The Graupner Ultra Control 20A 3D has been designed for the more demanding control and response needed when flying 3D multirotor such as the Alpha 300Q. Manufactured with high-quality components and optimized software it only weights 15 grams (with cable). The Ultra Control 20A 3D uses the latest BL-Heli software and is currently the only flight controller using a 50 MHz Silabs processor. The powerful Silabs processor provides a higher clock rate therefore allowing higher maximum speeds and precise rotational timing. The special SO8 FET amplifiers are distinguished by their low internal resistance therefore providing higher efficiency and cooler operation. The Ultra-Low ESR capacitors guarantee high operational safety during superfast rotational reversals and fast startup. The high precisions resistors will guarantee accurate and consistent operations during motor starts in Damped Light mode.
The Graupner Ultra 20A 3D will automatically detect normal PPM and OneShot controllers. By default, the controller is optimized to utilize the Graupner GR-18 receiver and flight controller
The Ultra Control 20A 3D can programmed and updated with the Graupner USB updater (7168.6) using the BL Heli desktop software.
Max 4S LiPo
Operational Temperature Range
-10 ~ +55 Celcius
42 x 22 x 11mm
Instructions for programming and updating Graupner Ultra Control 20A ESC’s P/N S3056.MB – S3056 – S3057
BLHeliSuite. Download here
After downloading the BLHeliSuite which comes in an archive, install the files from the archive in a directory where you have access rights to.
The Graupner USB update board requires the Silicon Labs CP210x USB to UART drivers. Please note that in the latest windows 8 and windows 10 there is no need for installing those drivers. You can find those drivers here.