The Graupner Ultra 20 A SBEC is the ideal controller for any
airplane in need of a small footprint and lightweight ESC. The ULTRA 20 A SBEC
combines a compact design, low weight, fast response times, 5.3V 3A switching
BEC and optimized settings for airplanes.
The Ultra controller is based on the Open Source BLHeli Main
software 14.x. The ESC hardware is designed around the advanced 50 MHz Silabs
processors ensuring high efficiency, precise timing and fast response times. The
amplifier is housed in a 5 x 6 DFN package. The field effect transistors (FET)
have an extremely low internal resistance (<1.5 mOhm). Special FET drivers
provide a more effective active recovery and better cooling for the amplifiers.
The ceramic capacitors used allow super-fast start-up times and guarantee high
The Ultra ESC can be programmed and its firmware updated with
the Graupner update cable 7168.6 and the BLHeli software desktop software (this
ESC cannot be programmed over a HoTT radio)
It has built in telemetry for measuring the main battery voltage
using a voltage divider. The additional voltage sensor cable allows the voltage
measurement and telemetry warning with the GR-12, GR-12 SH, GR-12 SH or Falcon
12 gyro receiver connected to CH5 or on the GR-16/GR-16L on channel 6 and GR-18
on channel 9.