WANTED - BAP speedometer driven gear

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paul.jameson
Holder of a Golden Anorak
Holder of a Golden Anorak
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Re: WANTED - BAP speedometer driven gear

Post by paul.jameson »

The PA speedo has a flex speed of 2240. The chronometric has a flex speedo of 1910. If you have the wrong gearing, 1910/2240 or 2240/1910 will be the factor by which it is wrong. Riding past one of those signs which tell you whether you are breaking the speed limit or not is a good way to check.

Ariel first fitted the chronometric speedo in 1939 when it was driven from the front wheel. I suspect you may have postwar gears in a prewar gearbox shell.
Paul Jameson
35 LG (project), 37 RH500, 52 ex ISDT KHA, 54 KH(A), 75 Healey 1000/4.
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist (but not Machine Registrar), Gauges and Clocks Spares Organiser.
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