

From the paper

Power and lift
In aerodynamics, the subject of power requirements is seldom considered. Some introductory textbooks do not even have power listed in the index. In aeronautics this...
Forum: Tech Log
14th Nov 2012, 14:44
Replies: 388
Views: 99,891
Posted By Lyman

That is a good description. The unfortunate and...

That is a good description. The unfortunate and unnecessary "battle" is joined when any two blokes start to 'defend'.

The paper Owain references is a case in point. Two highly educated and...
Forum: Tech Log
13th Nov 2012, 16:03
Replies: 388
Views: 99,891
Posted By Lyman

I have never understood the apparent need of some...

I have never understood the apparent need of some people to instantly complicate what it is they do, or believe in. It is beyond me, and is probably a topic for a social science website.

I take a...
Forum: Tech Log
12th Nov 2012, 19:17
Replies: 388
Views: 99,891
Posted By Lyman

Hi FPOBN.... Do you have a permission slip...

Hi FPOBN....

Do you have a permission slip to inject compression and viscosity?

Cheers
Forum: Tech Log
1st Nov 2012, 16:55
Replies: 388
Views: 99,891
Posted By Lyman

Those are earnest and sincere questions, do you...

Those are earnest and sincere questions, do you not understand them? Do you fear them? Are they rubbish?

Is the discussion ended?
Forum: Tech Log
1st Nov 2012, 16:39
Replies: 388
Views: 99,891
Posted By Lyman

Owain... Thank you for all that, your...

Owain...

Thank you for all that, your patience is notable, and I appreciate it.

I would like to pose some questions, of a very basic nature, in the interest of establishing a foundation.

1...
Forum: Tech Log
1st Nov 2012, 13:52
Replies: 388
Views: 99,891
Posted By Lyman

Howdy. Much of the "rubbish" I brought up was...

Howdy. Much of the "rubbish" I brought up was from the paper written by the two boffins. I will own my own, but in dismissing mine, without addressing the points from the Newton screed,...
Forum: Tech Log
29th Oct 2012, 00:44
Replies: 388
Views: 99,891
Posted By Lyman

Post Hi TURIN "Camber has no effect on lift?...

Hi TURIN

"Camber has no effect on lift? What!!!"

Who said such a thing? Not I.

From A Squared....

"Lyman, the laws governing the behavior of energy are completely independent of frame of...
Showing results 1 to 35 of 72
 
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