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: Balloon Sextants
    From: John D. Howard
    Date: 2016 Mar 28, 10:28 -0700

    David,

    I do have the book and a whole chapter is on balloon navigation.  As I said in an earlier post the balloon pilots used a marine sextand with a bubble artifical horizon.  Other ways were used:  plumb bob, gyro stablized,and even bowls of mercury but the bubble was most common.

    The sight was the same as at sea.  Reducing the triangle with sin-log tables and map plotting.  A pain to do but dooable.In 1905 one person used the sextant and fixed his position and another looked down at a landmark.  They were about 10 mi. diference.  This was considered good enough. ( in 1977, flying the Pacific 10 mi. was OK also )

    Cel nav was not too important to balloons because they rarely went ofshore.  The biggest problem was a lack of maps.  Maps were not printed for a balloon point of view so getting landmarks - railroad tracks, water towers, dams, etc. onto a map was more important.   When the Zepplins started bombing England in WW1 they did so above an overcast sky so cel nav again became important.  They used marine-type sextants with bubble AH and did the reduction and plotting as a ship would.

    John H.

       
    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