Manual

Radiolink Electronic Ltd
www.radiolink.com
13
weather, pilots need to continuously correct the rolling and pitching angle to keep the aircraft at
the same position.
2
Pilots use the rudder stick to control the turning velocity. When the rudder stick is loose,
the aircraft will keep the direction.
3
Pilots use throttle to control the average rotation rate of the motors and need to
continuously toggle the throttle to remain the aircraft at the certain height. The throttle input will
automatically change according to the aircraft inclination to cohere with height change brought
by the aircraft inclination, eg. If the inclination angle is too big, it will automatically increase.
2.1.3.2 Alt-Hold Mode
At Alt-Hold Mode, flight controller will automatically control the throttle to remain the height.
The operations of rolling, pitching and rudder are to directly control the turning angle and
direction of the aircraft, same as Stabilize Mode.
Comparing with Stabilize Mode, the Alt-Hold Mode is easier to control because the aircraft
will remain at a certain height if the throttle stick is at the central point after pilots toggle it over to
lift. And they only need to toggle the rolling/pitching stick to make the aircraft move
(forward/backward/left/right), which is easier for beginners to practice.
WARNING! Flight controller takes the test result made by barometric altimeter as the height
base. If the pressure changes, the height could possibly be incorrect, which is not the actual
height. Unless the ultrasonic module is installed to detect the distance and the flight height is less
than 20 feet. Ultrasonic sensor can detect flight height more accurately if less than 26 feet.
Stick Operation at Alt-Hold Mode
Throttle stick is to control the rising and descending velocity of the aircraft.
Aircraft remains the height when the throttle is held at middle point (between 40%-60%)
If the throttle is toggled out of this range, the aircraft will be up or down to varying degrees.
The max distance of rising or descending is 2.5m/s.
Take-off at Alt-Hold Mode
At Alt-Hold Mode, only the throttle stick is pushed over the central point can the aircraft be
lifted. When the aircraft reaches certain height, toggle the throttle stick back at the middle, it will
remain at the same altitude.
Landing at Alt-Hold Mode
At Alt-Hold Mode, toggle the throttle slowly to the bottom to land the aircraft. Once landed,
the motors won’t stop immediately. If pilots disarm the aircraft immediately by pulling the