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01-07-2022, 04:57 PM
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#1
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Senior Member
City: lockhart
Join Date: Nov 2020
Posts: 384
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What does S/D at 8kts look like?
Anyone have a video of a Fleming at 8kts? Or any other similar S/D at 8kts?
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01-07-2022, 06:13 PM
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#2
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Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 28,155
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No video... but my 40 with a 34 WLL throws a big enough wake at 6.5 knots that slowing down a bit is required to not upset marina dwellers.
The WLL is what determines speed and wake.
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01-07-2022, 06:28 PM
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#3
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Moderator Emeritus
City: SEWARD ALASKA
Vessel Name: DOS PECES
Vessel Model: BAYLINER 4788
Join Date: Feb 2011
Posts: 6,267
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No video but I can tell you that any SD boat over 40' is bow level at 8 knots.
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01-07-2022, 07:29 PM
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#4
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Senior Member
City: Bend, Oregon
Vessel Name: JoAhna K
Vessel Model: 58' Bill Garden Trawler 1952
Join Date: Aug 2020
Posts: 293
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Couple pics of 56’ waterline x 16.5 beam. 61 tons disp. at 8 knots 6 gph and 10 kts. About 3 times the gph
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01-07-2022, 07:42 PM
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#5
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Guru
City: Signal Mtn., TN
Vessel Name: Stella Maris
Vessel Model: Defever 44
Join Date: Feb 2012
Posts: 2,742
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Our boat is variously described as full and semi-displacement. The hull is round and deep with no hard chines, but it flattens a bit toward the stern. (Drawing on the left is amidship and on the right is basically the transom.) The video is us arriving in Chattanooga as we completed the northern half of the Loop. We’re running at hull speed the first 40 second or so of the video, if that’s helpful.
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01-07-2022, 07:43 PM
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#6
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Guru
Join Date: Feb 2010
Posts: 1,161
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You can watch Tony Flemmings great videos on You Tube. Well worth checking out.
John T
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01-07-2022, 07:44 PM
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#7
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Guru
City: Centreville MD
Vessel Name: Resilient
Vessel Model: Helmsman Trawlers 38E
Join Date: Dec 2020
Posts: 1,510
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Quote:
Originally Posted by phillippeterson
Anyone have a video of a Fleming at 8kts? Or any other similar S/D at 8kts?
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What is it you are trying to see? Wake? Or what life is like at 8 knots?
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01-07-2022, 09:24 PM
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#8
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Senior Member
City: lockhart
Join Date: Nov 2020
Posts: 384
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Quote:
Originally Posted by psneeld
No video... but my 40 with a 34 WLL throws a big enough wake at 6.5 knots that slowing down a bit is required to not upset marina dwellers.
The WLL is what determines speed and wake.
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Quote:
Originally Posted by ksanders
No video but I can tell you that any SD boat over 40' is bow level at 8 knots.
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Quote:
Originally Posted by FWT
What is it you are trying to see? Wake? Or what life is like at 8 knots?
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Hi, I was thinking wake. But, now that you mention it, what is life like?
This thread could be dead real soon or it could get interesting.
It seems like 8 knots is a good speed for a lot of boats, even a Fleming
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01-07-2022, 09:30 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: 7,556
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How a boat behaves at 8 kts will depend a lot on its length. For my 38 footer (33.5 waterline), 8 kts is plowing water, making a big wake, etc. 6.5 or a hair more is a much better speed for slow cruise. A good SD hull may be able to go a little faster before hitting the wall (mine is a planing hull), but not necessarily.
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01-07-2022, 09:30 PM
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#10
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Guru
City: Guelph
Vessel Name: Escapade
Vessel Model: 50` US Navy Utility trawler conversion
Join Date: Nov 2015
Posts: 2,432
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Quote:
Originally Posted by phillippeterson
It seems like 8 knots is a good speed for a lot of boats, even a Fleming
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I'm with psneed. If you're not planing, it's all about WLL.
8 knots is a great speed for a 64' LWL boat.
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01-07-2022, 09:39 PM
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#11
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Guru
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,743
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Quote:
Originally Posted by trawlercap
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Trawlercap,
Your boat is FD.
Extremely over driven in top pic.
Ask Codger2 for a picture of his 34 Halvorsen at 8.5 knots.
__________________
Eric
North Western Washington State USA
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01-07-2022, 09:56 PM
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#12
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Senior Member
City: Bend, Oregon
Vessel Name: JoAhna K
Vessel Model: 58' Bill Garden Trawler 1952
Join Date: Aug 2020
Posts: 293
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Quote:
Originally Posted by Nomad Willy
Trawlercap,
Your boat is FD.
Extremely over driven in top pic.
Ask Codger2 for a picture of his 34 Halvorsen at 8.5 knots.
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Yes 10 knots is top end for that boat.
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01-07-2022, 10:17 PM
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#13
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Guru
City: San Diego
Vessel Name: SEA WOLF
Vessel Model: 1979 CHB 41 Trawler
Join Date: Feb 2020
Posts: 999
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If someone will lend me a Fleming for a few months I'll take all the video you want.
Here's our CHB 41's wake at about 8kts
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01-08-2022, 02:10 AM
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#14
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Guru
City: Szczecin
Vessel Name: Dryade
Vessel Model: Trawler 72
Join Date: Mar 2012
Posts: 738
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Sorry no video
but two photo of our Long-Cours 62 at 11.6 kts
32T, 60' Lwl, 16'4" beam, 14'8" beam at wl
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01-08-2022, 08:01 AM
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#15
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Guru
City: Centreville MD
Vessel Name: Resilient
Vessel Model: Helmsman Trawlers 38E
Join Date: Dec 2020
Posts: 1,510
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Quote:
Originally Posted by phillippeterson
Hi, I was thinking wake. But, now that you mention it, what is life like?
This thread could be dead real soon or it could get interesting.
It seems like 8 knots is a good speed for a lot of boats, even a Fleming
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Because I have a Helmsman 38 on order, as you might imagine I have collected some clip links as I shopped. The one below shows life at 7 knots under the eye of a training captain. At one point one can see the 7 knot speed on the chart plotter. At this speed one has time to think, assess, react.
Below are a few promo videos that appear to be filmed at 7-8 knots.
This is a smaller boat than what you are asking about but perhaps it might be helpful.
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01-08-2022, 09:15 AM
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#16
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Senior Member
City: Hobe Sound
Vessel Name: Kumatage
Vessel Model: Grnd Bnks 46 cl
Join Date: Aug 2020
Posts: 229
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A screenshot. GB 46, 44'dwl. 12kts. CAT 3208 x 2, 2083rpm. 16.8gph total
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01-08-2022, 10:09 AM
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#17
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Guru
City: Rochester, NY
Vessel Name: Hour Glass
Vessel Model: Chris Craft 381 Catalina
Join Date: Aug 2019
Posts: 7,556
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Quote:
Originally Posted by Steve1.0
A screenshot. GB 46, 44'dwl. 12kts. CAT 3208 x 2, 2083rpm. 16.8gph total
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That looks almost like a planing wake to me.
For comparison, the pictures below show my boat's wake at 5.5, 6.5, and 17 kts.
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01-08-2022, 10:55 AM
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#18
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Senior Member
City: Hobe Sound
Vessel Name: Kumatage
Vessel Model: Grnd Bnks 46 cl
Join Date: Aug 2020
Posts: 229
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rslifkin At 12kts it is almost planing. I think I was surfing a bit in that shot. It's a screen shot taken from a video clip.
I don't know how to post videos to the forum.
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01-08-2022, 10:58 AM
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#19
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Senior Member
City: lockhart
Join Date: Nov 2020
Posts: 384
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These are all awesome. More. More.
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01-10-2022, 02:30 PM
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#20
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Guru
Join Date: Feb 2010
Posts: 1,161
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H38E Video
[QUOTE=FWT;1066437]Because I have a Helmsman 38 on order, as you might imagine I have collected some clip links as I shopped. The one below shows life at 7 knots under the eye of a training captain. At one point one can see the 7 knot speed on the chart plotter. At this speed one has time to think, assess, react.
Nice looking H38E videos, I like the one filmed in San Diego, looks a little familiar.
John T. - N4050, N4061, N3522, H38E former owner
Marshall Marine Sandpiper - current owner
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