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    Re: Hat Off To Gary Lapook
    From: Gary LaPook
    Date: 2013 Mar 4, 01:02 -0800
    I did most of flight navigation with an A-10a which also has a disk that is marked with a pencil mark every second while you hold down the trigger and chase the bubble with the star. Then you take the median of the marks.

    Modern versions of the E-6B such as the MB-4A and CPU-26A/P  also have a "latitude" scale which is actually the "K" values for pressure pattern navigation and Bellamy drift.

    http://www.rekeninstrumenten.nl/pages%20and%20pictures/12081.jpg

    http://fer3.com/arc/imgx/f1-Chapter-20-from-AFM-51-40-2.pdf

    We've discussed astro-compasses before:

    http://fer3.com/arc/m2.aspx/Astro-compass-Mk11-6A1174-LaPook-jan-2012-g17896

    gl







    --- On Sun, 3/3/13, Paolo Borchetta <pb@middleeastenergyconsultants.com> wrote:

    From: Paolo Borchetta <pb@middleeastenergyconsultants.com>
    Subject: [NavList 22607] Re: HAT OFF TO GARY LaPOOK
    To: garylapook@pacbell.net
    Date: Sunday, March 3, 2013, 11:00 PM


    Gary,
    Impressive feast.....I wonder what kind of raft you keep on board after the ferry tank is installed on C-172 :)
    Here is a pic of my Link A-12 bubble octant and my astro compass, both in pristine conditions. On the left is small drift computer for Pressure Pattern navigation (Bellamy drift computation), quite rare I might say, to find.
    I never had the chance yet to use it in flight, I have to one day, it is very suitable for open cockpit as you look down into the sight rather than in line with horizon. It has a simple but smart "memory" for each sets of sights, just mark the degrees on the plastic drum, insert another one and then re-look at the data after setting the drums back on to the octant. The lighting rheostat for the bubble and the battery holder for lighting the vernier scale still work fine.
    Paolo

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