Directorly Downwind Faster than the Wind

[Ted Ewert]

This is a very common misconception regarding aerodynamics.  The great majority of lift is always provided by reaction lift.

Not always. In a big jet it is, but in smaller craft Bernoulli lift plays a larger part. But then, we aren't talking about an airplane wing here are we?

Judging by the prop speed of the Black Bird vehicle and the portion of the prop which allows for such, the relatively miniscule gains provided by the 'Bernoulli effect' are wholly insufficient to account for the effects we are witnessing.

Your "reactive lift" in this type of prop results in axial thrust. This is obviously the major axis of thrust for any prop. However, in order to drive the wheels there has to be radial thrust. Unless you believe that all the thrust is coming from the reactive component.
I can't see the exact contour of the prop they are using. Nevertheless, most propellers are designed with an integral an airfoil (this would be to take advantage of the Bernoulli effect). As the rotation speed of this type of propeller increases, the Bernoilli effect would increasingly exert rotational thrust.

http://www.centennialofflight.gov/essay/Theories_of_Flight/props/TH18G3.jpg

What we are witnessing covers much more territory than aerodynamics alone and is allegorical to effects which, once fully understood, will be revealed to have long been applicable to both the largest and the smallest of possible scales.


TS

And that would be??

[ramset]

Gentlemen,
All theories aside
I love the wind!
http://www.youtube.com/watch?v=jCuP-XHefTo&feature=related

And I believe "absolutely".
We will fly with no power![in any direction or wind]

Just have to put together the pieces!

Chet

[TechStuf]

You dispute my theory, which is fine, yet you offer nothing better.

http://amasci.com/wing/airfoil.html

http://mb-soft.com/public2/lift.html

And that would be??

....a question most easily asked when one pops into a thread without studying what has already been said.



Ramset, I believe you just might be right! 




TS
 

[Ted Ewert]

....a question most easily asked when one pops into a thread without studying what has already been said.
 




TS

An answer most easily given when a real one is unavailable.

Ted


P. S. I already read through the thread.

[TechStuf]

P. S. I already read through the thread.

Then I must ask, what remains so persuasive to you about the Bernoulli principle as being the chief acting force behind the phenomenon?  That is, assuming you understand the force of this principle relative to the other forces involved.


TS