I have a JetCat P-220Rxi in mine. These are actually around 230N thrust, there are a few Weston Park videos of me flying with CARFs own KT 260 version…there is hardly anything in the speed of the two models. I have also flown against JetCat P-250 versions, again straight flight nothing in it…they might have been out dragging me on long vertical climbs, but it was minimal.
Highest GPS speed I have seen on mine was just over 300mph and that was not a full on max speed test. Real world the Bolt and Ultra Flash can be into the 290-300mph range