The controversy rages in dockside watering holes, tackle shops, and Internet chat rooms: Which rides better-a catamaran or a V-hull? So far, all the talk has been purely subjective: A cat feels like this, a V-hull feels like that. To us, that's useless. At Boating Magazine, we need hard numbers, things that we can quantify, then we'll decide. So we took a Regulator 26, which just might be the best-riding V-hull for its size, and a Glacier Bay 260 Canyon Runner, one of the best-riding cats, and wired them with expensive sensing gear. Rather than a match between two specific boats, it would be a comparison of the finest qualities of each type. We expected the cat to be smoother when the going got rough, but what about the other times? Is it the most comfortable all-around boat? It took us a year-that's right, one full year-to compile and understand the data, but here, finally, is the answer.
Measured Madness
Our first problem was how to quantify a boat's motion underway. The best tool we came up with is an accelerometer, which records changes and degrees of motion. We also had electronic gear to measure the boats' angles, WAAS-enabled GPS units, rangefinders to measure distances, four laptops, stopwatches, plumb bobs, measuring tapes, and eventually, a collection of soggy notebooks.
To help us make sense of what we compiled, and back up our conclusions, we enlisted two top naval architects. So we'd like to thank Rick Strand, president of Strand Technologies, a consultant to companies such as Tillotson-Pearson, Boston Whaler, and Brunswick; and John H. Deknatel, president of the legendary design firm C. Raymond Hunt Associates.
With their help, the evidence became clear. What we discovered should silence the know-it-alls and may surprise the enlightened. Without question, we've killed the controversy. The boat type with the most comfortable ride is...
Not so fast-to understand our answer, you need to know how we approached the question.
Three Easy Pieces
First, we wanted to measure how differently cats and V-hulls turn. To do this, we set up a buoy and had each boat make the tightest 180-degree turn it could at 30 mph. The diameter of each boat's turn was about the same, although the V-hull averaged 8.4 seconds compared to the cat's 8.9 seconds. The important difference, however, was how each banked in the turn.
Our electronic angle indicator showed the cat leaning outward by 26 degrees. The unit may have been over-reading due to outward force, but none of the techies from the indicator's company could confirm this and they therefore stand by its number. By any measure, the cat did lean outward at a steep angle, which can be disconcerting to say the least. Loose gear slides more when a boat leans opposite the turn, and the push that occurs at the apex can make you feel as if you're going to be thrown out. Of course, with time, you can get used to this. Furthermore, the lean can be minimized by trimming up the outboard engine and trimming down the inboard.
In contrast, the V-hull banked inward by 10 degrees. This not only feels natural, it also has a practical advantage. Centrifugal force pins you and your deck gear into the boat, and you need no special trimming techniques-just turn the wheel.
Both boats are designed for fishing, so our second test was to see how each fared while drifting.
To start, we measured each boat's roll period-how long it takes to roll all the way to one side and back again. Too short a roll period foretells a jerky motion at sea, too long may mean there's not enough initial stability. The cat's period was 2.2 seconds. The V-hull's was 2.4 seconds, almost 10 percent slower-which in this case is good.
