Final Setup And Flying; Control Throws; Technical Specs - RC Factory Flash 3D aerobatic EPP Building Instructions

from the motor mount. If you are happy with the motor thrust line angles (there is 0° downthrust recommended and
the correct right thrust – cca 2° - is built into the backbone front end), use thin CA to permanently attach the
motor/mount assembly to the fuselage.
Diagram P
Install rudder and elevator control horns as indicated. Use sharp hobby knife to cut the appropriate slits and (thin
CA) glue the control horns into place.
Diagram Q
Note the recommended servo locations. The elevator servo is in the side wall of the backbone, right below the
carbon strip. Use sharp hobby knife to create the necessary slots. Use thick CA or hot glue to install the servos.
Make sure that there is a place for the receiver within the reach of all servo cables (so that no extension cables are
needed).
Diagram R
If you like the idea of pull pull cables (we do), do as follows:
On the side of the control horn, tie the line to the outer hole. Use small drop of CA to secure the knot and prevent
the (rather sharp edged) control horn from cutting through the line.
Locate the extension servo arms and (CA) glue the small white „beads" coaxially with the outer hole of the
extension servo arm. Drill through the outer hole using a 1,5 mm bit. Apply M2 screw cutting tap to the hole. CA
glue the extension arms to your original servo arms and secure with few threads of the kevlar line and a drop of CA
glue. Finally, thread in the included plastic M2 screw and use it to pinch the line in the right position and with
moderate tension. The line should lead around the outside of the screw below the servo arm first – please refer to
the diagram.

Final setup and flying

We expect that you know how to connect the receiver to the ESC and to the servos, the ESC to the motor etc. If not,
please refer to the respective instructions or better ask some more experienced friend.

Control throws

For "hardcore 3D" flying, use the full range allowed mechanically. For aileron, measure the max down throw and
set the up throw to equal amount.
For first flights and for less confident pilots, we recommend setting the throws to 60 - 75% of the maximum
amount. If possible, use also exponentials of 30 to 50%.
For first flights, your C of G should be 95 mm from the root chord leading edge. Attach your battery to the plane
using adhesive velcro tape for the first flights, to be able to adjust the CG easily. Set control throws at 60% of max
and 50% of exponential on all controls (if your radio permits). Check all systems and go fly. To trim the plane
correctly, the weather should not be too windy.. First, trim all controls coarsely to make the plane appear to fly
straight. You should need about the same amount of elevator for both inverted and normal flight. You may try
vertical power off dive to trim the neutral elevator.
Your aileron trim should be the same in normal flight and inverted. If it is not, you may have a lateral balance issue.
Try to move the battery pack sideways (say to the opposite side of the fuselage), if you can, to fix this problem.
After this, you should play with the thrust line to setup for clean and effortless hover without any tendency to "pull
out" to any side. This may take a while and require quite a few tests. The thrust line can be changed by inserting
thin washers on the screws holding the motor, between the motor mount and the motor.
Next thing, the center of gravity. We prefer the plane to fly almost "hands off", just the slightest bit of elevator
needed for level flight. Move the C of G vertically (by moving the battery pack) to get a perfect knife edge without
any tendency to roll.
For clean rolls, without any coupling to yaw, you may want to play with aileron differential (different up and down
deflection of ailerons).

Technical specs:

Wingspan
Length
AUW
Motor
Servos
Battery
Have fun! Your RC Factory team.
1000 mm
1000 mm
380 – 460g
120 – 150W outrunner type (Hyperion 2213/20, Axi 2212/26, HCS 150W etc)
4pcs of 9 – 12g servos of good quality
Lithium Polymer 650 – 1200 mAh 3s