Composite-ARF SPARK Instruction Manual page 7

Composite-ARF SPARK
This is a list of the things you may need to get your Composite-ARF EDF-powered Spark into
the air. Some of them are mandatory, some of them can be chosen by you. What we list here
are highly recommended parts, and have been thoroughly tested.
1. DS-75 EDF unit, Lehner 2240-15 motor & 100 Amp speed-controller
We strongly recommend that you use this EDF unit as the Spark is totally designed around
it. It is available as an option from C-ARF, and comes fully wired, balanced and tested -
and packed with the Jeti Spin 99 controller. (Product #864003).
2. Flight batteries. We recommend two 5S Lipo packs of minimum 5000mAH, with maximum
dimensions of 165 x 45 x 60mm, and max. weight 675 grams each. A pair of high-quality
HDHE Lipo packs of 5200mAH is available as an option from C-ARF (Product #865001).
3. Spring-Air 301 'Firewall' retractable landing gear set. The Spark was designed around this
economical, lightweight and reliable gear, and it is available as an option from C-ARF.
(Product #740500)
4. Servos (min. 8). We recommend JR DS3328 or 3301's for the elevators, ailerons and rud
der. Due to the slim section of the stabiliser it is necessary to use a max.15mm thick servo
with an integral wing-mount bracket. An alternative for the elevators is the JR DS161 or
DS168 servo which also incorporates wing mount brackets. The speedbrake requires a
standard sized servo with minimum 5kg torque (eg: JR 5391 or 8311). We used a JR3341
for the nosegear steering. The retract/brake valve can be controlled with any small servo
of minimum 2kg torque - such as a JR3341 or JR331 micro servo.
5. 5 heavy duty plastic servo output arms (single-sided), for the aileron, elevator and speed-
brake servos. (eg: Graupner # 3544 or JR # 0315)
6. Main and Nose wheels 55 - 60mm (2.25 - 2.5"). You can use any high quality plastic
wheels. An optional set of Behotec 'slim' wheels, designed specially for the Spark is avail
able from C-ARF (Product #740550). The set includes 3 dual ball-raced wheels @ 60mm
diameter, 3 bolt-on axles, 2 brake units and a very compact combined retract/brake valve.
7. Receiver battery. We recommend a 2S Lipo of around 1500mAH, as the Spark only draws
about 80 - 100mAH per flight from the small servos.
8. Switch for Receiver battery. We highly recommend the Powerbox Digi-Switch for a 2S 7.4
volt Lipo, or the Powerbox Smart-Switch if using a NiCD or NiMH pack. The Digi-switch is
available from C-ARF as an option (Product # 960610)
9. Charger & balancers for Lipo Flight batteries. (eg: Orbit, Schulze, Graupner, Emcotec etc)
Suitable large cross-section charging cables with Ø 4mm gold connectors.
10. High quality servo extension cables, with gold connectors.
Accessories
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