NavList:

   

Reply

Greg - Your device looks easier to construct than a Bris. I for one am
following with great interest. Up to what altitude do you think it
likely to work?  My emergency back-up has been horizon sights, which I
used routinely whenever I found myself on deck at sunrise or sunset.
-Hewitt

On 6/4/09, Greg Rudzinski  wrote:
>
>  I was able to test the Trombone Kamal prototype at the beach today and
>  found that observing the sun through scotch tape and plex wasn't going
>  to work and that an additional reference mark was needed at 3 inches.
>  The clear scotch tape was removed and the reference marks were grooved
>  in with a straight edge and razor blade then blackened with a felt tip
>  pen. Three observations were successfully performed before sunset
>  yielding  intercepts inside of 10 miles vs. GPS but more testing will
>  need to be done to confirm accuracy. The concept is showing promise.
>
>  On Jun 3, 10:52 am, Greg Rudzinski  wrote:
>  > --- On Wed, 6/3/09, Greg Rudzinski  wrote:
>  >
>  > > From: Greg Rudzinski 
>  > > Subject: TROMBONE KAMAL PROTOTYPE
>  > > To: gregrudzin...@yahoo.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.
>  >
>  > >
>  >
>
> >  IMG_4414.JPG
>  > 629KViewDownload
>  >
>  >  IMG_4415.JPG
>  > 980KViewDownload
>
> >
>

--~--~---------~--~----~------------~-------~--~----~
Navigation List archive: www.fer3.com/arc
To post, email NavList@fer3.com
To , email NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---

   

Reply