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Thread: Another Mystery Object!

  1. #1
    Join Date
    Nov 2010
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    371

    Another Mystery Object!

    Hi All

    Here's an object I picked up recently - it looks like it should be from a blind/assisted landing system but I can't find any such system by Googling. Anyone any ideas?

    It's numbered 10AF/518 and consists of two moving coil meters with connections on the four clustered terminals. One of the threaded connections is connected to the metalwork the other has no connection.


    Cheers
    James
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  2. #2
    Join Date
    May 2012
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    Preston, Lancashire
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    James,
    My copy of Section 10AF only has one page, but does include this! Not that it really helps. It says-
    "Meters, Range and Orbiting. Modified (10A/16113) by increased sensitivity and different markings. Two windings, one matted above the other. 0-500 in A sensitivity and 250-0-250 in A from centre."
    Make of that what you will!
    My copies of Section 10A don't include 10A/16113.

    Andy

  3. #3
    Join Date
    Jan 2000
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    10,054
    Looks like an early form of Range and Heading meter - so perhaps something like Rebecca?

  4. #4
    Join Date
    Oct 2006
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    8,749
    Or an early form of some sort of glide slope



    It does look a bit like a combined DME VOR ADF display.
    Last edited by TonyT; 5th December 2017 at 23:29.

  5. #5
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    Jan 2008
    Location
    The Wirral
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    More Localiser than Glide Slope. Distance and direction (no bearing, the graduations probably representing increments of 5 degrees each side) to a facility.

    Anon.

  6. #6
    Join Date
    Nov 2010
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    It suddenly occured to me that it could be a very early Sat Nav display

    Could be a 'slave' readout for a bombing computer?


    James

  7. #7
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    Preston, Lancashire
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    Does anybody have a copy of Section 10A which includes 10A/16113?
    And what might 'orbiting' mean in the context of a meter display?
    Andy

  8. #8
    Join Date
    Apr 2010
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    I wondered whether it could be a Rebecca Mk 4 range and orbit meter ? However, the only description I have is of an early model, and that doesn't seem to fit the photo.

  9. #9
    Join Date
    Nov 2010
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    371
    Hi

    Abadonna: I looked at some REBECCA items and the main readout equipment all seems to be CRT based. The distance scale on the meter itself is so coarse that I couldn't imagine it being used for any more than a rough indication of where the goal is, so perhaps a repeater for the pilot or other crew member? Either the person viewing the meter isn't involved in the final activity or the target is so big that you couldn't possibly miss it!

    Andy: I can think of a few concepts for Orbit, but none that fit well. Also you could imagine someone in 1940 thinking to themselves - 'what shall we call this sort of meter...?'

    Cheers
    James

  10. #10
    Join Date
    Apr 2010
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    42
    James,

    the range and orbit meter was a rebecca 4 add-on, additional to primary CRT display. Developed in late 1940s. Not completely sure if it went into production, although AP2276A, May 50, notes rebecca 4 has "provision" for operation with a meter.

  11. #11
    Join Date
    Jan 2000
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    10,054
    Range and Heading was used in Rebecca Mk 8 - which is why I wondered if it might be similar.

  12. #12
    Join Date
    Nov 2010
    Posts
    371
    Hi All

    Found this for Rebecca 7

    Much more sophisticated than my meter so perhaps is for an earlier version?

    Andy - this meter looks like it might deserve the 'Orbital' moniker?


    Cheers
    James
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