Efficiency: The Cost of Speed
To wrap up the technical side of boat selection, we have to talk about the "burn." Performance on a Ranger Tug is a tale of two hulls: the outboard-powered planing hulls that want to get up and go, and the diesel-powered semi-displacement hulls that reward you for slowing down. One of the first things you learn as an outboard Ranger Tug owner is that there is an expensive "hump" in your fuel curve. For the outboard models (R-23, R-25, R-27), there is a range between 10 and 20 MPH where you are effectively plowing water—the bow is up, the engine is straining, and your fuel economy is at its worst. There is even a range that boats cannot maintain. Our R-25 with the stock propeller could not maintain a speed between 12 and 18 MPH. Once you get over that hump and onto a plane, the numbers improve. Even at hull speed, your efficiency isn’t great, although at idle, they will run for hours, just not get very far. On the diesel side (R-29, R-31, R-43), the logic flips. Thes...