rclarke246
Senior Member
- Joined
- Mar 17, 2014
- Messages
- 450
- Location
- USA
- Vessel Name
- Lady Di
- Vessel Make
- 2012 Beneteau Swift Trawler 44
Hello All,
Newbie here. I'm confused about exactly what is meant by "hull speed", "planing speed", "cruising speed", etc...
I'm "all about efficiency", unless faced with extenuating circumstances.
I know, I can hear some of you now, "then WHY on earth did you ever buy that boat"??! Nonetheless, we did, we love her and have ZERO regrets. Remember, "A man convinced against his will is of that opinion still". I warned you that I was a "newbie"!
Here is some background for you:
Hull: Semi-displacement
LWL: 37' 6"
Beam waterline: 12' 8"
Displacement (full): 30,000 lbs.
Power: 2 Volvo Penta D4 turbos, 300 hp ea.
Here are a few of the actual stats I recorded last summer:
3,500 rpm's, 24 kn., 30 gph (WOT)
2,800 rpm's, 15 kn., 18 gph
2,000 rpm's, 11 kn., 8 gph
Has trim tabs, which have no effect under 2,000 rpm. When hull is planing(?) the "bow down" attitude results in an increase of about 1 kn.
As usual, we're interested in any thoughts or recommendations you may have.
Thank you!
Newbie here. I'm confused about exactly what is meant by "hull speed", "planing speed", "cruising speed", etc...
I'm "all about efficiency", unless faced with extenuating circumstances.
I know, I can hear some of you now, "then WHY on earth did you ever buy that boat"??! Nonetheless, we did, we love her and have ZERO regrets. Remember, "A man convinced against his will is of that opinion still". I warned you that I was a "newbie"!
Here is some background for you:
Hull: Semi-displacement
LWL: 37' 6"
Beam waterline: 12' 8"
Displacement (full): 30,000 lbs.
Power: 2 Volvo Penta D4 turbos, 300 hp ea.
Here are a few of the actual stats I recorded last summer:
3,500 rpm's, 24 kn., 30 gph (WOT)
2,800 rpm's, 15 kn., 18 gph
2,000 rpm's, 11 kn., 8 gph
Has trim tabs, which have no effect under 2,000 rpm. When hull is planing(?) the "bow down" attitude results in an increase of about 1 kn.
As usual, we're interested in any thoughts or recommendations you may have.
Thank you!