Paul,
            In your book “How to cool your wankel” there are many formulas and charts and I have just down loaded the paper on wedge design from your web site on same.  The problem I have is trying to translate the formula into English  as to how to calculate the width of the opening of the wedge which is the figure “Z”  The paper is not physically clear as in print quality, but enough to totally confuse me.  Just what are the parameters used to calculate Z?  For those in Aus and NZ I still have a supply of the book for purchase without having to pay the freight from the USA.  $45.00 in OZ and $50.00 to NZ in AUD.  Neil.

I take it that is "Oblique Flow Headers for Heat Exchangers". Correct?

I also take it it is equation 5 on page 273.

The parameters are in the definitions on page 271.

I extracted them blew them up and cleaned them off. Here they are.

I never really understood a math formula until I learned to program in BASIC.
I would have the BASIC evaluate any equation while varying the parameters.
This gives far more information as to what is really happening.

Z = X squared times y for a simple example

Lets say  y = 3 for starters. A known.

Program:
For x = 1 to 100
print x^2 times Y
next x

The computer cranks this out in seconds
and gives you a table of answers.

Calculus becomes trivial.

Down load free QB64 and fool  around with it.

Looks like Z is a complex function of air density (rho) and the geometry
of the rad (y sub 0) in equation. 5.

Paul Lamar

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