The tests were conducted in the Circulating Water Channel at the U.S. Coast Guard Academy at New London, Connecticut. This facility is described in reference 5 and provides a flow channel 2 ft deep by 4 ft wide by 12 ft long with a maximum flow velocity of 8 ft/sec.
Three monohull models were tested: a 1/43 scale model and a 1/32 scale model of the "Standfast" sailing yacht and a 3-foot fibreglass model purchased from Dumas Products, Tucson, Arizona. Their "Huson" design was modified to represent a 1/14 scale model of the "Standfast."
One trimaran model was tested. This did not represent a specific full-scale design but was intended to be typical of multihulls in the 30 to 40-foot size range. The characteristics of these models are listed in Figure 11.
For a typical test run, the model was placed in the flow channel and tethered to a load cell with a light monofilament line attached to either the bow or to the stern. This was done to simulate the boat being pulled forward, as with a sea anchor, or backward, as with a drogue. The velocity of the flow channel was varied from 2 to 8 ft/sec and the drag load recorded on a strip chart.