Scooby5959
Scraping Paint
- Joined
- Jun 5, 2021
- Messages
- 255
- Vessel Name
- Tug life
- Vessel Make
- Nordic tug 26
What is the real question
I don’t know exactly what you’re asking . if you are asking what engines are the most inefficient For this type of hull . I would probably have to say Any twin engine would be a bad choice. For a variety of reasons that has been discussed many times . but if you’re looking to have the most efficient power plant single engine is the correct answer. My choice would be an engine with enough horsepower to push the boat along at seven or eight knots and a reserve of a couple of knots for when you need extra power . Also an engine that at least has removable cylinder sleeves so you can rebuild the engine in the boat. Anything else would be a bad choice for this type of hull design .If you want or need more speed . then look for a boat that is designed to plane .your run-of-the-mill sports Fisher come to mind. I’m sorry if this isn’t what you wanted to hear it is what it is .you can’t have your cake and eat it too
My wife and I are on our first official road trip to look at a trawler. I’ve been a registered user here for a few years in anticipation. We have been sailers for over 40 years, And I’ll keep our coastal and easily singlehanded sailboat for the foreseeable future. Here’s my questions, which illustrate my sailing background.
Do power vessels have a “ hull speed” and is it the same formula as with a sailboat? My brain doesn’t function well in this arena.
I’m mostly just curious about the above, but here is my main question.
The Grand Banks 42 we will see today has twin Ford Lehman’s each of 120HP. They list a cruising speed of nine knots. In my very limited knowledge that sounds about right.
The other Grand Banks 42 has twin CAT 3208’s stating 375 HP. It says a cruising speed of 18 knots? That sounds quite fast for a trawler regardless of all the additional horsepower. I also know they all have optimum RPM’s, giving the balance between speed and fuel consumption, but sure that will differ between the two as well. Any follow up will be helpful, including thoughts on what optimum cruising speed and fuel burn would be.
I don’t know exactly what you’re asking . if you are asking what engines are the most inefficient For this type of hull . I would probably have to say Any twin engine would be a bad choice. For a variety of reasons that has been discussed many times . but if you’re looking to have the most efficient power plant single engine is the correct answer. My choice would be an engine with enough horsepower to push the boat along at seven or eight knots and a reserve of a couple of knots for when you need extra power . Also an engine that at least has removable cylinder sleeves so you can rebuild the engine in the boat. Anything else would be a bad choice for this type of hull design .If you want or need more speed . then look for a boat that is designed to plane .your run-of-the-mill sports Fisher come to mind. I’m sorry if this isn’t what you wanted to hear it is what it is .you can’t have your cake and eat it too