by Edward P. Warner and Shatswell Ober
The work described in this report is the outgrowth of a series of wind tunnel experiments on sails made at the Massachusetts Institute of Technology from 1915 to 1911 and of sundry attempts on the part of the writers to find relations between the performance of sails of a yacht and the wings of an airplane.
The work was done in the summer of 1913, being under the direction of the writers with the assistance of Messrs. John R. Markham, W. Laurence LePage, and James B. Ford. The yacht for the full-scale experiments was furnished by Mr. John S. Lawrence. He and Messrs. Livingston Davis, W. Starling Burgess, and others aided greatly in the course of the work through their experience and interest. The Marconi-rigged S class yacht Papoose was used in all the full-scale experiments. The yacht was fitted with racing sails of the usual cut, the leach being made as flat as possible. The mainsail ran up the mast on a track, and therefore pulled off from the centre of the mast at all times instead of being free to swing around the spar as it could if it were on hoops.
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