NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Malaspina
From: Alexandre Eremenko
Date: 2007 Oct 5, 19:40 -0400
From: Alexandre Eremenko
Date: 2007 Oct 5, 19:40 -0400
On Sat, 6 Oct 2007, George Huxtable wrote: > I was particularly interested in the > quintant, by Gabriel Wright of London, > which must be about the first > quintant ever. Its increased angular > range (144 degrees) over the sextant > (120) was really intended for taking > widely-spaced Sun lunars and for Is there a picture of this quintant somewhere on the Internet? I've seen several quintants in the book "Taking the stars" and in the museums and on e-bay. And it is frequently claimed that they were made for wide spaced Lunars. My own SNO has theoretical range 140 degrees which is closer to a quintant than to a sextant with 120 or 125 degrees. And I tried several Lunars when the distance was more than 130. My experience shows that this is practically impossible with ordinary arrangement of the mirrors. I think this explains why quintants are relatively rare. Alex. --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---