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    Interpreting certain German airfoils

    Does anyone know how to interpret certain German airfoils like the ones from Heinkel, Blohm Voss and Arado? Here's an example Heinkel He 177 Wing Root: He 1.5 36.8 17.3-0.715-36.6 Wing Tip: He 1.5 36.8 10-0.715-36.6 Arado Ar 234 Wing Root: Ar 1.267 20 13-1.1-35 Wing Tip: Ar 1.227...
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    Can Anyone Help With A Mystery Propeller?

    Hi all, apologies for crashing into the forum with a question. I've had this Rotol type propeller in my possession for some 15 odd years. My wife bought it for me as a Birthday present from the small ads in Flypast. The seller didn't know what it was from but sold it as 1940's vintage...
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