Tempo Cardinal - free flight motor timer for larger models
The Tempo Cardinal controls an Electronic Speed Controller (ESC) in models using 2-3s LiPo batteries. In effect, it replaces a conventional radio control receiver, allowing precise control over the motor power during (up to) 7 distinct flight phases. To use this device, you will also need either the Android app available here, or the dedicated programmer also available on this site - be sure to select the BLE programmer.