What is Propulsion tools?
'''Propulsion''' is the use of [[force]] to make [[movement]].<ref>A Dictionary of Aviation, David W. Wragg. {{ISBN|9780850451634}}, 1st Edition Published by Osprey, 1973 / Published by Frederick Fell, Inc., NY, 1974 (1st American Edition.), Page 216.</ref> For '''ground propulsion''' the first instrument was the [[wheel]]. For '''water propulsion''' [[Punt (boat)|pole]], [[paddle]], [[oar]] and [[sail]] have been used. Nowadays the most common types are underwater [[propeller]]s. Sails are still common, and historically represented the most important form of early propulsion for large [[ship]]s. For '''air propulsion''', the most common types are [[propeller]] and [[jet engine]]. Others have been used experimentally. ==References== {{reflist}} {{tech-stub}} [[Category:Tools|Propulsion tools]]