Tachometer, Victometer Centrifugal, 1920s USSR made by Bendix and labeled

made by Bendix and labeled for engines #1 & #2 and 3 & #4

dated Oct 29

The knob was used to set the flow rate

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)

Here is an engine Torque Pressure Indicator

Tachometer, Victometer Centrifugal, 1920s USSR made by Bendix and labeledThis 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