PMD Film Transport Assembly

None

This is the film transport mechanism for a Projected Map Display. It has sprocket wheels that engage with the perforations in the side of the film plus the associated pay-out and take-up spool shafts.

This film carriage can move to displace the film side-to-side according the the aircraft's track and the whole carriage can rotate according to the aircraft's heading. Electrical connection to the various drive motors and sensors connect via the stack of gold plated slip-rings on the insulated sleeve.

Various elements of this assembly bear the ID marks (in ink):
"Drg No 75D 22540
"DL Iss 12
"Ser No. 5099"
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"Drg No 75D 22330
"D.L. Iss No 13
"Ser No. 5099"
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"Drg No 75D 22230
"DL. Iss No 10
"Ser No 5099"