# How do i find a supercritical airfoil for my preliminary design?

The following information is available but i don't exactly know where to get the information about SC Airfoils from. Do Airbus , Boeing use secret airfoil that they don't disclose?

Cruise Speed = 240 m/s or 0.7 Ma; Chord length = 5.5 meters Using online tool to get the Reynolds number gives a very high number of about 85 million. Using the standard setting for kinematic viscosity of $$1.4207E-5$$.

1.How do I find a SC airfoil for a transport jet of about 150 Pa @ 0.7 Ma?

2.Why are my Reynold's number so high? It should be around 25-30 Million.