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
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Re: Bill Morris' MHR1 reproduction
    From: Wolfgang Hasper
    Date: 2021 Jun 14, 09:40 +0200
    Greetings from 49.8N 008.8E!
     
    For all Concentrics and aspiring slide rule makers:
    Laminated paper tubes are still in stock.
    A few machined bases/handles as well.
     
    If you want some drop me a line to wolfgang (dot) hasper (at) web ( dot) de
     
    The circular cam lock on my MHR1-inspired replica still works well and is easy to make with simple tools (manual fretsaw is fine). Please refer to photos and dxf file in the earlier posts.
    You can easily decide for yourself whether it locks clockwise of anticlockwise :)
     
     
    Fair winds
    Wolfgang
     
     
     
     
    Gesendet: Sonntag, 13. Juni 2021 um 05:30 Uhr
    Von: "Francis Upchurch" <NoReply_Upchurch@navlist.net>
    An: wolfgang.hasper@web.de
    Betreff: [NavList] Re: Bill Morris' MHR1 reproduction
    Greetings from occasionally sunny Cornwall. I am 8 miles from the G7 summit and therefore President Biden is temporarily my neighbour!  Let's hope he does good work there.
    Delighted to read of continued interest in Byraves and similar German .versions.
    I built several Byrave replicas about 10+ years ago using very basic methods. Disabling chronic illness prevents anymore building projects, but I can still just about manage a sextant sight and the Bygrave. My favourite Byrave moment was in 2014 when Gary La Pook and I did a Byrave re-enactment of the famous Chichester flight across the Tasman sea. We basically reworked the data from his chart and Frank's Web site to work out where the sun was back then and much to my amazement, got exactly the same results with our different Bygraves. (Thanks again Gary, if you still remember it?). One thing that has always surprised me about that incredibly dangerous flight was why he did not choose a time when the moon was up and handy. Surely a few sun/moon fixes would have been a lot more reliable and less stressful than 6 hours of dead reckoning and recomputed sun only altitudes? Maybe I'm missing something. 
    After a few crazy years let's hope for a better future.
    Best wishes
    Francis  
     
     

     

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    NavList is a community devoted to the preservation and practice of celestial navigation and other methods of traditional position-finding. We're a group of navigators, navigation enthusiasts and hobbyists, mathematicians and physicists, and historians interested in all aspects of navigation but primarily those techniques which are non-electronic.

    To post a message, if you are already signed up as a NavList member, start a new discussion or reply to any posted message and use your posting code (this is a simple low-security password assigned when you join). You may also join by posting. Your first on-topic messsage automatically makes you a member, and a posting code will be assigned and emailed to you for future posts.

    Uniquely, the NavList message boards also permit full interaction entirely by email. You can optionally receive individual posts or daily digests by email, and any member can post messages by email (bypassing the web site) by sending to our posting address which is "NavList@NavList.net". This functionality is similar to a traditional Internet mailing list: post by email, read by email, reply by email. Most members will prefer the web interface here for posting and replying to messages.

    NavList is more than an online community... more about that another day.

    © Copyright notice: please note that the rights to all messages and posts in this discussion group are held by their respective authors. No messages or text or images extracted from messages may be reproduced without the explicit consent of the message author. Email me, Frank Reed, if you have any questions.

    Join / Get NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID 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