With the Castle, to engage the brake, you need to have the throttle low enough. If the motor is idling, the brake is not active.

I have my low throttle endpoints set such that I have the minimum idle with the throttle trim in the middle, and brake engages at anything less than mid throttle trim.

I have a three position switch (thr>thr mix, with offset to only affect low throttle) that does nothing in the center position, adds several hundred RPM in the high position, and engages the brake in the low position. I normally fly with the brake engaged, except on very windy days when I want to keep speed a little higher. The idle up is nice for spins and stall turns....keeps the tail from "going dead".

The exact lowest idle RPM will depend on the motor......some outrunners will be as low as 300 RPM, while the geared NEU F3A motor is about 700 RPM. When the brake is engaged, the ICE logging will show the idle as zero, and an Eagletree with electrical RPM tap will show the idle as zero. This is because the brake when actively is essentially shorting the windings of the motor.

Regards,

Dave Lockhart
Team Horizon / JR / Spektrum, Team Castle Creations, Aero Tech