Re: OT Forget rocket engines...and also walls and wounded animals

On 29 May, 13:19, Quadibloc <jsav...@xxxxxxxxx> wrote:
On May 29, 5:55 am, Pat Flannery <flan...@xxxxxxxxxx> wrote:

If you want to you get something that interacts with the atmosphere,
head for the article about the Magnus Effect Rotors:

http://blog.modernmechanix.com/2008/05/15/spinning-wing-airliner/

Ah, the wing doesn't spin on the top like a helicopter, but instead
there's a cylinder as a segment within the wing to modify the airflow
so as to reduce turbulence.

Now, I'm no expert on aerodynamics, but that sounds like it makes
sense, and I wonder what experimental results led to nothing coming of
it. (One possibility is that a cylinder with a smooth surface doesn't
efficiently transmit its motion to the air, and slowing down the air
below adds too much to drag. But those are things that could be fixed
by small modifications.)

Rotating cylinders will work. However as stated orifices on the top
surface of a wing work a lot better as far as creating a vortex is
concerned.

As we are all aware the Navier Stokes equation has a large number of
solutions. One solution is a mass of rotating air at the top of the
wing. This wil suck the aircraft up.

Now as far as small modifications are concerned the small
modifications will be in terms of having a large number of small jets
to ensure the solution we want. The solution we want is complex in the
case of a moving aircraft. They will need constant tweaking from a
computer. As we know airflow is chaotic, to get the right solution we
need constant tweaking.


- Ian Parker
.

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