What happens if my A2 CofC expires during the time I am sitting the A2 CofC Renewal course?
Your A2 CofC certificate can expire during the A2 CofC Renewal course - as long as the course was purchased and started before the expiry date.
If this happens, you should not fly under the provisions of the certificate until you have passed the course and been re-issued with a new A2 CofC certificate.
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What is the fastest recharging method for DJI Power 1000 and the corresponding recharging time?
The fastest recharging method is through the AC input port.
What is the flight time of Flybotix ASIO vs Flyability Elios 2?
How do the payloads affect the DJI M400 flight times?
This depends on the weight of the payload / payloads. For example, 3 kg would make the max flight time 44 minutes.