During 1990â2003, Pakistan sustained its historical lead as the second-most urbanized nation in South Asia with city dwellers making up 36% of its population. Furthermore, 50% of Pakistanis now reside in towns of 5,000 people or more.
Submarine Propulsion Systems. During World War II, most American submarines were powered by diesel-electric systems. This was a departure from earlier submarine power systems, which were direct drive types, little changed from the earliest boats. In this direct-drive power system, the diesel engine is directly connected to the propeller shaft.
Electroprop â Marine Electric and Hybrid Propulsion. The Electric Propeller Company builds Marine Propulsion Drive Motors and Energy Systems for sailboats, yachts and tenders. Electric Propulsion has been around for over 100 years. In the past decade, advances in permanent magnet motors and controllers have yielded higher efficiency with longer range and Electric Propulsion has become a viable alternative for propelling sailing vessels and tenders.