NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Two body Sandwich Fix Proforma
From: Gary LaPook
Date: 2014 Nov 15, 23:14 -0800
From: Gary LaPook <NoReply_LaPook@fer3.com>
To: garylapook@pacbell.net
Sent: Saturday, November 15, 2014 10:46 PM
Subject: [NavList] Re: Two body Sandwich Fix Proforma
From: David Pike <NoReply_DavidPike@fer3.com>
To: garylapook---.net
Sent: Saturday, November 15, 2014 6:41 AM
Subject: [NavList] Two body Sandwich Fix Proforma
Attached File:
(Sandwich-Fix-Form-276KB.JPG: Open and save)
From: Gary LaPook
Date: 2014 Nov 15, 23:14 -0800
The 7 observations only eliminate the MOO and MOB corrections but all the rest must still be applied so I wonder why this procedure was used?
gl
From: Gary LaPook <NoReply_LaPook@fer3.com>
To: garylapook@pacbell.net
Sent: Saturday, November 15, 2014 10:46 PM
Subject: [NavList] Re: Two body Sandwich Fix Proforma
Now that I understand what is going on with the "sandwich fix" I have to ask the question, "why?"
It looks like a lot of work, what was the payoff? Was it thought to be more accurate than the standard three body fix which had the standard MOO, MOB, Coriolis, rhumb line, wander and groundpeed corrections applied?
gl
From: David Pike <NoReply_DavidPike@fer3.com>
To: garylapook---.net
Sent: Saturday, November 15, 2014 6:41 AM
Subject: [NavList] Two body Sandwich Fix Proforma
Attached is an RAF two body sandwich fix proforma at 276KB (larger available). Clearly not every box had to be filled in for every body. I’m still trying to work out why we used IAS change and not TAS change. Perhaps the 6 in the ‘Sum’ column allowed for it. At high level Mach .84 always seemed to be 480kts TAS and 240kts IAS. When I get
time, and after I find my Mear’s slide, I’ll fill one in with fictitious values if I can remember what all the boxes were for. On the reverse was a three body sandwich fix proforma. That must have been really complicated. Dave
Attached File:
(Sandwich-Fix-Form-276KB.JPG: Open and save)
