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03-02-2021, 01:15 PM
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#1
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Veteran Member
City: Vancouver
Join Date: Feb 2021
Posts: 30
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10-12knt trawler? 40'
Hi, we just sold our bayliner 3288 and are looking for something bigger.
Its about 35 nautical miles to cross the straight from our dock . With currents... 7-8 knots would be too slow.. just for the crossing, after work on a Friday for example..
40' 10-12knts economical cruise speed.. 1 Walk-around bed and another separate guest area for 2 adults. Upper helm. (Lower helm not necessarily needed).
Considering a 2000 bayliner 3788..or older 3988.. may not be a big enough.. and may not be suited to 8 knot long haul trips that we enjoy when there are no time constraints. I know the 3988 is not great at slow speeds. Don't care for the 38xx series bayliners..
Cruising area.. pacific northwest.
Budget.. tight... 150,000 cad.
Any ideas would be appreciated!
Thanks
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03-02-2021, 01:32 PM
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#2
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Guru
City: Between Oregon and Alaska
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 3,021
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You can't overcome hull speed except with horsepower. 40' = 8+kts.Your not going to cruise economically at 12 knots with a 40' boat. Get a longer boat or think about a sport fishing type.
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03-02-2021, 01:36 PM
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#3
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,129
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Our 41’ President will do that easily and we will be selling it this spring, but it is in Michigan...
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03-02-2021, 01:46 PM
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#4
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Veteran Member
City: Vancouver
Join Date: Feb 2021
Posts: 30
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Yes thanks...the harbourmaster may let us get away with max 46 oal' including tender overhang.. maybe "economical" was the wrong wording.. 1.5 nautical mpg maybe at 12 knots?
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03-02-2021, 01:47 PM
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#5
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Veteran Member
City: Vancouver
Join Date: Feb 2021
Posts: 30
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There are a couple of those (president)boats available in Washington state..once the borders open ill get a good look at one. Thanks
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03-02-2021, 01:52 PM
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#6
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Guru
City: Rochester, NY
Vessel Name: Hour Glass
Vessel Model: Chris Craft 381 Catalina
Join Date: Aug 2019
Posts: 7,538
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Even 1.5 nmpg at 12 kts is optimistic for a boat that size. But if you can live with 1 nmpg at fast cruise, that'll get you up into the range of fully planing hulls, as there are some that'll do 1 nmpg at 16 - 18 kts. 12 kts is just a tough speed to design for, as it's not enough to plane, so most hulls that can do that speed are pushing a lot of water to do it.
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03-02-2021, 01:57 PM
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#7
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Valued Technical Contributor
City: Litchfield, Ct
Join Date: Aug 2012
Posts: 6,775
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I plugged in some grabass numbers for a 40' semi-displacement hull into Vicprop's prop hp calculator. For a 40' boat of 30,000 lbs displacement to reach 12 kts, takes 169 hp and will burn roughly 10 gph.
So look for a boat with at least 300 hp which will be enough that 169 hp won't be too much load on it.
Any of the older Lehman or Perkins N.A. powered boats won't work, unless it is the turbo version. Look for a Cummins 6B 370 , Cat 3116 350 or Yanmar 6LY 370 powered boat at least for singles.
David
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03-02-2021, 01:59 PM
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#8
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Veteran Member
City: Vancouver
Join Date: Feb 2021
Posts: 30
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" Even 1.5 nmpg at 12 kts is optimistic for a boat that size. But if you can live with 1 nmpg at fast cruise, that'll get you up into the range of fully planing hulls, as there are some that'll do 1 nmpg at 16 - 18 kts. 12 kts is just a tough speed to design for, as it's not enough to plane, so most hulls that can do that speed are pushing a lot of water to do it."
, I guess that will have to be the criteria, could be OK with the 1 mpg at 12 knots if the 8 knot mpg is in the sweet spot.
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03-02-2021, 02:01 PM
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#9
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Guru
City: Rochester, NY
Vessel Name: Hour Glass
Vessel Model: Chris Craft 381 Catalina
Join Date: Aug 2019
Posts: 7,538
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On an average 40 footer with diesels, I'd figure slow cruise should give somewhere in the 2.5 - 3.5 nmpg range at 7 kts, probably 2 - 3 at 8 kts depending on the hull shape and waterline length.
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03-02-2021, 02:03 PM
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#10
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Veteran Member
City: Vancouver
Join Date: Feb 2021
Posts: 30
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Quote:
Originally Posted by DavidM
I plugged in some grabass numbers for a 40' semi-displacement hull into Vicprop's prop hp calculator. For a 40' boat of 30,000 lbs displacement to reach 12 kts, takes 169 hp and will burn roughly 10 gph.
So look for a boat with at least 300 hp which will be enough that 169 hp won't be too much load on it.
Any of the older Lehman or Perkins N.A. powered boats won't work, unless it is the turbo version. Look for a Cummins 6B 370 , Cat 3116 350 or Yanmar 6LY 370 powered boat at least for singles.
David
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There's that math and physics messing everything up for us dreamers lol!
Thanks that is good info.
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03-02-2021, 02:11 PM
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#11
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Guru
City: Tacoma, WA & Ashland, OR
Vessel Name: boatless, ex: Seeadler
Vessel Model: RAWSON 41
Join Date: Jun 2016
Posts: 2,217
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I have a 41 foot boat (about 38'lwl) powered by two 220 hp Cats. The broker listing said "16 knot max". That may be true, but 13 kts produces more noise than I can bear, so I've never pushed it to "wide-open"
As to fuel consumption, I can get a reliable 1.7mpg at 8 knots--1600rpm. On the rare occasion when I run at 12kts, 2200, consumption falls below 1mpg. Fortunately, my background is entirely in sailboats, so I still find 8 knots to be fast.
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03-02-2021, 02:46 PM
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#12
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,129
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Our 41’ President with SP225 Lehmans did 17 knots WOT on the sea trial. We generally cruise about 9 knots. We get about 1.25 kmpg at 10 knots.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you aren’t one, there is no explanation possible.
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03-02-2021, 03:43 PM
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#13
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Guru
City: gulf coast
Join Date: Jun 2014
Posts: 3,440
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12 knots is not a good speed for a 40' boat. It will not be on plane and too fast for economical cruise. Just pushing water for no real gain.
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03-02-2021, 03:55 PM
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#14
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Veteran Member
City: Vancouver
Join Date: Feb 2021
Posts: 30
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Quote:
Originally Posted by Comodave
Our 41’ President with SP225 Lehmans did 17 knots WOT on the sea trial. We generally cruise about 9 knots. We get about 1.25 kmpg at 10 knots.
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Thats pretty good. Is that the aft cabin?
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03-02-2021, 03:59 PM
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#15
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Veteran Member
City: Vancouver
Join Date: Feb 2021
Posts: 30
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Quote:
Originally Posted by bayview
12 knots is not a good speed for a 40' boat. It will not be on plane and too fast for economical cruise. Just pushing water for no real gain.
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Yes, I would like a 42 grand banks or ocean Alexander.. possibly a 42 chb europa style.. but it looks like I'll have to be in a semi planing hull.
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03-02-2021, 04:22 PM
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#16
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Guru
City: Queensland
Vessel Model: Milkraft 60 converted timber prawn trawler
Join Date: Jul 2016
Posts: 5,482
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Nope, ain't gonna happen.
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03-02-2021, 04:52 PM
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#17
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Guru
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,738
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https://scontent-sea1-1.xx.fbcdn.net...f5&oe=60638942
May be light enough to fill your bill re speed.
Hullform is very compliant to 10-12 knots.
Usta be readily available. Now would take a lot of looking.
Another scarce boat (but plastic) a 41’ descendant of the Camano boat formerly built in BC. Don’t remember the decendant’s name but they were claimed to be very efficient .
__________________
Eric
North Western Washington State USA
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03-02-2021, 05:02 PM
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#18
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Guru
City: Victoria TX
Vessel Name: Bijou
Vessel Model: 2008 Island Packet PY/SP
Join Date: Nov 2012
Posts: 5,290
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10-12knt trawler? 40'
How about one of the PDQ 34s? They can do that speed economically.
Not a 40’ boat obviously, but maybe it has the room of a 40’ monohull?
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03-02-2021, 05:16 PM
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#19
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Veteran Member
City: Vancouver
Join Date: Feb 2021
Posts: 30
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Yep, I could look for those.. thanks
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03-02-2021, 05:39 PM
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#20
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,129
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Quote:
Originally Posted by JoePNW
Thats pretty good. Is that the aft cabin?
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Yes, it has an aft cabin. There are a lot of different interior layouts in the 41s. But they all have at least 2 cabins and galley down. I have seen a couple that have 3 cabins but they seem cramped to me.
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