Compass Atom 7HV Ultimate - Manual (Page 17)

Tail Setup
Clockwise Position Counter Clockwise Position
At zero position, the servo arm should
be at 90°. Use the best fitting servo
arm and read the manual of your FBL-
Unit how to adjust the servo mid-
position.
90°
1
7
.5
1
7
.5
Adjust the linkage length so that the slider is
parelel to the tail case side wall.
It is important to limit the servo travel to the endpoints of the slider shown below. Too much
travel can cause a stall and lead to a loss of tail authority.
Set the limit of the tail servo to A from slider to
bearing.The table blow gives the value of A for
different blades and rotor head rpm.
With the tail pitch slider in this position, the
helicopter will turn clockwise. Set the limit of the tail servo to B from slider to
bearing.
With the tail pitch slider in this position, the
helicopter will turn counter clockwise.
The table blow gives the value of B for
different blades and rotor head rpm.
Adjusting the gyro direction:
To adjust the gyro direction, read the manual of your fbl unit. Look at the heli from behind.
When you turn the nose to the left (counter clockwise), the tail pitch slider must go towards the tail rotor hub
and away from the tail case.
When you turn the nose to the right (clockwise), the tail pitch slider must move towards the tail case and the
bearing.
Doule check this step!
A
B
Headspeed 1400-1800 Headspeed 1800-2100
Travel A Travel B Travel A Travel B
Stock Plastic 2mm 17mm 2mm 16.5mm
KBDD 104mm 2mm 17mm 2mm 16.5mm
Compass 115mm 3.5mm 16mm 4mm 16mm
Most CF 105mm 3mm 17mm 3mm 16.5mm