List of Mechanical Engineers - S

S

• Ralph Sarich (born December 10, 1938) – Invented Orbital engine in 1972 and developed the orbital combustion process engine, which is based on a re-designed two stroke engine using direct gasoline injection
• Thomas Savery (c. 1650 - 1715) - Early steam engine patent holder, author of "A Miner's Friend; or An Engine to Raise Water by Fire"
• Per Georg Scheutz (1785–1873) Pioneer in computer technology (Scheutzian calculation engine)
• Carl Wilhelm Siemens (1823–1883) - Inventor of the regenerative furnace
• Igor Sikorsky (1889–1972) - Aviation engineer, inventor of the single-rotor helicopter, founder of Sikorsky Aircraft Company
• Isaac Singer (1811–1875) - Credited with improvements in lockstitch sewing machine, founder of the Singer Sewing Machine Company
• John Smeaton (1724–1792) - Principally a civil engineer, but made numerous improvements to Newcomen's steam engine
• Edward Somerset (c. 1601-1667) - Numerous mechanical innovations are described in his book "Century of Inventions" published 1663
• Sir William Stanier - Chief Mechanical Engineer of the London, Midland and Scottish Railway.
• George Stephenson (1781–1848) - Known as the "Father of Railways", founder of the Institution of Mechanical Engineers
• Robert Stephenson (1803–1859) - Railway engineer, son of George Stephenson
• Robert Stirling (1790–1878) - Inventor of the Stirling Engine
• Su Song (1020–1101) China - First to use an escapement mechanism (see Yi Xing below) and chain drive to operate his astronomical clock tower
• Dr. Victor Szebehely- Aerospace Engineering & Celestial Mechanics