This cane in a box of 1930’s aircraft bits, but might not be aviation related. Nevertheless, hopefully someone might recognize it. There are two input drives : N/S & E/W. As the drive increases the number display N, the corresponding S values decrease. I can’t think how this would be driven on an aircraft unless it was somehow linked to a compass that managed the drives. Perhaps the drive was a wind generator, which could only give ‘air miles’. But if you were crossing the Pacific and the sky was overcast, perhaps this device helped with DR navigation?
By: powerandpassion - 23rd April 2022 at 00:02
Oracal and Terry P (gold medal), thank you. The counter is free go good home if anyone wants it.
By: TerryP - 22nd April 2022 at 14:57
It looks like the counter assembly from an Air Position Indicator Mk1. The input of aim miles was derived from pitot (and static) pressure by the Air Mileage Unit then resolved into N-S and E-W in the API. Fitted to Lancaster, Shakleton, Varsity, Canberra etc. V bombers had Ground Position Indictors, similar electromechanical computing though.
By: Arabella-Cox - 17th April 2022 at 15:52
Looks very much one of the three readouts fitted to an Avro Vulcan B2 nav panel. Other UK mil types such as some marks of Canberra to.
By: powerandpassion - 17th April 2022 at 11:23
‘came’
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April 17, 2022 at 11:22 am