I was having a browse through the boxes of various parts etc and I came across the following parts which I need to find out what they are for/from.
The first one is an easy one it is a landing type switch but has no A/M marking on it but the part number 5CW/2910. It is brown not black and I wanted to know what it would be fitted to and also if it is postwar?
Second one interesting. It is a round piece of metal about 6″ across with the following part number on it.5A/2090 and the A/M mark on the other side. It looks like it was meant to hold a guage about the size of a boost guage or something??actly is this and what would it be fitted to?
Third one is a Douglas protractor and parrallell Rule 6B/47. What was this used on?
Looking forward to comments etc!:)
By: TEXANTOMCAT - 8th March 2007 at 13:16
AHA! now it makes sense…..
TT
By: NightReaper - 7th March 2007 at 17:52
Air Ministry Markings
Graham – would you agree that while it is the general rule that anything with an AM crown must have been produced prior to 1944, many contract manufacturers continued to use pre made parts (that already had an AM crown) well into the 50’s. It’s a bit like the Kings crown / Queens crown rule – the Kings crown officially being dropped in 1952 – but still appearing for years after on certain items (I’ve also seen wartime dated items with a Queens crown!)
By: TEXANTOMCAT - 7th March 2007 at 16:05
Peter
The switch is a rotary landing light switch the Lancaster main panel has two of them. If it’s got an aiministry crown it was manufactured before the end of 1943.
well ****** me – after all these years I didnt know that!
TT
By: NightReaper - 7th March 2007 at 11:54
Well, if the disc is not from a light or lamp of some sort – then the miscellaneous section of 5A seems to be mainly amp meters and volt meters – if that helps at all?
By: Peter - 7th March 2007 at 00:48
light switch and circular plate
Graham there is no AM crown on this piece at all
Nightreaper there is a square boost guage type outline on the plate in the second picture. thanks for the ref in the ap though as it deepens the mystery..
By: NightReaper - 6th March 2007 at 23:02
5A/2095
The round thing looks like the surround bit from a runway light – anything with 5A is listed in AP1086 as ‘ground lighting and miscellaneous equipment’.
By: Graham Adlam - 6th March 2007 at 21:52
Peter
The switch is a rotary landing light switch the Lancaster main panel has two of them. If it’s got an aiministry crown it was manufactured before the end of 1943.
By: bri - 6th March 2007 at 19:21
Difficult to tell – sorry! The round plate with a hole may be a mount for a pressurization controller.
Those type numbers are definitely British military. The RAF has a huge collection of aircraft parts and details at Stafford, England. I read about it sometime back. Try searching for it on the Internet.
Sorry not more helpful.
Bri:o
By: Peter - 6th March 2007 at 01:03
pics as requested
Here are the pics
By: 682al - 5th March 2007 at 23:07
a landing type switch but has no A/M marking on it but the part number 5CW/2910
A rotary switch, Type B. Probably post war.
By: Peter - 5th March 2007 at 20:17
thanks bri
Will try and take/post pics.
By: bri - 5th March 2007 at 20:05
Can’t suggest much without pictures, but the third item was used by bomber crews to mark the planned route on a map. In the RAAF, I seem to remember our Lincoln navigators using them.
Bri:)
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March 5, 2007 at 7:51 pm