John Fitch (inventor)
The first successful trial run of his steamboat "Perseverance" was made on the Delaware River on August 22, 1787, in the presence of delegates from the Constitutional Convention. It was propelled by a bank of oars on either side of the boat. During the next few years, Fitch and Voigt worked to develop better designs, and in June 1790 launched a boat powered by a steam engine driving several stern-mounted oars. These oars paddled in a manner similar to the motion of a swimming duck's feet. With this boat, he carried up to 30 paying passengers on numerous round-trip voyages between Philadelphia and Burlington, New Jersey during the summer of 1790. Estimates of miles traveled that summer range from 1,300 to 3,000, and Fitch claimed that the boat often went for 500 miles without mechanical problems. Estimated speeds were of a minimum 6 miles per hour under unfavorable conditions, to a maximum of 7 or 8 miles per hour.
Fitch was granted a U.S. patent on August 26, 1791, after a battle with James Rumsey, who had also invented a steam-powered boat. The newly created federal Patent Commission did not award the broad monopoly patent that Fitch had asked for, but rather a patent of the modern kind, for the new design of Fitch's steamboat. It also awarded steam-engine-related patents dated that same day to Rumsey, Nathan Read, and John Stevens. The loss of a monopoly due to these same-day patent awards led many of Fitch's investors to leave his company. While his boats were mechanically successful, Fitch no longer had the financial resources to carry on.
Battleship
The first major change to the ship of the line concept was the introduction of steam power as an auxiliary propulsion system. Steam power was gradually introduced to the navy in the first half of the 19th century, initially for small craft and later for frigates. The French Navy introduced steam to the line of battle with the 90-gun in 1850—the first true steam battleship. "Napoléon" was armed as a conventional ship-of-the-line, but her steam engines could give her a speed of , regardless of the wind condition. This was a potentially decisive advantage in a naval engagement. The introduction of steam accelerated the growth in size of battleships. France and the United Kingdom were the only countries to develop fleets of wooden steam screw battleships although several other navies operated small numbers of screw battleships, including Russia (9), the Ottoman Empire (3), Sweden (2), Naples (1), Denmark (1) and Austria (1).