Beermat
Have you had access to a report from De Havilland Airscrews
Report R83
AIRSCREW PERFORMANCE CALCULATIONS by K. B. GILLMORE A. V. CLEAVER J. MULLIN, 1941
It references an earlier report, R15, on the subject.
In the history of the report section it advises that Mr F.M. Thomas presented a lecture to the Royal Aeronautical Society on the subject (“Practical Airscrew Performance Calculations”) in October, 1937), there maybe something of interest in that lecture for you. This report supersedes the method as presented in the earlier lecture.
United Aircraft Corporation presented a report of their investigations to industry in 1934, of which there were 20 copies.
While this may not cover Rotol products, there are tables giving details of propellers not put into production, giving details like profile, dimensions and who made the blades. Also giving reference to the aircraft for which they were considered for.
I have only a couple pages from the report as I was looking into how DH designated their propeller part numbers. The details of the blades did not photograph very well as they were printed on glossy photo paper.
I did not realise that for wooden blades, DH went out to various suppliers to have them made. Names like Horden Richmond, Jablo and Airscrew Co. come up.
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