NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Double vial horizon prototype
From: Randall Morrow
Date: 2012 Jan 9, 09:18 -0800
Now that I can make my own level vials a pair of them can be combined on one plate. Here is a prototype done on a plastic cutting board to illustrate:
The plate would likely be a 1/4 inch mild steel and the mirror 6 inches square. I just dropped a round one as an example. The levels would be glued in place. A lash-up like this is probably what the Amundsen team is using in that famous photograph recently posted. The Freiberger is the essentially the same but with a $900 price tag.
PS My thanks to Frank R for fixing my picture posting troubles. Can you review picture posting rules again?
I have compressed these down to less than 50 KB.
Randall F Morrow PT
Kern County - Bakersfield
NOTICE TO RECIPIENT: If you are not the intended recipient of this e-mail, you are prohibited from sharing, copying, or otherwise using or disclosing its contents. If you have received this e-mail in error, please notify the sender immediately by reply e-mail and permanently delete this e-mail and any attachments without reading, forwarding or saving them. Thank you.
From: Randall Morrow
Date: 2012 Jan 9, 09:18 -0800
Now that I can make my own level vials a pair of them can be combined on one plate. Here is a prototype done on a plastic cutting board to illustrate:
The plate would likely be a 1/4 inch mild steel and the mirror 6 inches square. I just dropped a round one as an example. The levels would be glued in place. A lash-up like this is probably what the Amundsen team is using in that famous photograph recently posted. The Freiberger is the essentially the same but with a $900 price tag.
PS My thanks to Frank R for fixing my picture posting troubles. Can you review picture posting rules again?
I have compressed these down to less than 50 KB.
Randall F Morrow PT
Kern County - Bakersfield
NOTICE TO RECIPIENT: If you are not the intended recipient of this e-mail, you are prohibited from sharing, copying, or otherwise using or disclosing its contents. If you have received this e-mail in error, please notify the sender immediately by reply e-mail and permanently delete this e-mail and any attachments without reading, forwarding or saving them. Thank you.
