Composite-ARF SPARK Instruction Manual page 36

Composite-ARF SPARK
Inspect your batteries regularly to make sure they are not damaged, and have not expanded
anywhere. Be careful not to drop them or puncture the outer surface, which will damage them
irrepairably.
Certainly we strongly advise that you use a quality charger, and balance the Flight packs at least
every 2nd time that they are charged using a high-quality balancer with a safety cut-off.
We use the Orbit Microlader Pro (available from C-ARF as product #961200) and a pair of
Schulze balancers and charge the packs in series as a 10S cell. Quality balancers are available
from many sources, including Orbit, Graupner, Schulze, Emcotec etc.
Centre of Gravity:
Set the Centre of Gravity at 145 - 150mm
back from the front edge of the centre
section of the wing. At this position it
should balance slightly nose-down.
Don't forget to balance the plane lateral-
ly also, and if needed add a small weight
inside the light wing tip.
Control Throws:
All throw measurements shown below
are made at the root/trailing edge posi-
tion. We did not find it necessary to use
dual rates, but instead added some
exponential to all main flight controls.
These throws are not too sensitive, and
you can fine-tune them to your personal
preference after the trimming flight.
Elevator
Elevator throw should be about 16mm 'up' and 14mm 'down', with 30 - 40% exponential.
Rudder
Rudder throw should be about 25 - 28mm both sides, with 25% exponential.
Ailerons
Aileron throw should be about 13mm 'up' and 15mm 'down', with 40% exponential.
The reversed differential is to take into account that the hinge line being in the top skin instead
of on the centre line, so the aileron gets a little smaller as it moves down.
Setting Up Your Spark
36
techsupport@composite-arf.com
C of G range:
from front of wing at centre.
150mm
CENTRE of GRAVITY
145 - 150mm