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 Horizon, K & E USN No. 6
    From: Bruce J. Pennino
    Date: 2012 Nov 26, 09:14 -0500
    Here is more info on my AH. 
    Yes the brass domed nut is "foreign".  It covers the  1/32 " +/- diameter hole in the funnel. If the surveyor lost the plug that goes into the jug, the cap would minimize spillage of the Hg .  The funnel and jug are ferrous metals.  I removed the funnel top and moved away from the jug.  My compass indicates it is definitely an iron/steel.
    Based on the roughness of the jug and funnel I first thought it all was cast iron. But then I wondered if cast iron can be threaded so finely. Also the inside of the funnel is quite polished.  Now I think the  funnel at least is steel...maybe cast?
    The height of the triangular hood at the peak is  about 4.75 inches. The outside dimensions of the carrying box are: 8 1/2 inches across the front (ouside to outside); 6 inches front to back; and 6.25 inches high.
    The total height of the jug with the foreign cap is about 5 inches.  Bottom diameter of jug is 2.75 inches. Based on the rim of the jug, the jug wall thickness might be as much as 1/4"....heavy duty!  The basin is 3.23x 6.5 inches (nominal outside). Its  pool depth is about 0.5".  I assume there is about 1/8" additional freeboard for handling and Hg sloshing around.
    Still hoping someone out there knows what the missing pieces" look like".

    ----- Original Message -----
    Sent: Sunday, November 25, 2012 6:23 PM
    Subject: [NavList] Re: Artificial Horizon, K & E USN No. 6

    Thank you for posting these interesting images. What please are the diameter and height of the bottle?

    It is difficult to identify the materials. Some of the parts seem to be made of a yellow metal, but I would expect everything to be made of cast iron or steel, since many other metals and alloys are soluble in mercury.

    I suspect the brass domed nut is a "foreigner" and it would probably be safest to have the missing transition piece machined from cast iron or steel.

    Bill Morris
    New Zealand
    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]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