Rainbow (clipper)

Rainbow was launched in 1845. She created a sensation while still on the stocks because of her concave or hollowed lines forward, which opposed the tradition and practice of shipbuilding of the time.[6]

"The sharp model of Rainbow gave rise to a great deal of discussion while she was on the stocks in course of construction. It was generally admitted by the recognized shipping authorities of South Street, that she was a handsome vessel, but whether she could be made to sail was a question on which there were varieties of opinion."[7] "Her bow with its concave waterlines and the greatest breadth at a point considerably further aft than had hitherto been regarded as practicable, was a radical departure, differing not merely in degree but in kind from any ship that preceded her. One critical observer declared that her bow had been turned " outside in," and that her whole form was contrary to the laws of nature."[8]

By 1930, looking back on the clipper era, the bow appeared much less shocking than it did at the time. Cutler writes,

“The Rainbow represented a certain departure from fast-sailing models of her day but she was far from being a radically new type ... However, her appearance as she gradually took shape on the stocks aroused so much criticism that her owners delayed her completion for more than a year. She was, perhaps, the first ship of the extremely hollow bow type, and in spite of the fact that very similar lines had been incorporated in pilot boats for years, old wiseacres grumbled that her bows were 'turned inside out.'"[9]

plans and elevation of Rainbow.

"Perhaps it was the ongoing philosophical contest between the proponents of the traditional flat-footed vessel, as staunchly favored by Nathaniel B. Palmer, and those who were swayed toward the sharp-bottomed vessels championed by John W. Griffiths in the form of Sea Witch and Rainbow, both vessels of remarkable performance and far-flung reputation."[10]

"In 1841, John W. Griffeths [sic], of New York, proposed several improvements in marine architecture, which were embodied in the model of a clipper ship exhibited at the American Institute, in February of that year. Later he delivered a series of lectures on the science of ship-building, which were the first discourses upon this subject in the United States. Mr. Griffeths advocated carrying the stem forward in a curved line, thereby lengthening the bow above water; he also introduced long, hollow water-lines and a general drawing out and sharpening of the forward body, bringing the greatest breadth further aft. Another improvement which he proposed was to fine out the after body by rounding up the ends of the main transom, thus relieving the quarters and making the stern much lighter and handsomer above the water-line."[11]

"This proposed departure from old methods naturally met with much opposition, but in 1843 the firm of Howland & Aspinwall commissioned Smith & Dimon, of New York, in whose employ Mr. Griffeths had spent several years as draughtsman, to embody these experimental ideas in a ship of 750 tons named the Rainbow. This vessel, the first extreme clipper ship ever built, was therefore, the direct result of Mr. Griffeths's efforts for improvement."[11]

"Mr. Griffeths [sic] relates a good story about the masting of this vessel. It appears that Mr. Aspinwall, who had an excellent idea of what a ship ought to be, had come to the conclusion that the masting of vessels was a question of no small moment in shipbuilding, and determined that his new ship should have the benefit of foreign aid in placing the masts. Accordingly, he informed the builders that he would obtain assistance from abroad, for their benefit as well as his own. The builders naturally paid little attention to this information. The port-captain, who was appointed to superintend the construction, was directed by Mr. Aspinwall to select the best authorities in Europe on masting ships. The European experts were written to in reference to this important matter, and after they had duly considered the principal dimensions of the vessel, the trade in which she was to be employed, etc., a paper draft and elaborate calculations were prepared and forwarded to New York."[12]

In the meantime, the construction of the Rainbow had progressed steadily.[12]

"The clamps being ready, the deck beams were placed according to the original drawings, the framing of the decks completed, hatches and mast partners framed, channels and mast-steps secured; the masts and yards were also made and the ship planked and caulked by the time the important despatches arrived."[13]

"They were examined by the port-captain, Mr. Aspinwall was informed that they were all right, and the port-captain was requested to give the information to the builders, which, of course, was done. The ship, however, was finished without the slightest alteration from the original plans. Mr. Aspinwall, who never doubted that his pet project had been carefully carried out, attributed much of the success of this vessel to the placing of her masts by foreign rules."[7]