In science, engine development timeline traces the chronological development of the modern engine, from the early vacuum lifting devices (Guericke engine, 1850), to the construction of the first gunpowder engine (1678), to the design of the first steam engine (Papin engine, 1690), to the construction of the first operational steam engine (Miner's friend, 1698), to the description of the first theoretical heat engine (Carnot engine 1824).

The following is a chronological listing of the development and invention of engines, the name "steam engine" being a generic name for the the engines built by Papin to Watt, using water as the working body, and the name "heat engine" referring to any body, whatsoever, that produces work by the alternating action of contact with a and a hot body and a cold body.

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Date	Type	Picture	Description

1647	Suction pump Inventor: Otto Guericke (others before?)
1650	Piston and cylinder Inventor: Otto Guericke (others before?)
1650	Vacuum pump Inventor: Otto Guericke		[5]
1654	Guericke engine Inventor: Otto Guericke
1658	Pneumatical engine Inventor: Robert Hooke (under direction of Robert Boyle)		[4]
1678	Gunpowder engine Inventor: Christiaan Huygens		[6]
1679	Boiling engine (Papin's digester) Inventor: Denis Papin
1685	Papin's pneumatic engine for raising water Inventor: Denis Papin
1687	Papin’s gunpowder and air engine Inventor: Denis Papin
1690	Papin engine Inventor: Denis Papin
1698	Savery engine (Miner's friend) (Savery sump pump) Inventor: Thomas Savery		[3]
1712	Newcomen engine (Atmospheric Engine) (improved Savery engine) Inventor: Thomas Newcomen
1741	Smeaton engine (improved Newcomen engine) Inventor: John Smeaton
1765 to 1796	Watt engine (improved Newcomen engine) Inventor: James Watt		Added separate condenser (1765), sun and planet gear (1781), centrifugal governor (1788), and indicator diagram (1796).
1801	Trevithick engine Inventor: Richard Trevithick		Built the first steam engine automobiles.
1803	Woolf engine Inventor: Arthur Woolf		Designed an improved boiler for producing high pressure steam (1803) and invented a compound steam engine (1805).
1814	Killingworth locomotive Inventor: George Stephenson
1824	Carnot engine (heat engine) Inventor: Sadi Carnot		[2]
1969	Heat engine (generic) Author: Hendrick Van Ness
2005	Human engine (dihumanid molecular engine) Author: Libb Thims (2005) Barri Gold (2011)		Two human molecules, one male Mx, one female Fy, in a bonded "working" relationship. [7]
2007	Earth surface engines Author: Add Libb Thims (2007)		[8]

See also
● Timeline of thermodynamics

References
2. Carnot, Sadi. (1824). “Reflections on the Motive Power of Fire and on Machines Fitted to Develop that Power.” Paris: Chez Bachelier, Libraire, Quai Des Augustins, No. 55.
3. Savery, Thomas. (1702). The Miner’s Friend – or an Engine to Raise Water by Fire. London.
4. Boyle, Robert. (1660). New Experiments: Physico-Mechanical, Touching the Spring of the Air, and its Effects: Made, for the most part, in a New Pneumatical Engine. Publisher.
5. Schott, Gaspar. (1657). Mechanical Hydraulic Pneumatics (Mechanicahydraulica-pneumatica). Würtzburg.
6. Galloway, Robert L. (1881). The Steam Engine and its Inventors. London: MacMillan and Co.
7. History – HumanThermodynamics.com.
8. (a) Thims, Libb. (2007). Human Chemistry (Volume One) (esp. ch. 3). Morrisville, NC: LuLu.
(b) Thims, Libb. (2007). Human Chemistry (Volume Two). Morrisville, NC: LuLu.

Further reading
● Thurston, Robert H. (1886). A History of The Growth of the Steam-Engine (PG). Publisher.