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    Kollsman averagers
    From: Gary LaPook
    Date: 2009 Nov 24, 21:52 -0800

    Ronald, maybe you can answer a question for me. I have several Kollsman
    periscopic bubble sextants and an MA-2 hand held Kollsman bubble
    sextant. These all have the same averagers that run for two minutes. I
    also have an MA-1 pendulous mirror hand held Kollsman sextant that has
    the same averager except that the averager only runs for one minute. The
    MA-1 manual states that it should run for only one minute so my MA-1
    averager works properly.
    
    My question, why was the MA-1 averager set to run for only one minute
    while all the others run for two minutes. My understanding is that the
    two minute averaging period was chosen to span more that one normal
    oscillation period of the plane so as to be able to cancel the normal
    accelerations during the oscillation period. So, why only one minute for
    the MA-1 since it was used in the same type aircraft with the same
    oscillation period?
    
    gl
    
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