Diesel locomotives are powered by diesel engines. Heavy trucks are usually powered with diesel engines. The vehicle is then powered solely by the electric motor. The Tu-204SM will be powered by two PS-90A2 engines. Modern capstans are powered electrically, hydraulically, pneumatically, or via an internal combustion engine. It may be electrically powered, or have an internal combustion engine. These can often also be powered using solar power. The school is powered entirely by solar power. They could be powered by steam engines by about 1882. They were still powered by Welland I engines. Solar powered watches are powered by light. The equipment is normally powered from batteries. Now, buses can be powered through wireless induction technology. Search would be powered by Microsoft Bing technology. Most steamships today are powered by steam turbines.