cover plate on the propeller hub. This arrangement isThe electronic pitch indicator system also containsshown in view A of figure 3-11. The electronic pitcha stationary electronics cabinet, rotary transformer, andindicator receives an input from a sensor assemblyrotating electronics cylinder. The stationary electronicsmounted inside the propeller hub, as shown in detail incabinet is mounted adjacent to the OD box. It containsthe circuitry to provide a 10-kHz excitation signal to,view B of figure 3-11. The sensor (wand) extends fromthe small electronics package (handle) located in the huband receive a propeller pitch position feedback signalfrom, the rotary transformer. The cabinet also has twocone and cover into an axial hole drilled into the pistonlight emitting diode (LED) displays that show propellerrod. The hole contains a magnetic ring that allows thepitch in both feet and percent of design ahead and asternsensor to measure propeller pitch position.pitch. The rotary transformer contains both theFigure 3-11.—Hub-mounted electronic pitch position transducer.3-15
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