English: A diagram with multiple synchronous machine curves: open-circuit curve, short-circut curve, zero power factor. Curves were taken by NASA using a modified brushless, stationary-coil Lundell alternator.
The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain.
The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2]
Uploaded a work by David S. Repas, Richard A. Edkin from NASA TN D-5405 https://ntrs.nasa.gov/api/citations/19690026159/downloads/19690026159.pdf with UploadWizard
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