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Thread: Chipmunk RPM Indicator System - Details Needed

  1. #1
    Join Date
    May 2007
    Posts
    259

    Chipmunk RPM Indicator System - Details Needed

    Hi, Im after a schematic detailing the RPM gauge installation in the Chipmunk to assist a restoration project the system for the single Smiths Mk IV RPM generator powering two gauges (6A/1299 if I remember correctly). Does anyone have available a copy of such a wiring drawing or schematic?

    While on the subject of the RPM gauges Im after a couple if anyone has some available.

    Many thanks

  2. #2
    Join Date
    Apr 2007
    Location
    Norfolk
    Posts
    190
    While not an approved document the pictures show extracts from a Smiths catalogue which gives technical descriptions of their instruments (using the Smiths codes of 78RV for the indicator and 54MV for the generator) and generic installations.

    Hope it's of use.

    Regards
    Dave

    Click image for larger version. 

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  3. #3
    Join Date
    Oct 2008
    Posts
    786
    Yes what he said. The wiring is slightly diferent for clockwise or anticlockwise rotation.
    Last edited by smirky; 8th November 2017 at 01:10.

  4. #4
    Join Date
    Aug 2003
    Location
    S.E. England
    Posts
    2,668
    Are you on the Facebook 'de Havilland Chipmunk Appreciation Society' group. They have a wealth of knowledge there.
    de Havilland forever!

  5. #5
    Join Date
    Jun 2012
    Location
    Solitary confinement
    Posts
    607
    https://www.facebook.com/groups/429558373751028
    Noticed on this faceache page a set of pilots notes for sale for the Chippie, scroll down on page
    "For you Hilts one month solitary watching Downton Abbey"

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