1845: During the late 1830s, canal steam boats begin operating with limited success but in 1845, Birmingham engineer John Inshaw builds the first twin-screw canal steamers. Inshaw finds great success through his engineering and in 1859 the owners of the Ashby Canal ban his steamer "Pioneer", claiming it erodes the canal banks. It is later allowed to run no faster than 4 mph, thus begin speed limits on British waterways. Inshaw's "Pioneer" is successful and later inspires other steam boats such as those built for the Grand Junction Canal. Inshaw is also consulted by George Stephenson on the design of wheels for steam locomotives.