I didn't even know these were in existence ....buying one for sure. I also agree...very informative thread!
Looking around some of my favorite sights and seen a Ted Cash 19th Century Range Finder. It looks pretty neat! It is solid brass with a sliding bar that measures distances from 50 to 800 yards.( So they say? ) It sells for around $30.00. Does anyone own one of these? I really have no need for one of these so I will save my money. They are pretty cool though. Respectfully, cowboy
what a superb find! Thanks very much for highlighting itAnother great trick that works on the same principal is that you can estimate sunlight remaining by holding your arm straight out with the fingers bent at 90° in front of you and every finger width is 15 minutes of light remaining above the horizon.
I forget what the name for such things are. If it uses a dowel instead of a string it's called a "Jacob's Staff". Sea captains/navigators would mark a card to hold up towards a rock or lighthouse on shore that was a known height so they could judge distance off.
http://arxiv.org/ftp/arxiv/papers/1205/1205.2078.pdf
Ihttps://www.budk.com/Frankford-Arsenal-Range-Finder-Brass-Construction--48481I am pretty sure these guys have misunderstood how their range finder works, because they are confusing it with the Ted Cash design , which was held vertically. From my reading of "A System of Target Practice" (1862) the cut-out triangle represents the gradual increase in height of a man, with increasing proximity. So the sliding gnomon is slid horizontally, and that slit in it is a window. What do you think?
I have just read the Henry Heth notes carefully, now. And it is clear that the sight picture is between C-A and C-B in the triangle, when the instrument is held horizontally
I have just read the Heth notes as well. You are 100 % correct. I think I will purchase one of these to try it out.https://www.budk.com/Frankford-Arsenal-Range-Finder-Brass-Construction--48481I am pretty sure these guys have misunderstood how their range finder works, because they are confusing it with the Ted Cash design , which was held vertically. From my reading of "A System of Target Practice" (1862) the cut-out triangle represents the gradual increase in height of a man, with increasing proximity. So the sliding gnomon is slid horizontally, and that slit in it is a window. What do you think?
Tinworm, I certainly will.I plan on making my own. I don't really have a use for it, as I don't have a range over 50 yards. But I think it is a lot of fun and makes an interesting project.
Will you let us know how you get on, Bull
look forward to itTinworm, I certainly will.
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