Inside Out Library · ExploreAeronautic Instruments. Section III : Aircraft Speed Instruments (1923)NASA Technical Reports Server (NTRS) · leaf 16Fig. 23.—Eteve air-speed indicatorNASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from Aeronautic Instruments. Section III : Aircraft Speed InstrumentsMore like this
