History of the steam engine This boat could typically make 7 to 8 miles per hour, and traveled more than during its short length of service. The Fitch steamboat was not a commercial success, as this route was adequately covered by relatively good wagon roads. In 1802 William Symington built a practical steamboat, and in 1807 Robert Fulton used a Watt steam engine to power the first commercially successful steamboat. Oliver Evans in his turn was in favour of "strong steam" which he applied to boat engines and to stationary uses. He was a pioneer of cylindrical boilers; however Evans' boilers did suffer several serious
O 19-class submarine O 19-class submarine The "O 19" class was a class of two submarines, built for the Royal Netherlands Navy by "Fijenoord", Rotterdam. The ships were designed as submarine minelayer for operations in both European and colonies waters. The class comprised "O 19" and "O 20" and were the first submarines in the world to be equipped with a submarine snorkel that allowed the submarine to run its diesel engines while submerged. The submarines diving depth was . These units were very similar to earlier Polish , with a reduced torpedo battery and 10 vertical mine tubes fitted on each beam.