Brake on or off wont make any visible difference with EDF unless your motor has so little cogging that you can spin the rotor by blowing on it. Brake wont affect glide speed unless the EDF is huge. My EDF's stop dead even with brake off when I close the throttle, due mainly I think to the strong cogging action of Hyperion motors. My other EDF's with small 2030 chinese motors spin freely and make little difference to the glide speed whether braked or not.