X-Mozilla-Keys:                                                                                 
Romulo Augusto wrote:

Paul and guys,
I would like to share with you a old idea, about alternative cooling system.
Maybe someone before us had think the same. Let's go:

Thinking in liquid cooling system, we ever think in conventional radiators
blocks and derivates from it.

Let's think with me in this background ( hypotesis):

1- cooling drag is a real ( not good) fact

2- cooling drag, thus as induced drag, is more big than parasit drag, in clean
birds.

3- wings are necessary for airplane sustentation.

4- sustentation makes indeced drag, what can be decreased, but not eliminated.

5. cooling drag must be decreased. If eliminated, we will make a goal.

Tesis:

1. with less drag, best is the ratio power x cruise velocity ( so, best is
$$$$$$ relationship)

2. Jets has heat generated in his engines a lot to do de-ice by thermic de-icers
on attack side of the airfoils

3-Turbo prop do not generate heat alot to termic de-ice, so 
turbo prop uses  inflatable boots.

4- convetional engines, included rotaries, makes less heat than turbo props.

5. If we try de-ice with heat cooling liquid pre-heated by a rotary engine , the
de-ice will be unsatisfatory and the cooling fluid will decrease a lot his
temperature.

Hey, if the cooling fluid will lost heat, decreasing his temperature, is not
this the reason for a cooling system???

Thus, using thermic boots on attack side of the wings, we will eliminate the
traditional radiators blocks. Since the de-ice thermic boots has the same shape
as the original airfoil wing, we will have no cooling drag...this is almost
to discover the moto-perpetuous engine.. :-)

btw, I don't know if the correct term used in english would be "thermic boots",
as "inflatable boots".

makes any sense this principles?

Romulo

Turns out it has been tried but it does not work very well.
Its a long story Romulo and we have covered this extensively in the past
on this newsletter.

Best get the ACRE NL CD ROM and read up on it. See the ACRE NL
web site for CD ordering information.
http://home.earthlink.net/~rotaryeng/ 

Paul Lamar
 
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