Figure 8.—Danish copy of original sail plan of Robert Fulton’s Steam Battery, dated September 12, 1817, in Rigsarkivet, Copenhagen.
Figure 9.—Lines of Fulton’s Steam Battery, as reconstructed for a model in the Museum of History and Technology.
Figure 10.—A reconstruction of inboard works of the Steam Battery, for construction of the model in the Museum of History and Technology.
For 18 years Petty did no more with the type, but finally, in July 1684, he laid down a still larger sloop with two decks and a mast standing 55 feet above her upper deck. She was named St. Michael the Archangel and is probably the design in Pepys’ Book of Miscellaneous Illustrations in Magdalene College, Cambridge, England. This vessel proved unmanageable and was a complete failure.