Hippocampus
Guru
- Joined
- Jul 27, 2020
- Messages
- 4,182
- Location
- Plymouth
- Vessel Name
- Hippocampus
- Vessel Make
- Nordic Tug 42
Don just make sure you’re not under powered agree over ain’t a biggie.
Don just make sure you’re not under powered agree over ain’t a biggie.
I would "assume" that if original engines it isn't underpowered really.
Guess that could make an ass out of me
Agreed. What would really suck is buying a boat with largish twins but they are not big enough to get past the hull-speed barrier. It happens. I'm pretty skeptical of most builders- few are experienced mariners so tend to be a bit opportunistic in what they install.It depends. Some of the SD trawlers out there could be considered underpowered in the sense that the hull could easily make use of more power (and it might be useful if you were running through challenging inlets frequently, for example). But for primarily running at 7 kts, they're not underpowered.
Yep. Plenty. Won't plane the boat - maybe 12 kts. But assuming adequate rudder size, plenty to keep the boat maneuverable.it seems that among the trawlers I have saved for consideration the smallest HP to length is 42' and has twin 160s. Is that not enough????
it seems that among the trawlers I have saved for consideration the smallest HP to length is 42' and has twin 160s. Is that not enough????
43 ft waterline; 7Kn gets about 2.5 plus NMPG. QSB/380HP. I am in the open ocean mostly, not protected waters, therefore constant swell and current so numbers can vary.
I spec’d a 380HP Cummins for the build. Figured it would be nice to get the extra speed on occasion but I rarely use it and often shoot for 7.5Kn where the boat is happiest. However, running down swell and increasing power to match up better with swell speeds at 8 to 9 Knots is a bonus and makes for a more comfortable ride. As well as throttling up for a few minutes to dodge a ferry or whatever.
In retrospect, the base 250HP engine that comes with the Helmsman 43 would also have been fine.
You appear to have some strong opinions on subjects based on your previous posts, which is fine. Sometimes there are no right or wrong answers, just different use cases for everyone and hence different approaches whether its power, hull design, etc.
I really hope that is 2.4NMPGMy Perkins TE6.354’s get 2.4 GPM AT 7 Kts on a 42’ Ocean Yacht. Awesome engines. 43 years old now. Hope to make another mini loop here next year
it seems that among the trawlers I have saved for consideration the smallest HP to length is 42' and has twin 160s. Is that not enough????