Ok Ok I know pretty feeble compared to most people but I managed a flight of 8750 feet or 2.667km or 1.66 miles. I was very impressed with this. Totally standard setup. Quite a noisy signal area as well. I started to get video signal weak warnings a few times - I climbed higher but was still getting them at 350' so chickened out and brought her home. Was pretty windy anyway and speed over ground on return was only 15mph! Landed with 39% battery anyway. Now the question is do I go for a DBS mod or a windsurfer???