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: Artificial horizons
    From: Marvin Sebourn
    Date: 2003 Jul 10, 23:54 EDT
    In a message dated 7/10/2003 10:35:14 PM Central Standard Time, ARDENW714@AOL.COM writes:

    This thread has gotten me to thinking ...

    The best thing about a liquid artificial horizon is that it is gravitationally driven to be flat and level, but it suffers from breezes.

    The best thing about a mirror artificial horizon is that it's permanently flat, but it's hard to make it level.

    Has anybody tried floating a mirror on a liquid bath? You could glue it to a piece of styrofoam, and if it were only slightly smaller than the pan it's floating in, there wouldn't be much room for wind to disturb the liquid.

    I haven't tried it (this is just a gedanken experiment) - has anybody else?

    Bill Arden

    Bill, all I did was think about it also, but more in the line of considering using a flat glass plate floating in a liquid of high specific gravity. I remember from geology testing of specific gravity of unknowns, that some of the heavier liquids were quite toxic though. I know there are liquids with a higher specific gravity than quartz, ~ 2.65.

    I wonder if a mechanical pendulum or two-axis leveling system connected to a reflective optical flat on the top could be (or probably has been) developed. Sounds terribly heavy though, and large.


    Marvin Sebourn
    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)