Sphere drag tests in the variable density wind tunnel

Eastman N. Jacobs
naca-tn-312
Aug 1929


The air forces on a twenty-centimeter sphere were measured after it had been rebuilt as an open throat type. The results from tests made at widely different densities and airspeeds and also on a smaller sphere are given.

An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1929/naca-tn-312.pdf