I have a magnetic clip on my iphone case which I believe throws the compass off. Nearly every time I fly I have to first remove the iphone from the case and calibrate the iphone compass by twisting with short stops through the three axes of the phone. I always check that the direction on the...
If the branch that the drone is on is thick, you could use a slingshot to fire fishing line (using sinker on end) over the limb and then attach a high limb chainsaw (available from Forestry Tools) rope to fishing line and pull the high limb chainsaw rope over the limb, saw the limb off. Probably...
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