CoaX (tm)
Robotic coaxial helicopter built for research and education


The Coax helicopter is an open, cost-effective and easy to use system. Educational applications include' autonomous navigation, non-linear systems, system linearization, frequency domain analysis, estimation theory, Hardware in the loop (HIL), multivariate systems control dynamics modeling and identification.

  • 2 x dsPIC133, one for sensor data-fusion and one for control and communication
  • Two brushless motors for the main rotors and two servo moters for the swash plate-based steering
  • Control system through open-source API to give high-level commands
  • Simulate algorithms on ODE or Simulink simulators, and use exactly the same code to control the real helicopter

Rotor Span 340.8 mm (13.4in)
Size Height 168.4 mm (6.6 in) Width 165.1 mm (6.5 in)
Weight 280g (9.8 oz.) Basic configuration
340g (12 oz.) Full configuration
Run time Up to 20 minutes/charge
Max. Height 6 m (19.6 ft) if only the on-board sonar is used.
Up to the user if the pressure sensor is used.

Basic Package
  • 2 x dsPIC (dsPIC equals DSP + PIC)
  • Inertial Measurement Unit (IMU)
  • Pressure sensor (altitude)
  • Sonar (altitude)
  • Bluetooth or XBee* module
  • Remote control (2.4 GHz)
Optional CoaX(tm) Package Includes
  • Gumstix Overo 600 MHz
  • WiFi Communication
  • Camera
  • Linux OS
  • IR sensor (Lateral distance)

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