Carf-Models Ultra Flash, Instruction Manual

Page: 31 / 44

R/C and Gear Installation
There is plenty of space in the cockpit area to make a really nice neat gear layout, but still with
easy access to everything. Included in the kit are cnc milled plywood plates for the Receiver,
Rx switch and retract/brake valve on the right side of the cockpit - and another for the Turbine
ECU, solenoid valves, etc., on the left side. The layout shown in the photos in this manual and
on the photosheets is our suggestion, and has proved to
work very well, but of course it is your choice exactly how
and where you wish to install the main components.
However, we would recommend that you keep the turbine
equipment, and especially the ECU and fuel pump, as far
away as possible from the Receiver. Likewise, please route
all the electrical cables from the turbine, especially the
power supply for the glow-plug or kerosene starting system
and the electric starter on the opposite side of the fuselage
from the extension leads from the stab and rudder servos.
Photos P21 thru’ P24 should give you a clear idea of our
suggested layout and equipment. Both milled gear plates
are secured with a pair of M3 bolts that screw into T-nuts
under plywood blocks or strips glued across the bottom of
the cockpit area. Modify the plates to suit you equipment
as necessary. Included in the hardware pack is enough
double-sided velcro strap to secure the batteries, receiver
and turbine ECU in the milled slots provided.
The Powerbox ‘Sensor’ switch is a superb and very reli-
able unit, and we use this in all our planes that do not have
‘Powerboxes’ in them. It combines 2 independent linear volt-
age regulators with 2 separate ‘fail-on’ electronic switches
for connecting 2 separate (5 cell NiCD or NiMH) or 7.4 volt
Lipo batteries to your receiver. Likewise the combined
mechanical retract & brake valve included with the Behotec
landing gear has proved very reliable, efficient with use of
air, and simple to set-up.
But perhaps the innovation that most people will like when
doing the gear installation in the Flash is the ‘Battery-
pockets’ either side of the nosegear unit. Perfectly posi-
tioned you will need no added lead to set the correct
Centre of Gravity when using normal sized Nicads or NiMH
cells in here. No more scraped and bleeding fingers from
squeezing batteries into the nose area and packing them
in with foam!
Plenty of room for two 5-cell NiCads or NiMH receiver
packs on one side, and a large ECU pack on the other
side - as well as the usual-sized propane tank. And if you
prefer to use LiPo or Li-Ion cells it’s easy and quick to
remove your packs from the model for safe charging. With
a JetCat P120 turbine installation, you will find that the
29
(above) ECU and RX plates are
fixed with M3 bolts into T-nuts
under a ply strip and 2 blocks
glued into cockpit floor.
(below) Fuel pump is secured to
milled ply mount with cable-ties,
and glued under tank support.
(below) Excellent Behotec com-
bined retract/brake valve installed
on supplied milled ply mount.