Thank you! Bitcraze is so small and lightweight, but the first version had 3 minutes of flight time. It have brush motors and it's not suited for outdoor. We'll update you about the real flight time asap the new motors arrive. Furthermore, ArduBee will be proposed as a plain board without motors and propellers, to enable every sort of selection and combinations of brushless motors and 3" props, offering full customization for many different approach, you can use top motors or under the base, for max endurance, max payload, max navigation performance or wind disturbance rejection.