GRAUPNER mx-12 Hott, Programming Manual

Page: 185 / 200

185
Programming example: F3A model
“FAIL-SAFE settings”
We strongly recommend that you make use of the safety
potential of this option by at least setting the throttle
position (glow-powered models) to idle, or the electric
motor to stop, if a fail-safe event should be triggered.
This simple precaution ensures that the model is much
less likely to create havoc and cause property dam-
age or personal injury. If you also program the fail-safe
positions of the control surfaces in such a way that the
model flies steadily descending circles in case of inter-
ference, then you have a good chance that it will land
relatively gently even if the radio link fails for a protracted
period. This also gives you plenty of time to restore the
connection, should the whole 2.4 GHz frequency band
suffer interference for a while.
In the receiver’s default state, however, the servos
remain in their last valid position (“hold mode”) when in-
terference occurs. You can program any individual servo
output of your receiver to a “fail-safe position” (fail-safe
mode), as described on page 136.
Summary
The settings described on this page are intended
primarily for the expert flyer. Please bear in mind that
refining the flying characteristics of a model aeroplane
to this extent involves tremendous effort, time, sensitivity
and expertise. Some experts continue the program-
ming procedure even when they are flying, although it
is not advisable to try this if you are just a moderately
advanced pilot making your first attempt with an F3A
aerobatic model. You would be well advised to request
help from an experienced pilot, and carry out the fine-
tuning adjustments mentioned here one by one, with the
expert at your side, until your model exhibits the neutral
flying characteristics you desire.