kostond
New Member
- Oct 27, 2010
- 58
- Boat Info
- 1986 390 Sedan Sportfish, Custom hardtop, Raymarine RL80c, Glendinning Synchronizer,Navico autopilot
- Engines
- 1996 Volvo Penta TAMD63p's
I was at the marina talking with a friend today when the discussion turned to prop rotation:grin:. I explained to him that the rotation on my boat was the opposite of most boats I see. Viewed from the stern my port prop spins "clockwise" and my starboard prop spins "counterclockwise".
He thought that was all wrong and paraded me down to some of his dock buddies so they could set me straight.
They all seem to think that my configuration renders the boat very inefficient at traveling through the water.
They said that when the props spin like most boats the props are biting into clean water as opposed to the turbulent water found torward the center of the boat.
As evidence they predicted that my boat is sluggish at rotating with one engine in forward and the other in reverse.(it is, which is why I think a previous owner installed bow and stern thrusters)
They also believe my fuel economy would improve because the boat will move through the water more easily. I only averaged 0.8mpg bringing the boat home from NJ a few weeks ago. I honestly expected to get a little over 1mpg.
They just about have me convinced. Any opinions out there?
Nick K
He thought that was all wrong and paraded me down to some of his dock buddies so they could set me straight.
They all seem to think that my configuration renders the boat very inefficient at traveling through the water.
They said that when the props spin like most boats the props are biting into clean water as opposed to the turbulent water found torward the center of the boat.
As evidence they predicted that my boat is sluggish at rotating with one engine in forward and the other in reverse.(it is, which is why I think a previous owner installed bow and stern thrusters)
They also believe my fuel economy would improve because the boat will move through the water more easily. I only averaged 0.8mpg bringing the boat home from NJ a few weeks ago. I honestly expected to get a little over 1mpg.
They just about have me convinced. Any opinions out there?
Nick K