I-19
This type of fail-safe is especially ideal for most types of electric
aircraft and is also recommended for most types of gas- and
glow-powered airplanes and helicopters. Here’s how SmartSafe
works.
SmartSafe
When the JR R1221 receiver only is turned on (no transmitter
signal is present) the throttle has no signal output. This
prevents the arming of the electronic speed control. In glow-
powered models, the throttle servo has no input so it remains in
its current position. All other channels are driven to their stored
fail-safe positions.
Receiver Power Only
After Connection
Failsafe for JR/Spektrum
Receiver Power Only
When the transmitter is turned on and after the receiver
connects to the transmitter, normal control of all channels
occurs. After the system makes a connection, if loss of signal
occurs, SmartSafe drives the throttle servo only to its preset
fail-safe position (low throttle) that was set during binding.
All other channels hold their last position. When the signal
is regained, the system immediately (less than 4 ms) regains
control.
Preset fail-safe is ideal for sailplanes and is preferred by some
modelers for their glow- and gas-powered aircraft.
When the JR R1221 receiver only is turned on (no transmitter
signal is present) all channels including the throttle have no
signal output. This prevents the arming of the electronic speed
control. In glow-powered models, the throttle servo has no
input so it remains in its current position. All other channels are
driven to their stored fail-safe positions.