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Re: Trombone Kamal Prototype
From: Greg Rudzinski
Date: 2009 Jun 4, 20:18 -0700
From: Greg Rudzinski
Date: 2009 Jun 4, 20:18 -0700
Trombone Kamal sun observation data set 6/4/09 34� 10'N 119� 14'W from shore at a 20ft.height of eye. Altitude Intercept 13� 25' 2.7'A 13� 05' 7.3'T 11� 50' 4.6'A 11� 01' 2.0'T 10� 00' 9.7'T 9� 14' 14.7'T 7� 56' 2.1'A 7� 05' 6.3'T 6� 10' 4.1'T 5� 24' 6.3'T Avg. 4.1'T Scatter 19.7' On Jun 3, 9:57�pm, Greg Rudzinskiwrote: > 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 -~----------~----~----~----~------~----~------~--~---