Welcome to the NavList Message Boards.

NavList:

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

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: Experience with an artifical horizon
    From: Marty Lyons
    Date: 2020 Oct 15, 16:00 -0700

    I have some issues with these floating mirror artificial horizons. First, normal mirrors are made flatness tolerances unknown to us, me at least. However, they are the best we have without going to optical quality first surface mirrors, after all it's only for practice anyhow. Secondly, gluing mirrors to some flotation device cannot be done uniformly, varying thickness of glue, varying pressures during gluing etc. Thirdly, varying flatness of the surface of the flotation devices. Fourth, variations in the density of the flotation devices, be it foam, wood or whatever, will affect the height it will float in the liquid affecting the levelness of the top surface and mirror. I think any measurements taken with floating mirrors should be done twice in opposite orientations as Greg suggested. I think floating mirror systems are really introducing more errors. Just my thoughts as an engineer and amateur navigator.

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    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