Hi Jeff

That’s a thought. We are waiting for the results of a 3 d scan of a wind tunnel model – it will be interesting to see if the profiles match..

Re the 5 digit Mainplane, that foil does fit with everything else we know, too. Funnilly enough I wa just thinking about trying a 5 digit naca foil with suffix modifiers to see if I can produce something similar to the tail section – that may be how the same numbers as the 63A-017 were generated. I wish I was better at maths! Can somebody tell me if this is feasible before I wear out another pencil?