. Capstan drum concept that allows the user to pull his load over an unlimited length of rope, without loss of power, in a simple, efficient and safe way. . 2 speed options with interchangeable capstan drums. You can choose the one that is best suited to your task. The 57mm diameter drum, fitted as standard on the winch, gives you full power, with a pulling speed of 12 metres per minute. For more speed, the optional 85mm drum (PCA-1100, sold separately) will give you a 50% higher speed of 18 metres per minute. Pulling force of 1000 kg without mechanical advantage. By adding a pulley system, you can increase the pulling force by up to five times (5x). This means that with two double pulleys you could pull up to 5000 kg!