In the past few years, we have covered a bunch of robots that can haul a car and larger vehicles. The HyQReal quadruped robot takes it to the next level. As this video from IIT shows, this robot can pull a small passenger plane weighing 3300kg.
HyQReal measures 1.33m long, 90cm tall, weighing 130kg. It has 4 motors and hydraulic pumps, 2 computers (for vision and control), and a 48V battery.