

- 



I i e 1 1. — Model lines redrawn to outside of plank to show hydrodynamii form ol the Sh tm Battery. 



with two decks and a mast standing 55 feet above her 

 tipper deck. She was named St. Michael tfu Archangel 

 and is probably the design in Pepys' Booh oj M 



Illustrations in Magdalene College. Cambridge, 

 England. This vessel proved unmanageable and was 

 a complete failure. 



Though the double canoes of the Pacific Islands were 

 probably known to some in Europe in l(>b2, there is no 

 evidence tint IVm based his designs on such craft. 

 He appears to have produced his designs spontane- 

 ously from independent observations and resulting 

 theories. Before Petty concluded Ins experiments, a 

 number of double-hull craft had been produced by 

 others; however, some "double" craft, such as 



"double shallops" m.iy h.i\e been "c 1< n ible-eni let s." 



as shown b\ .1 "double-moses boat" of the 18th 

 century and later. 16 



The use of two canoes, joined by a platform or by 

 poles was common in colonial times; in Maryland 

 and Virginia, dugouts so joined were used to transpot t 

 tobacco down the tidal creeks to vessels' loading. 



Such 1 1 .Hi were also used as ferries. M. V. Brewing- 

 ton's Chesapeah Bay Log ( n and Paul Wilstack's 

 Potomm Landings '" illustrate canoes used in this manner. 

 A catamai an galley , two round-bottom hulls, flat on 

 the inboard side (a hull split along the centerline and 

 the inboard faces planked up). 1 1:5 feet long and eacli 

 hull a 7-foot moulded beam, 6-fool 6 inches moulded 

 depth, and placed la feet apart, was proposed by Sir 

 Sidney Smith. R.N., in the 1790's, and built b\ the 

 British Admiralty. Named Taurus, she is shown by 

 the Admiralty draught to have been a double-ender, 

 with cabins amidships mi the platform, an iron rudder 



i i a< h end (between the hulls) steered with till' 

 unship), and with a lamp at one (aid. The plan^ are 

 undated, signed b\ ( laptain Sir Sidney Smith, 

 field-carriage gun is shown at the ramp end of the 

 boat. This, and the heav) rocker in the keels, suggests 

 the /limits was intended for a landing boat. No sail- 

 ing i i<_: is indicated, but tholes for 12 oars or sweeps on 

 e.H li vide ,ne shown. The oarsmen apparently sat on 

 deck, or on low seats, with stretchers in hatl hes 



'" Howard I I hapeixe, Im rican Small Sailing < New 



York: W. W. Norton* Co., Inc., 1951 I, pp. 29, SI. 



" .Newport News. Va.: The Mariners' Museum, 1937, p 

 18 Indianapolis, Ind. : Bobbs Merrill, 1932, p 291. 



paper 39: i ri. ton's "steam bam iky' 



155 



