After connection
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 commanded position. When the signal
is regained, the system immediately (less than 4ms) regains control.
SmartSafe:
Prevents unintentional electric motor response on start-up.
•
Eliminates the possibility of over-driving servos on start-up by storing preset
•
fail-safe positions.
Establishes low-throttle fail-safe and maintains last-commanded control surface
•
position if the RF signal is lost. Note: Fail-safe positions are stored via the stick
and switch positions on the transmitter during binding.
Preset Fail-safe
Preset Fail-safe is ideal for sailplanes and is preferred by some modelers for their glow- and
gas-powered aircraft. With Preset Fail-safe, if the signal is lost all channels are driven to their
preset fail-safe positions. Here’s how Preset Fail-safe works:
Receiver power only
When the receiver only is turned on (no transmitter signal is present), all servos except for
throttle are driven to their preset fail-safe positions, normally control surfaces at neutral and
the landing gear down. These fail-safe positions are stored in the receiver during binding.
At this time the throttle channel has no output, to avoid operating or arming the electronic
speed control. In glow-powered models, the throttle servo has no input signal so it
remains in its current position.
After connection
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 Preset Fail-safe drives all servos to their preset fail-safe positions that were set
during binding.
For sailplanes, it’s recommended that the spoilers/flaps deploy to de-thermalize the aircraft,
preventing a flyaway. Some powered modelers prefer to use this fail-safe system to program
a slight turn and low throttle to prevent their aircraft from flying away. When the signal is
regained, the system immediately (less than 4ms) regains control.
Preset Fail-safe:
Prevents unintentional electric motor response on start-up.
•
Eliminates the possibility of over-driving servos on start-up by storing preset
•
fail-safe positions.
Establishes preset fail-safe servo positions for all channels if the signal is lost.
•
Note:
Fail-safe positions are stored via the stick and switch positions.
Standard Range Testing
Before each flying session and especially with a new model, it is important to perform
a range check. All JR aircraft transmitters incorporate a range testing system
which, when activated, reduces the output power, allowing a range check.
Range Testing
Press and hold the bind button
30 paces (90 feet)
