Preflight Check - Kavan ALPHA 1500 Bauanleitung

CHECKING THE CURRENT SET-UP
1. Assure that the transmitter is turned on (both the LEDs are on with the
T8FB), place all the trims in their neutral positions and set the throttle stick
into the lowest position. Connect the flight pack to the ESC - the red LED on
the receiver must glow. If it blinks or does not glow at all, the receiver and
transmitter require establishing their link by the binding procedure - refer to
the page 6 in this manual.
2. Checking the control surface neutrals
Please check all the control surfaces are in the neutral position if the corre-
sponding transmitter sticks and trims are in the centre position. If not, please
release the particular quicklink and set the control surface to the neutral po-
sition. The elevator and rudder has to be flush with the horizontal stabilizer
resp. the fin, both two ailerons have to be flush with the wing trailing edge.
Once satisfied, re-attach the quicklink to the control horn.
CAUTION: If the quick link got loose during flight, your model could become
partly or completely uncontrollable. Therefore, you should check the linkage
regularly.
3. Testing the Ailerons
A) Move the aileron stick to the left; (looking from the tail to the nose) the
left aileron must move up and the right aileron must drop down simultane-
ously.
B) Move the aileron stick to the right; the left aileron must drop down and the
right aileron go up simultaneously.
C) Return the aileron stick to the centre (neutral) - both two ailerons will re-
turn to the neutral position.
Note: If the ailerons are moving in the opposite direction, you will have to
reverse the direction by flipping the aileron reverse switch (AIL) on your
transmitter.
4. Testing the Rudder
A) Move the rudder stick to the left; (looking from the tail to the nose) the
rudder must move to the left.
B) Move the rudder stick to the right; the rudder must move to the right.
C) Return the ruder stick to the centre (neutral) - the rudder will return to the
neutral position.
Note: If the rudder is moving in the opposite direction, you will have to re-
verse the direction by flipping the rudder reverse switch (RUD) on your trans-
mitter.
5. Testing the Elevator
A) The elevator stick is located on the left side on the Mode 1 transmitter or
on the right side on the Mode 2 transmitter. Pull the elevator stick down; the
elevator must move up).
B) Push the elevator stick up; the elevator must move down.
C) Return the elevator stick to the centre (neutral) - the elevator will return to
the neutral position.
Note: If the elevator is moving in the opposite direction, you will have to
reverse the direction by flipping the elevator reverse switch (ELE) on your
transmitter.
6. Control Surface Throws
If you carefully followed the instruction in the previous sections of this man-
ual, the correct default control surface throws has been set automatically.
The control throws are set by the ratio between the length of the servo arm
and the control surface throw - the actual throws set this way are listed in the
column "Normal Rate" in the table below. (The throws are always measured
in the widest point of the particular control surface.) It is always better to try
to reach the requested throws mechanically, adjusting the arm/horn length
ratio - even if you have got a fancy computer radio. If you got such a transmit-
ter you can use the function "Dual Rate" (D/R) to get even more forgiving set-
up - please refer to the "Low Rate" column. You can also do it mechanicaly
- simply move the push rod Z-bends on the servo arms closer to the centre.
A. A radio featuring only one aileron channel
Control Low Rate
Aileron 8 mm up and down
Rudder 14 mm left and right
Elevator 8 mm up and down
B. A radio featuring 2 independent aileron servo channels
Control Low Rate
Aileron 8 mm up/4 mm down
Rudder 14 mm left and right
Elevator 8 mm up and down
*Expo – set to decrease the sensitivity around the neutral (Futaba, Hitec, Radi-
olink, Multiplex: -30/-20, Graupner: +30/+20 etc.)
7. Testing the Power system
KAVAN T8FB/R-30B: Check the throttle channel reverse switch (THR) is in the
"N" (up) position on the transmitter. Now perform the throttle range calibra-

PREFLIGHT CHECK

Normal Rate Expo*
12 mm up and down 30%
20 mm left and right 20%
12 mm up and down 30%
Normal Rate Expo*
12 mm up/6 mm down 30%
20 mm left and right 20%
12 mm up and down 30%
tion procedure as described in the KAVAN R-30B manual (refer to the attach-
ment) and check the motor brake function has been turned on.
A) Turn on the transmitter, set the throttle stick to the lowest position, con-
nect the flight pack to the ESC in the model (ESC has to be set to the "Brake
OFF" mode - if your ESC features this option). If the prop rotated slowly,
please check the position of the throttle stick and throttle trim.
B) Slowly move the throttle stick up, the prop should start to rotate clockwise
(looking from behind). If it spins in the opposite direction, pull the throttle
stick back, disconnect the flight battery and swap any two of the three
cables between the motor and the ESC. The re-check again. Repeat the
ESC throttle range calibration. Then re-check again.
Note: If the motor does not respond to the throttle stick advance, check the
model power cable connection and the state of charge of your battery.
CAUTION: Keep away from the propeller once the battery will be connected
to the model. Do not try to stop the propeller with your hands or anything else.
8. The Centre of Gravity
A) The CG has to be located 55-60 mm behind the leading edge of the wing.
Balance your ALPHA 1500 V2 supporting the wing with your fingertips 55
mm behind the leading edge for the first flight.
Default: Support your ALPHA
55 mm beyond the leading
edge of the wing
B) You can fine tune the CG position later to suit your requirements. Moving
the CG forward the model flight will be more stable, moving backward the
controls will be become more sensitive, also the thermaling performance
might improve slightly. Note: Moving back the CG too much could cause
your model would be hard to control or even so unstable that you would not
able to control it at all.
Now you are ready to fly!
4
55-60 mm