User Manual

18 SPEKTRUM TELEMETRY

RPM/Speed Sensor (Electric)

In electric cars and trucks, the rpm sensor is mounted near the spur

gear and gets rpm readings directly from that gear. A conversion in the

handheld can be programmed to give speed in mph or rpm. See the

Handheld Unit section on rpm and speed for more details. A mount is

provided that allows the rpm sensor to be conveniently mounted in many

applications. Because of the diverse types of electric vehicles, it may be

necessary to fabricate a mount from Lexan for some types of vehicles.

RPM/Speed Sensor Installation (Electric)

• Determine the best method to mount the sensor near the spur

gear. The face of the sensor must face the side of the gear.

A mount is provided that can be taped in place using servo

tape then bent to allow installation in most applications.

• Mount the rpm sensor such that the sensor

is 1/8" from the side of the gear.

• If the gear is non-reﬂective, place a reﬂective decal on the gear

so it passes between the sensor and the ﬂywheel when rotated.

If the gear is reﬂective, place a ﬂat black decal on the gear so

it passes between the sensor and the gear when rotated.

• Plug the sensor into the R (speed/rpm) port in the telemetry module.