Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    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?
    NavList message boards: www.fer3.com/arc
    Or post by email to: NavList@fer3.com
    To unsubscribe, email NavList+unsubscribe@fer3.com

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site