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Align T-rex 550X Dominator Super Combo (DS820/DS825 Servos)

Align T-rex 550X Dominator Super Combo (DS820/DS825 Servos)

Regular price $1,436.99 CAD
Regular price Sale price $1,436.99 CAD
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***Important technical notes: In order to connect a SRXL2 remote satellite like SPM4650 it is necessary to interchange the plus and minus wires (usually black & orange) of the 4-wire receiver connector. In the configuration below you can directly plug in the receiver without the need for an extra adapter. Never connect the 4-wire receiver connector to MICROBEAST PLUS in wrong polarity! This will damage your receiver immediately! Check polarity at least twice before connecting the receiver to MICROBEAST PLUS. It is up to you to make sure polarity is correct as Beastx or Rotorquest do not assume any liability in case you do it wrong.

The NEW T-REX 550X is definitely a significant leap forward in performance, enhanced by increased power, the integration of numerous innovative design changes, and lightweight improvements. The T-REX 550X performance is outstanding!

The brand new FL Flybarless Rotor Head System utilizes an extremely low CG design, reducing resistance during 3D maneuvers while increasing flight responsiveness and precision. A progressive design adds a gloss silver and red anodizing appearance which continue our quality development based on our 700 class helicopter. The T-REX 550X main frame utilizes composite material integration technology on carbon side frame plates, including the addition of battery mounting side rails, and a top motor mount design. In addition, the T-REX 550X’s lightweight design is 200~250g (Combo250g/Super Combo 200g) lighter than our pervious model, this effectively increase the power and improves flight time.

The T-REX 550X utilizes the powerful 730MX(960KV/4230) motor and our RCE-BL100A Brushless ESC which both are highly efficient providing superior power, improving the performance of the 6S power system. The NEW DS820/DS825 high voltage brushless servos are extremely efficient and out perform other servos in this class. To protect these servos the new high-end CNC aluminum case function as a heat sink allowing the servos to operate at a lower temperature.

With improved performance and increased power, as well as included top of the line electronic equipment. The new T-REX 550 X will arouse your enthusiasm and devotion to the T-REX Family.

Focus Shots

Standard equipment

  • RCE-BL100A Brushless ESC w/FAN x 1
  • 730MX Brushless Motor(960KV/4230) x 1
  • DS820 High Voltage Brushless Servo (aluminum and plastic arms incl) x 3
  • DS825 High Voltage Brushless Servo (aluminum and plastic arms incl) x 1
  • Microbeast PLUS Flybarless System x 1


  • Length:1163mm
  • Height:344mm
  • Width:196mm
  • Main Rotor Diameter:1248mm
  • Main Blade Lenght:550mm
  • Tail Rotor Diameter:254mm
  • Motor Drive Gear:16T
  • Main Drive Gear:112T
  • Autorotation Tail Drive Gear:131T
  • Tail Drive Gear:34T
  • Drive Gear Ratio:7:1:3.85
  • Weight(w/o power system):2590g


  • T-REX 550X DOMINATOR Set x 1set
  • 550 Carbon Fiber Blades x 1set
  • 95mm Tail Blades x 1set
  • DS820 High Voltage Brushless Servo (aluminum and plastic arms incl) x 3
  • DS825 High Voltage Brushless Servo (aluminum and plastic arms incl) x 1
  • RCE-BL100A Brushless ESC w/FAN x 1
  • Microbeast PLUS Flybarless System x 1

Radio transmitter and electronic equipment required for assembly

  1. Transmitter(6-channel or more,helicopter system)
  2. Receiver(6-channel or more)
  3. Pitch gauge or Digital Pitch Gauge
  4. 6S Li-Po 2600~5200mAh battery x 1