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D9 - RADIO - My radio does
not have an Idle up setting - what goes on ?
The Idle up switch
is one of the most important
switches that every radio should provide. As it's name
implies, it sets the throttle and pitch curves to a special and
different set that are usually used for flying circuits and
aerobatics, but can quite usefully be used for hovering as well.
usually the most basic types, do not offer an Idle up set of curves,
so you are limited to the single curves provided in the radio.
majority of radios however this switch is provided. On the
basic radios, both sets of curves are set in the radio, and you
cannot change them, which is not the best solution by a long
way. The Esky stock radio is the worst culprit at this, as the
Idle up switch instantly sets the motor speed to about 85%, which
means that if your throttle is fully closed when you throw the Idle
Up switch ON, the motor spins up to high speed very quickly, which
most of the time means that the teeth on the main gear are stripped
straight off. To counter this always wait until the
throttle is up to around 50% before switching to Idle up with that
type of radio.
expensive computerised radios allow you to configure the curves to
be used with the Idle Up switch, and most often the ESC used proves
a good super slow spool up option to overcome the main gear
The benefit of
using Idle Up is that once the motor and head are up to speed, that
speed does not vary, as it does in normal mode, so maintaining the
same altitude is very much easier.
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