New World Record RC Airplane Speed 548mph

The new hotness right now is dynamic soaring across the heliopause with a solar ion 'wing.'[0] Supposedly this can achieve 2% c , in the same way RC gliders use dynamic soaring to achieve speeds far in excess of the wind speed.[1] [0] [LINK] [1] (headphone warning) [VIDEO]

> did not land, did not eat, did not drink and did not stop flapping My understanding is that these incredible distances are achievable less by "flapping" and more by leveraging small adjustments to harness the incredibly powerful forces found among and between air currents and waves as they traverse across the ocean. For example, here is an unpowered remote control glider achieving measured speeds of 548+! mph using nothing but natural energy harnessed from wind and gravity. [VIDEO] [LINK]

You can also extract energy by moving between two fluids in relative motion. If you count that as sailing, this is the fastest sailing vessel. [VIDEO]