How Fast Can Lightsail 2 Travel?

How Fast Can Lightsail 2 Travel? Solar sails have a maximum speed which is 10% the speed of light, which equates to 18,600 miles per second or, 67,100,000 mph. Solar powered spacecrafts are able to travel faster than conventional rocket fueled spacecrafts due to constant light pressure being applied to the sail propelling it forward.