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: Matthew Gianelloni
    Date: 2020 Oct 14, 04:24 -0700

    Water for me for the sun.

    And.

    I built a thing a while back for stars and moon and it worked with SOME inaccuracy, but not TOO much.

    I got a really thin circular mirror from Hobby Lobby. It's a crafting item. 8 inch diameter. Bout 6 dollars

    Went to Walmart and got a foam poster board. Cut an 8 inch octagon and glued it to the back of the mirror. Tried to minimize the glue to avoid differences in thickness. 3 dollars.

    Filled a motor-oil-changing pan with water and floated the mirror on it.

    In good darkness, it works great. You have to get away from the house.

    BEST PART is, no ripples from the wind. Even in a wind that would completely negate your sight in water, it just pushes the mirror to one side of the pan.

    For the sun, (this is a little crazy, but it works) I went to Tractor Supply an got the darkest welders helmet replacement glass they had and zip tied it to an old pair of sunglasses. 10 dollars. Then you can use the mirror without sunshades on the sextant. BEST PART of an artificial horizon for the sun and moon is, no semi-diameter correction, and no upper or lower limb to deal with. Just match images and half the value.

    Will post pictures. 

    Matt

       
    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