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Composite-ARF Extra 330L (2 x 2m)
techsupport@composite-arf.com
Electric Power
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If you are fitting a gas or glow motor, skip to page 31
Our 'Electric Power' Option pack includes all the main bulkheads and battery support parts
required to install either the Plettenberg Xtra 25-13 motor, or the Hacker 50 geared unit, both
powered by LiPo batteries. Considerable flight testing and demonstrations have been carried out
with the Hacker, which is the most powerful of these 2 units, and we can highly recommend this
combination.
The 'Electric Option' pack includes bulkheads and parts to install both
Plettenberg Xtra 25-13 or Hacker C50 geared units.
Hacker 50 (Geared 6.7:1)
A Hacker 50, fitted with an APC E22 x12 pro-
peller and LiPo cells (as shown here) is the per-
fect match for this plane. 'Prop hanging' needs
only about 40% throttle, and the plane will accel-
erate straight up from that with ease. Flight
times are an easy 8 or 9 minutes, depending on
your schedule. The Speed Controller used is
Hacker's own Master 0-90-Acro unit, which per-
forms very well and gives nice throttle response.
The batteries used were a pair of 'Thunder
Power' 6000 mAH Lipo's, connected in series,
which give about 9+ minutes duration. The com-
plete motor/battery/speed controller combina-
tion weighs just under 2kg.
We did not use a BEC unit with this set-up, preferring a separate Rx battery (1400 mAH 5-cell),
which was needed to achieve the correct Centre of Gravity anyway.
The speed controller was fixed on a ply plate above the LiPo's, behind the motor and secured
with double-sided foam tape and a cable-tie. Make sure there is enough cooling airflow over the
heatsink.
The photos show how the 3 bulkheads are installed. The front of the motor is mounted to the
25
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