Featherweight motors built with a watchmaker’s precision are being turned out by the hundreds to contribute important parts in the safe operation of American warplanes. Weighing but seven ounces each, these tiny Autosyn motors are accurate within 1/10,000 inch. Their function is to tell the pilot of the position of various moving parts of the plane, and as many as 20 may be installed in one ship. They work in teams. For example, one transmitter motor operating on a 27-volt, 400-cycle alternating current is attached to landing gear and also to a receiver motor which is attached to a dial on the instrument panel. The slightest movement of the landing gear actuates the rotor of the transmitter motor, which causes a similar movement. of the receiver rotor and thus moves a needle on the instrument board, showing the pilot the exact position of the landing gear. Similar installations register various other phases of the plane’s mechanism.