PROFILE “NACA-6409”. Developed in the early 30-ies in the aerodynamic laboratory of the NAC (USA) for lifting aircraft-biplanes. This profile can be recommended as models of gliders championship class A-2, and RC models of gliders is a small scale.
PROFILE “NACA-6409 mod.”. Developed by us modelers as a modification of the previous one, especially for rezinomotornaya models championship class “spring prize”. In addition, this profile is recommended for models of gliders A-1.
PROFILE “GÖTTINGEN-417”. Developed during the first world war in aerodynamic laboratory in göttingen for aircraft-biplanes. It is recommended to rezinomotornaya models of gliders of the class A-1.
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