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Bask Aerospace
AeroDrone MR4 - Getting Started Guide
If the connection is lost between the remote controller and the aircraft, the RC fail-safe is triggered. Once
triggered the aircraft will initiate RTL mode, returning to the home location and landing automatically.
Even if the remote controller and the aircraft regain connection, the aircraft will remain in RTL mode unless the
pilot overrides this. To override the RTL command, simply toggle the RTL Switch on the remote controller ON and
then OFF again.
4.3.2. Battery Failsafe
The battery fail-safe helps protect you from a scenario where the aircraft runs out of battery power while still flying.
It’s also used to help ensure the battery is not damaged by discharging it too much.
The battery fail-safe will trigger based on two limits. In both cases, the aircraft will initiate RTL mode, returning to
the home location and landing automatically.
Low Voltage Limit
When the battery voltage reaches the predetermined minimum voltage. This should be set to the minimum
voltage of your battery based on its number of “cells”. Below is a table showing number of cells and minimum
voltages;
Min. Battery Voltage
3 Cell
10.2V
4 Cell
13.6V
5 Cell
17.0V
6 Cell
20.4V
Low Capacity Limit
When the remaining capacity in the battery reaches a predetermined minimum. Usually this is set to allow at least
20% remaining battery capacity when the fail-safe triggers but can be set higher or lower if needed.
For example; if your battery has a capacity of 5000mAh, you would set the low capacity limit to 1000 (which is
20% of 5000).
When setting this parameter it’s important to think about what sort of flying you’re doing and when the fail-safe
could be triggered. Remembering that the percentage you allow for with this parameter is how much battery
capacity the aircraft will have to return back to the Home Location.
Whenever you disconnect and reconnect a battery to the aircraft, it will assume the connected battery is fully
charged (even if it’s the battery you just disconnected). If this happens with a battery that has been used
previously, the Low Capacity Limit will fail to work correctly. For this reason, it’s good practice to always connect
a fully charged battery.
4.4. Status LED
The status LED located on the back of the aircraft gives you a simple and easy to see indication of the
health/state of the aircraft.
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