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
    Re: Harrison's H1
    From: Brad Morris
    Date: 2009 May 6, 16:32 -0700

    I must say the one of the more enjoyable parts of my many visits to the UK was 
    seeing H1 functioning at the Royal Observatory.  Okay, I realize that makes 
    me an engineering wonk, but I just couldn't take my eyes off of it.  
    Wonderful instrument.  A marvel.
    I was confused, at first, by the odd analog hands and dials.  For example, the 
    minutes dial goes from 0 to 59 and from 0 to 59 in one revolution, with a 
    hand that points to both sides (and the same number).  Why would he do that?  
    I finally realized that Harrison was balancing the hands.  Rotating up would 
    take more energy than rotating down.  Therefore, the clock could speed or 
    slow down, if we had a hand like modern clocks.  Gravity would play a part.  
    Solution: give it two hands that point at the same number on either side of a 
    dial.  Brilliant!
    I wish the horologist nothing but the best of luck.  Bring H1 back to life!
    Best Regards
    Navigation List archive: www.fer3.com/arc
    To post, email 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