What's this plastic plotting tool?
On a recent (first) visit to the Channel Islands, hubby & I visited an occupation memorial museum in an old gun bunker. Amongst a display of ex-Lufwaffe memorabilia was a display of nav plotting tools, most of which I could recognise from my old PPL training (plus a bit of imagination), but this one has me stumped. Apologies for quality, I've over-enhanced it from a dull photo photo.
https://cimg6.ibsrv.net/gimg/pprune....2fe75d7fd0.jpg Thanks MB |
I've copied it to an ex-colleague who was head of nav. training RAF, the CO of AIDU (charts etc.) and B Sqn at ETPS.
He knows a little about navigation and plotting. One of the few left who taught astro navigation too. If he can identify it I shall get back to you. |
I don’t recognise it from my time at a plotting table. Given it’s location could it be something to do with artillery? |
This question re-activated a memory in my failing mind. Back in 1974,while in the VIth form,I took an ' O level 'in Air Navigation,which was taught by our art teacher,Terry Jones,who was CO of the local ATC squadron,and had trained as a Pilot with the RAF in Canada,and then flew F86 Sabres.However,after a career in ATC,and knowing a lot of people involved in flying and aviation,I never met another person who admitted to having an 'O level' in this subject.Are there any others out there in PPruneland with this qualification ?
|
Originally Posted by ex82watcher
(Post 10465707)
Are there any others out there in PPruneland with this qualification ?
I remember it as being pretty easy - the met stuff was mainly applying what I'd already done in physics and the nav stuff was three-dimensional geometry that I'd already done in additional maths. Three months of an hour every wednesday night and swatting the textbook for the nomenclature the night before the exam got me an A without much actual work.And as I remember it did give me more time to focus on stuff like air law and RT during the actual PPL course. PDR |
MB It looks very similar to a Trajectory Table, I was on a course (FORTRAN) where a member was programming such a thing. Not being a Gunner it was all a bit 'over my head'.
|
My colleague thinks it is similar to a device used to calculate the forward throw of a bomb, but since it was found in an old gun bunker it's probably an early form of analogue shell ballistics/ trajectory calculator.
Seems logical. |
Originally Posted by dook
(Post 10466055)
My colleague thinks it is similar to a device used to calculate the forward throw of a bomb, but since it was found in an old gun bunker it's probably an early form of analogue shell ballistics/ trajectory calculator.
Seems logical.
Originally Posted by FantomZorbin
(Post 10465990)
MB It looks very similar to a Trajectory Table, I was on a course (FORTRAN) where a member was programming such a thing. Not being a Gunner it was all a bit 'over my head'.
MB |
Would you like to post the original photograph please, before you tried to enhance it.
I'll take it into Photoshop and try to reveal more detail. |
looks very similar to this
https://www.google.com/search?rlz=1C...b6GX3hY6BGKqM: or many other similar examples (all paper based) I can find on Google Would it be the same calculations for air-launched ordnance? |
Originally Posted by dook
(Post 10466160)
Would you like to post the original photograph please, before you tried to enhance it.
I'll take it into Photoshop and try to reveal more detail. https://cimg1.ibsrv.net/gimg/pprune....5358197305.jpg have fun MB |
Looks like a flight time calculator to me.
|
"Are there any others out there in PPruneland with this qualification ?"
Yes - circa 1975 and again through my ATC squadron. Largely self-taught although we had one session with an ex-RAF Liberator navigator. |
Photoshop reveals nothing new.
|
Originally Posted by golfbananajam
(Post 10466188)
looks very similar to this
https://www.google.com/search?rlz=1C1GCEA_enGB807GB807&q=artillery+trajectory+chart &tbm=isch&source=univ&sa=X&ved=2ahUKEwjnvvSE3YviAhWRo3EKHf4E Do4QsAR6BAgGEAE&biw=1920&bih=1095#imgrc=nb6GX3hY6BGKqM: or many other similar examples (all paper based) I can find on Google Would it be the same calculations for air-launched ordnance? It would be of passing interest to know what the scales meant and how it was used, if anybody knows. Otherwise I'll take it that it's some sort of ballistics calculator that's got mixed up in a display of air navigation bits. Dook, many thanks for trying photoshop. thanks all MB |
I am almost certain it was mixed up with navigation pieces because the people who set it didn't have a clue.
I conclude that Pruners have probably solved it. |
All times are GMT. The time now is 08:44. |
Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.