Howard Wilkinson wrote:

Paul:
    Included are three spreadsheets in a self extracting zip file.... just
double click and it will expand them........... they are taken to some
really
absurd extremes of the spectrum.  Speed_pitch gives pitch in inches for a
given RPM and air speed..... this is the zero AOA pitch.  Stations shows the
angle in degrees of the prop blade at given distances from center.
Increments begin 1" apart and later are 3" apart.  The distance from center
is listed in the left column and you can change the value in this column
which will effect all the figures for the whole row.  The pitch values are
listed on top and you can likewise change these values and the column will
be recalculated.  I originally began this at 40" pitch and later in the
spread sheet I began reducing clear down to 1" pitch.    The third
spreadsheet shows sonic RPM for a given diameter.  I made these just to look
at the numbers several years ago when I was playing with wind chargers.

                                                            H.W.

 
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