Carf-Models Ultra Flash, Instruction Manual

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Setting Up Your Flash
Depending on your turbine and battery choice, and
what accessories you use, your completed Flash
(dry) should weigh between 8.5 - 10 kgs dry.
Centre of Gravity
Set the Centre of Gravity at 360 - 370mm in front of
the back end of the wingtip tanks, with empty fuel
tanks and full hopper tank.
For first flights we recommend that you keep to the
forward end of this range.
Control Throws
To maximize the performance of your Flash we recommend that you use ‘flight mode’ settings,
if your transmitter allows. 3 flightmodes (takeoff, flying and landing) allow you to change maxi-
mum throws and expo-settings between the flight modes.
For example, in normal flight during aerobatic manouvers, the plane can use quite a high amount
of expo and qhite small max. throws, but during landing, with the flaps fully deployed, this set-
ting is not very suitable. So that you are not forced to compromise you should increase elevator
throw and reduce the expo to an almost linear elevator curve, and at the same time also reduce
the expo on your ailerons. With the 3 flightmodes you also make it easy to mix different values
of ‘down’ elevator to the flaps.
Flight Mode 1: Flap setting Zero for normal flight:
Aileron: 20mm up, 22mm down, 30 - 50% Exponential
Elevator: 18mm up and down, 30 - 50% Expo
Rudder: Max deflection, 10 - 20% Expo
Flight Mode 2: Flap setting “Take-Off” (Flaps: 15mm down at trailing edge)
Aileron: 20mm up, 22mm down, Expo 25-30%
Elevator: 25mm up, 18mm down, Expo 20-30%, 3 - 4% down elevator mix
Rudder: Max deflection, 25 - 30% Expo
Flight Mode 3: Flap setting “Landing” (Flaps: 65 mm down at trailing edge)
Aileron: 20mm up, 22mm down, Expo 20-25%
Elevator: 20mm up, 18mm down, Expo 10 - 20%, 2 - 3% down elevator mix
Rudder: Max deflection, 10 - 20% Expo
Important: For landing you must remember to rotate the nose up clearly to a positive angle-of-
attack to slow the plane down on final approach, as the wing has a fully symmetrical section and
will not generate sufficient ‘lift’ otherwise.
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Centre of Gravity