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Spitfire pedal adjust gear

Hi guys Im just after some thread info and some measurements for the pedal adjusting worm gear on the Spit..All I could find..

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By: QldSpitty - 4th December 2016 at 09:27

Cheers mate…Had a feeling it was ACME with less Wile E Coyote…

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By: cornovii - 28th November 2016 at 18:30

Hi Ross. I was able to measure up a original that was as per drawing 30033/sht 3H. I think the one in your photo is from a later Mk. The drawing says square thread or acme. I measured it to be 5 tpi so I made mine 5 tpi acme. Seems to work just fine for me. I’m sure someone who knows a lot more than me will come along with a proper drawing!
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