Appendix
FailSafe configuration
"Ikarus OSD" considers two types of failsafe conditions. The type of failsafe condition depends
on the used receiver type. If the R/C receiver have not failsafe function, when loosing the transmitter
signal, it will not send any signal to the servos. On the other hand, if the receiver has failsafe function,
when not receiving any signal, it will sent to the servos the previously store failsafe signal. If your
receiver has failsafe, check the receiver instruction manual to set this default failsafe position.
Thus, depending on the used receiver type, Ikarus OSD should interpret these two types of
failsafe conditions. In case of not receiving any signal from the receiver, "Ikarus OSD" will
automatically enter failsafe mode, without requiring any additional configuration.
On the other hand, if the R/C receiver you are using does have failsafe feature, you must
configure it so that the OSD can distinguished it from a position normally received from the
transmitter. To do this, "Ikarus OSD" will perform a failsafe condition when it receive a position on the
control channel 100us higher than the maximum value set in the control channel travel. To do this,
follow these steps:
•
Place the control channel to the maximum value that allows the R/C transmitter. For his you
may have to increase the servo travel above the 100% value. Many R/C transmitters allow
you to configure a channel with values around 120% of what would be the normal travel of
the servo.
•
Memorize this position in the receiver failsafe. To do this follow the instructions provided
by the receiver manufacturer. Note that if you use an external stabilization unit (Copilot,
FY-20, etc.) it must also be configured so that in case of failsafe it active also
stabilization.
•
After saving the failsafe in the receiver, returns the transmitter to the normal settings at
which you will operate "Ikarus OSD”. Configure the appropriate mix if necessary to use the
special modes Mix223 and Mix224.
•
Calibrate the travel of "Ikarus OSD" channels to properly store the maximum minimum
travels of all channels, including the control channel.
•
From the "Ikarus OSD" flight screen, make sure that when turning off the radio, the screen
shown by "Ikarus OSD" changes to the one set for failsafe. Take care to prevent any
damage if the motor turn on by mistake when turning off the transmitter.
When "Ikarus OSD" detects a failsafe condition, automatically activate the autopilot, with
return home, interrupting the possible route that it was making. As an additional security measure, the
autopilot will never activate the motor when received GPS height is less than 20 meters above the
home altitude. This prevents that the motor is activated by error with the aircraft on the ground when
turning off transmitter by error.
© Ikarus Team Sevilla 2010
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