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By: 13th February 2015 at 15:44 Permalink - Edited 1st January 1970 at 01:00
-Well it's certainly a protractor, but aviation nav? I doubt it.
Reason for my doubt is the 1:500 scale noted on the 'ruler' part. Useless for flying, even slow-bimbling spam-cans won't use anything less than 1:250,000.
At 1:500 a trip to Berlin would need so many charts on board they'd have to leave the bombs at home.
Moggy
EDIT: However it looks like the ruler bit gives 4cm (from the white rule) = 20 somethings. If the somethings are nautical miles, then that isn't far off 1:800,000.
By: 13th February 2015 at 16:19 Permalink - Edited 1st January 1970 at 01:00
-It was found at a crash site Moggy raf bomber..
By: 13th February 2015 at 16:23 Permalink - Edited 1st January 1970 at 01:00
-As I have said, I really don't know. Just trying to think it through.
Notice that it would be useless for navigating to the West as it only has angles from 0-180 degrees, which kind of misses out 180 - 360
I am coming round to part of a sextant.
Moggy
By: 13th February 2015 at 17:13 Permalink - Edited 1st January 1970 at 01:00
-Would an item of British origin show Met (presumably for Metres) like that?
And wouldn't an issue item have an A(Crown)M stamp and a date?
Even this little steel ruler I still use has a stores or pattern reference number and date
[ATTACH=CONFIG]235310[/ATTACH]
By: 13th February 2015 at 17:31 Permalink - Edited 1st January 1970 at 01:00
-What an interesting bit of kit. First thing that comes to mind is it is like a school room protractor of modern times, but this being made of wood suggests earlier times. Could it be WW1 ? It does cover the rest of a compass circle round to 360 Degrees, but I guess you hold pencil in that small notch in centre and swivel the thing to where needed. So I'd say definitely used on Naval or early flying charts. I've never seen one of these wooden items before. If this was found at an RAF Bomber crash site, that means WW2 and who is to say what RAF Bomber navigators carried with them in their bags. The Nav who then may have used this one, must have had his reasons. (then again, I could well be way out wrong -lol :confused:. )
Bill T.
By: 13th February 2015 at 18:25 Permalink - Edited 1st January 1970 at 01:00
-During my childhood EACH schoolboy/schoolgirl in our country was required to have such protractor in his/her schoolbag. Those individual protractors had size about one half of palm of the hand, and were made of tin-plate (most part of them) or aluminium (minor part). Later there were used - and are in use today - plastic protractors.
And each mathematical classroom in each school has large version of protractor with size like the 19'' computer display. Those large protractors were used for demonstration purposes and were made of hardboard with wooden parts.
By: 13th February 2015 at 20:22 Permalink - Edited 1st January 1970 at 01:00
-Thanks guy's i have never seen one like this before...
By: 14th February 2015 at 11:39 Permalink - Edited 1st January 1970 at 01:00
-Left at the crash site by a member of the recovery team?
By: 14th February 2015 at 15:38 Permalink - Edited 1st January 1970 at 01:00
-So they werent british then?
By: 14th February 2015 at 17:30 Permalink - Edited 1st January 1970 at 01:00
-Metres have never been used in British aviation to my knowledge.
Moggy
By: 14th February 2015 at 18:56 Permalink - Edited 1st January 1970 at 01:00
-Thanks Moggy...
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By: Peter - 13th February 2015 at 15:33
Anyone have an idea on this item? I want to say Nav protractor but I can't seem to fnd anything like it online??