But at what power/weight ratio? My point is that right now, 4" has just gained the advantage in power/weight ratio.
[USER=113]@CheFPV[/USER] This has only occurred in the last month or two, so it has not trickled down to results and adoption by racers yet. But unless the 20mm ESC's can really handle a 5" tri-blade prop, they won't gain back their previous advantage. I wonder how it would go today if you have those conversations again and see what they say now (if they have a recent 4" ultralight build).
