On Sun, 16 Jan 2011 07:24:40 -0800 (PST), Frogwatch
wrote:

We did not tow the dinghy long enough to know how much it slowed us.

On my old Cal-34 we used to estimate that the dinghy slowed us
somewhere between 1/4 and 1/2 knot. Even with our trawler which has
tons of weight and a lot of power, we think the dinghy slows us by 1
or 2 tenths. At 6 or 7 kts the dinghy is leaving a bigger wake than
the trawler.