Castle Creations Thunderbird 54A, 15V BEC SPORT AIR BL ESC - 010-0053-00Affordable reliability All Thunderbird controllers are ready to fly straight from the package, no programming necessary. They are defaulted to AUTO LIPO detect and no brake. Should users wish to modify these settings, they may do so using their transmitter or with Castle? s incredible Castle Link USB Programming Kit (sold separately). Thunderbird 54: Large and in charge. The Thunderbird 54 offers gobs of power at an unbelieveable price. You simply