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Re: Testing sextant arc error
From: Brad Morris
Date: 2017 Jan 20, 11:00 -0500
From: Brad Morris
Date: 2017 Jan 20, 11:00 -0500
Bill
There is one other consideration.
The solution is going to require a very large room. If the run (throw) is 30m, then when the sextant angle is set to 45°, the wall must be 30m wide.
The solution fails, obviously, in proximity to 90°, even if a large enough room can be found
Beyond 90°, we need a second wall parallel to the first, and some way to correlate the second wall to the first
Brad
Brad
On Jan 20, 2017 3:59 AM, "Bill Lionheart" <NoReply_Lionheart@fer3.com> wrote:
Suppose you got a 30m room and a ruler calibrared in mm at one end. Then point a well collimated laser from one end of the ruler to the mirror on the sextant (horizontal on a table) so reflected a spot on the ruler. 1mm would be approx 0.1 minute. Take the average either side of the dot and use arc tan on your calculator. Depending on the length of the ruler do the full arc in several stages.Would that work?Bill
