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    Trombone Kamal Prototype
    From: Greg Rudzinski
    Date: 2009 Jun 3, 10:52 -0700

    --- On Wed, 6/3/09, Greg Rudzinski  wrote:
    > From: Greg Rudzinski 
    > To: gregrudzinski---.com
    > Date: Wednesday, June 3, 2009, 10:46 AM
    > The Trombone Kamal gives the 9th
    > century Kamal a 20th century facelift.
    > How to make your own.
    > Materials:
    > - 3.5 x 5" x 1/8" white plex which is transparent enough to
    > see a faint image of the sun through it at low altitudes.
    > - Standard metal tape measure.
    > - Electrician tape (black).
    > - Scotch tape (clear).
    > - Black felt tipped pen.
    > 1. Lay a strip of electricians tape along the 3.5" base of
    > plex. This will be the horizon reference line.
    > 2. Using a black felt tipped pen precisely draw in lines
    > spaced 1", 2", and 4" above the electrician tape horizon
    > reference.
    > 3. Place clear scotch tape over black lines to fix and
    > protect from smudging.
    > How to use.
    >      Place the metal tape measure end
    > centered just below the horizon reference. Hold in place
    > with index finger and thumb then trombone the tape measure
    > out until pressed below the eye. Adjust the tape measure in
    > or out until the sun and horizon are bracketed by reference
    > lines. The hs altitude will be the inverse tangent of 1", 2"
    > or 4" over the tape measure reading. A K&E 4080-3 10"
    > slide rule works well for this calculation.
    >      Relative bearings, doubling the
    > angle on the bow, and distance off by vertical angle are
    > piloting applications that can also be performed by the
    > Trombone Kamal.
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