We used props that just barely did not clear and flew for just under 15 minutes on a stock pack. After landing there were chips in the ends of the blades. We also flew it up to 5000ft on multiple occasions, but we didn't time it. We used telemetry to tell when the pack was low. Those must have been pretty lengthy flights, seeing how my neck was sore after staring straight up for however long. We have yet to fly it with a bigger battery than stock. I don't know exactly how much more battery you can carry if you add a GoPro though.

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