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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant frames
From: Brad Morris
Date: 2009 May 13, 09:25 -0400
From: Brad Morris
Date: 2009 May 13, 09:25 -0400
Hi Bill Thanks for confirming what should be the standard mode of operation. Naturally, there are two sources of heating. One is the radiated energy being applied by the rays of the sun. The other is the atmosphere surrounding the sextant. If we wanted to analyze the sextant just for radiated energy, we would place the sextant in a vacuum chamber and apply radiated energy. Hard to operate in the vacuum, but it would separate out the ambient energy from the radiated energy. What your test shows is that the caution about warming a metal sextant out of the rays of the sun is perhaps a bit over the top. The distortion of a metal frame, just as theorized, is negligible. Perhaps you can perform the same experiment with a plastic sextant, where the warming of the radiated energy would predominate over the ambient energy. Best Regards Brad "Confidentiality and Privilege Notice The information transmitted by this electronic mail (and any attachments) is being sent by or on behalf of Tactronics; it is intended for the exclusive use of the addressee named above and may constitute information that is privileged or confidential or otherwise legally exempt from disclosure. If you are not the addressee or an employee or agent responsible for delivering this message to same, you are not authorized to retain, read, copy or disseminate this electronic mail (or any attachments) or any part thereof. If you have received this electronic mail (and any attachments) in error, please call us immediately and send written confirmation that same has been deleted from your system. Thank you." --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---