June 8, 2009 at 6:38 pm
I found this when clearing out my late fathers shed and just kept it without
knowning any of its background.


After googling, I can find a mk 4a computor to be around the early 1950’s but can anyone put a date on this one please?
I am aware that there is a slide scale missing that slips through the middle.
Thanks in advance.
Brian.
By: Oxcart - 10th June 2009 at 21:14
Thanks a lot, Smirky!
By: smirky - 10th June 2009 at 20:49
pictures of the 6b/144 MkIIIc computor – thanks Oxcart 🙂
By: Oxcart - 10th June 2009 at 20:13
PM replied too!
By: smirky - 10th June 2009 at 19:40
PM sent 🙂
By: Oxcart - 10th June 2009 at 16:19
It said something about security, suggested i email the administrator, i clicked on that and TRIED to do that, but then it said something like ‘HTTP’s are not supported’ and wouldn’t let me!-then i tried to use my phone and it had seized up!-i swore quite a lot and gave up!-MY GOD I HATE MODERN TECHNOLOGY!!
By: smirky - 10th June 2009 at 15:50
check that the file size and type are within the rules
By: Oxcart - 10th June 2009 at 15:09
… and after seemingly 10 minutes of waiting for file to be uploaded, i get a message saying “upload of file failed”- with absolutely no explanation as to why this has happened- PLEASE, SOMEBODY TELL ME THAT THIS SORT OF STUFF DOESN’T ONLY HAPPEN TO ME!!
By: smirky - 10th June 2009 at 14:51
you press the paperclip button in the middle of the top toolbar
By: Oxcart - 10th June 2009 at 14:27
So, how do you get a picture on here??:o
By: pimpernel - 10th June 2009 at 07:07
Thanks everyone for an excellent thread
Thanks oxcart for the tact. As you might guess 6B/125 (lower number) would be older and therefore wartime …… Please post a pic if possible.
pimpernel, Knots and MPH has been discussed recently, see
http://forum.keypublishing.com/showthread.php?t=88696&highlight=knots+mph
Thanks for the pointer smirky.
Great stuff!!
Brian.
By: smirky - 10th June 2009 at 00:36
Thanks everyone for an excellent thread
Thanks oxcart for the tact. As you might guess 6B/125 (lower number) would be older and therefore wartime …… Please post a pic if possible.
pimpernel, Knots and MPH has been discussed recently, see
http://forum.keypublishing.com/showthread.php?t=88696&highlight=knots+mph
By: Oxcart - 9th June 2009 at 22:25
…And forget i mentioned “map”-must’ve been a senior moment!
By: pimpernel - 9th June 2009 at 21:41
Thanks to all for your help with this.
Between 1944 -1950 then?
My next question – did the term knot take over from mph for military aircraft as some of the early ones I thought were in mph – I could be wrong with this one?
I forgot to mention that its from a DH Mosquito. Evilbay here it come’s -tic :dev2:
Brian.
By: Oxcart - 9th June 2009 at 21:19
Thanks, Smirky!- the stores number is 6B/144 and under a hinged front section with some sort of dial on the front, it does have a scrolling arrangement with a knob to control it-but it looks like graph paper (to me) rather than a map-with numbers at intervals fanned out and within a moveable ring with degrees on it-underneath a perspex cover-the cover has 3 crosses in pencil on it-so its obviously seen some use!
By: smirky - 9th June 2009 at 20:50
If its the one with the red scrolling graph and the knobs then I’m pretty sure its older. Does it have a stores number on it?
By: Oxcart - 9th June 2009 at 19:29
Mine is marked on the box “Computer Navigational MK III C”-it looks more modern than the one pictured, though-any (relevant!) info would be appreciated!
By: Arabella-Cox - 9th June 2009 at 17:39
CRP-4, that is posh.
Lol, my dad still uses an ancient CRP-1 for flight planning. Got a nicer one somewhere though……
Also useful for tide calculations when sailing.
By: smirky - 9th June 2009 at 17:33
I was waiting for an expert poster but, in my opinion, it is after 1944 because it is not marked AM and before the “early 1950s” when the mk4a came out.
By: Oxcart - 9th June 2009 at 17:27
Shame that this is not helping Pimpernel, though
By: Oxcart - 9th June 2009 at 17:23
Patina?-10 minutes outside with the weather we’ve been having down here lately should do it! 🙂