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    Re: Bygrave formula
    From: Geoffrey Kolbe
    Date: 2014 Jun 07, 15:55 +0100

    On 06/06/2014 07:11, Hanno Ix wrote:
    > Why has Bygrave chosen his particular set of equations and his design?
    > 
    > The formula :
    > 
    > sin(hc) = sin(D)·sin(L) + cos(D)·cos(L)·cos(t)
    
    And the formula for Zn.... how would you calculate that on a slide rule?
    
    
    -- 
    Dr Geoffrey Kolbe, Riccarton Farm, Newcastleton, TD9 0SN
    Tel: 013873 76715 Mob: 07811 154621
    

       
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