Carf-Models Composite-ARF Extra 300L Instruction Manual page 31

Composite-ARF Extra 300L (2.12m/84")
Elevator
Low rate should be no more than 30mm
(1.25") both sides. This is the perfect throw for
nice and crisp snaps. If you like you can add
about 20% exponential to the low rate setting.
On high rate the elevator should really be at
maximum, up to 50 degrees both sides, but in
this case with at least 50% exponential, and
this hi-rate setting is definitely for 3D only !
Rudder
Set the high rate to maximum throw (about
150mm) both sides, and at low rate reduced
to about 90mm. The Extra needs quite a lot of
rudder for nice stall turns, so you should at
least add 25% exponential for smooth track-
ing corrections.
At the same time you should remember that
the Extra rudder is VERY sensitive, and the
plane starts shaking at high speed if the rud-
der linkage is not really rock solid, so check
your closed-loop cables again and make sure
that there is NO slop at all ! On the
other hand these characteristics are
also the reason for best rudder sensi-
tivity at the slowest 3D-speeds.
Ailerons
Aileron throw for high rate is 55mm up
and down. Use at least 30% exponen-
tial for high rate. For low rate you
should decrease the throw to the top
to 32mm, and the bottom to 35mm.
Yes, this is a reversed differential due
to the hinge line being in the top skin
instead of on the centre line. You will
have to finalise this differential figure
during flight, as mentioned earlier in
this instruction book. At high rate, for 3D manoeuvres, this doesn't effect the rolling too much, so
you can maximize the throws to whatever is mechanically possible, even more up than down if
you wish.
In General
Your Extra has very large control surfaces, which makes it very sensitive and reactive. It is
always possible that these huge control surfaces can flutter at high speeds if the assembly, servo
installation and linkages are not made perfectly. So please do yourself a favour, and make sure
that you only use the best servos available, and take the utmost care making your linkages.
Check every linkage for slop, and set up all your linkages to give the maximum mechanical
advantage and correct throws - rather than reducing the throws electronically in your transmitter.
techsupport@composite-arf.com
ELEVATOR THROWS
RUDDER THROWS
AILERON THROWS
31
high rate: 90mm (max.)
low rate: 30mm
low rate: 30mm
high rate: 90mm (max.)
high rate: 150mm (max.)
low rate: 90mm
low rate: 90mm
high rate: 150mm (max.)
high rate: 55mm up
low rate: 32mm up
low rate: 35mm down
high rate: 55mm down