Compass Atom 7HV Ultimate - Manual (Page 19)

If you have vibrations it is better to find the source than using a softer tape. All wiring to the FBL-Unit must be
done without tension and not to stiff. If you use some kind of cover to protect the wires, please remove it on the
last 3-5cm to make sure that vibrations can’t be carried to the unit – which will cause strange behaviour like
unwanted movements of the helicopter.
Remove all kind of grease and oil from the radio tray and the bottom of the FBL-Unit with alcohol or something
similar.
Please place your FBL-Unit extremely carefully in your helicopter. It is important that the unit is in a perfect 90°
angle to all axes to get best performance. A wrong mounted unit can cause a wobble during piro-manouvers.
FBL Setup Tips
Tip: For easy measurement of the pitch angles
during the setup, please use something long
and straight (like a flybar or CF-Tube) and put it
on the upper servo mount behind the servorods.
With this trick you can easily use the pitchgauge
to check the collective and cyclic angles.
Tip: All servo horns must be at 90° (horizontally). Try all
possible positions of the servo horn to get as close as
possible to 90° at neutral servo position. Keep all
swashplate linkages at exactly the same length. Level
the swashplate horizontally in all directions, therefore
read the manual of your FBL-Unit and follow the
instructions!
Please read the manual for the current
software version of your FBL-Unit carefully
and follow all instructions. We can't give
you any specific tips because most brands
of FBL-Units change their software from
time to time and your setup depends on
many other factors like used blades and
servos. Please check our website to find
some setups from our Teampilots.
A perfect CG (Center of Gravity) is very important to get a perfect flying model. The CG must be
exactly under the mainshaft. Adjust the CG by positioning the battery to the front or to the rear on
the battery tray. You can also change the position of the battery tray with the three mounting holes
in the side frames. The CG should be measured with all parts including the canopy.
Tip: There are two methods to find out where the CG is. The first method is to hold the model under the main
blade grips and look if it tilts forwards or backwards.
You can also hold the model at the main blade grips and fixed main rotor blades with the main shaft
leveled horizontally. Look with the canopy facing to the right and then facing to the left (due to the free
wheel) if the nose or tail tilts down.
If the nose tilts down, you have to put the battery more to the rear, do the opposite when the tail tilts
downwards.