Facebook Twitter

Donate to BlackPast Blog
  • African American History
  • African American History in the West
  • Global African History
  • Perspectives

NOTE: will not disclose, use, give or sell any of the requested information to third parties.

9 + 0 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.

Rock the Vote

NAAAS & Affiliates 27th Joint National Conference

Shop Amazon and help in the Classroom

Bradley, Benjamin (1830- ?)

USS Dale, Sloop-of-War, ca. 1860
Image Ownership: Public Domain

Benjamin Bradley was the first person to develop a working model of a steam engine for a war ship.  Born in Maryland around 1830 Bradley was owned by an unidentified slaveholder in Annapolis, Maryland.  While living in Annapolis Bradley worked for a printing company at a young age.  At the age of 16 he demonstrated his great skill in mechanical engineering.  He constructed a model of a steam engine out of two pieces of steel, a gun barrel, and pewter.  Impressed by this feat, his master arranged for Bradley to work at the Department of Natural and Experimental Philosophy at the Naval Academy in Annapolis, Maryland.  Bradley became the first African American to hold any but menial posts at the Naval Academy.  

Bradley learned to read and write at the Academy.  In time he became an assistant who set up experiments for the Academy's faculty.  While working at the Naval Academy he sold his first small steam engine to a Midshipman living in Annapolis. This engine was powerful enough to run a small boat.  Bradley used this money to expand on his findings and create an even larger model.

Around 1856 Bradley built an engine that was capable of propelling the first sloop-of-war (a small warship carrying guns on one deck) at the rate of 16 knots an hour.  His engine was the first ever created that was powerful enough to run a war ship.  Bradley was unable to patent his invention under the United States law because he was a slave.  He did however sell this engine and earn enough money to purchase his freedom.  His date of death is unknown.

Michael Brodie, Created Equal: The Lives and Ideas of Black American Innovators (New York: William Morrow and Company, Inc., 1993); Jim Haskins, Outward Dreams: Black Inventors and Their Inventions (New York: Walker Publishing Company, Inc., 1991).


University of Washington, Seattle

Entry Categories:

Copyright 2007-2017 - v3.0 NDCHost - California | | Your donations help us to grow. | We welcome your suggestions. | Mission Statement is an independent non-profit corporation 501(c)(3). It has no affiliation with the University of Washington. is supported in part by a grant from Humanities Washington, a state-wide non-profit organization supported by the National Endowment for the Humanities, the state of Washington, and contributions from individuals and foundations.