Composite-ARF SPARK Instruction Manual page 25

Composite-ARF SPARK
Speed-Controller
The 'Jeti Spin 99' Speed-controller is mounted
right at the back of the cockpit as shown, on top
of the ducting, and it is also used to secure the
fibreglass Inlet joiner to the inlets, as the inlet
joiner is not glued into the plane.
Please read the 'Cooling' section later in this
manual before installing the speed-controller, as
it might affect the exact mounting of it - depend-
ing on the ambient temperatures that you will
operate your Spark in.
Make up the 3 small 6mm thick mounting blocks by gluing short lengths of the 3mm Liteply strip
together with thin CA, and sand to shape to fit on the ducts. Secure the controller to the 3 blocks
using the 2.9 x 10mm sheetmetal screws thru' the rubber mounting grommets.
Sand the gluing areas on both duct parts, and then glue the complete assembly in place using
30 minute epoxy and micro-balloon mixture, keeping it exactly central in the cockpit opening. Of
course you should have the fan unit installed and fixed in position while you do this to ensure
correct alignment of the Inlet joiner. See photos on page 28 and 29.
* Please see the 'Cooling' section on page 27, 28 and 29 for details of the air vents and cutouts
needed for cooling the speed-controller.
Flight Battery Installation
The Lipo Flight batteries are the
heaviest item in the plane, and
must be fixed very securely, as
they will weigh several times their
actual weight under 'G' forces.
This EDF system
designed to use a pair of 5S
packs of approx. 5200 mAH, as
shown here, and these are avail-
able from us as an option (product
#865001). Of course you can
choose your own packs, which
might be a different size or shape
to the ones shown - and in that
case we advise you to follow the
basic design principle shown here
if you make your own battery tray
and supports.
The 5200 mAH packs shown
weigh 660 grams each and, when
positioned as shown, the Centre
used is
(above) View of the completed dual Lipo Flight battery
installation. The 2 wires with yellow heatshrink on them are
joined together to 'arm' the system ready for flight.
techsupport@composite-arf.com
25