Tachometer, Victometer Centrifugal, 1920s USSR receiving ground signal from a

receiving ground signal from a selected transmitter via its loop antenna mounted top or bottom of the fuselage (see photo of an example of the loop antenna)

Likely made by Horn

dated Oct 29

This is an excellent specimen of the Contact Altimeter (Kontakt-Hohenmesser) Fl

Tachometer, Victometer Centrifugal, 1920s USSR receiving ground signal from aThis is a WWI or Post WWI vintage aircraft or laboratory tachometer "Victometer" made by the Jos W Jones Co. This is a centrifugal tachometer: as the rotation of the engine shaft rotates a cable attached to the case, flyweights rotate around an internal axis. The weights move outwardly due to centrifugal force, which pull a brace attached to the spring loaded pointer. As the brace is pulled by the centrifugal force of the weights, the pointer is