SmartSafe™ prevents unexpected motor startup when connecting the battery and
shuts off the motor if the signal is lost. Failsafe positions for all channels are
stored during binding. If the receiver is turned on before the transmitter, the
receiver will not output a signal to the throttle channel, preventing the ESC from
arming. When the transmitter is turned on and the throttle is placed in the low
throttle position, the receiver transmits a low throttle signal to the throttle
channel, allowing the speed control to arm. After connection, if the signal is lost,
the throttle will go to its preset failsafe position (low throttle), while all other
channels will hold their last command.
Spektrum receivers used in complex aircraft requiring many channels offer the
choice of a standard user-defined failsafe mode or SmartSafe.