Stalls and Curtis' airfoil patent

[gbmmoyair]

Curtis' airfoil patent (to always have the forward wing stall first) appears to apply only to the symmetrical airfoils. I was wondering what about the S1-C with M6 airfoil - are the upper and lower airfoils the same? Does the forward wing on the S1-C always stall first when inverted? And what about some of the other non-Pitts bipes, like Smith Mini or Starduster? Does the forward wing always stall first when inverted? If it doesn't, what are the consequences? Is it dangerous?

thanks,
Livia
Starduster One

 

[Wade]

 

[acropilotbret]

 

[TFF1]

 

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