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Steel tie bars: one upper
Has a servo plug and plugs into the AR7200BX helicopter receiver providing RPM data for the governor
HPI Racing 113695 Main Chassis RS4 Sport 3
Optional 64mm springs for Rock Force
Spektrum SPM9560 Aircraft RPM Sensor / Bracket AR7200BX / AR7300BX 2.2 Tires Steel tie bars: one upperSpektrum SPM9560 Aircraft RPM Sensor Bracket AR7200BX AR7300BX Key Features Sensor for measuring motor engine RPM's in airplanes and helicopters Used in conjunction with the SPM9548 Telemetry Module, the Sensor Board and Sensor is used for measuring motor engine RPM's Plug and Play & includes 6" telemetry interconnect lead and bracket for mounting the sensor DualLink provides superior frequency path diversity High Quality Plastic Case Compact
