Mungo60
Airman
Please find attached my findings on ROTOL propeller Markings. I wrote to Dowty Propellers in the UK a few years ago, who absorbed ROTOL in the 1950's, they were very kind to send me this information. I have searched our forums here but did not find anything regarding ROTOL, I apologise in advance if I have uploaded replicated information. The markings and colour codes were of great interest to me.