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Old 12-24-2013, 07:31 PM   #41
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Craig, Art and many others,
What a bunch of great guys.
Merry Christmas to all!
Very pleased I'm on your list Craig. Please let me know when you're about to come up.
"Willard back in the water"? Mine? That won't be till early August .. probably.
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Old 12-24-2013, 07:38 PM   #42
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It is really simple. If the boat has much more than 100 or so horsepower (capable of exceeding "hull speed"), it's not a trawler. ... Most participants here have fast sedan cruisers. But that doesn't mean we can't be friends.
Mine as 200 hp aside does that mean mine is not a trawler I don't think so there are many other characteristics which determine a trawler than just having a 100 hp engine
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Old 12-24-2013, 10:23 PM   #43
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Can we change the title of this thread? Merry Christmas!
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Old 12-24-2013, 10:26 PM   #44
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gwkiwi,
Perhaps Mark could have said 7hp per ton.
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Old 12-24-2013, 11:06 PM   #45
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You're correct, Eric. ... Still, I'm happy with 6-minus horsepower per ton.
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Old 12-25-2013, 12:22 AM   #46
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Quote:
Originally Posted by manyboats View Post
Craig, Art and many others,
What a bunch of great guys.
Merry Christmas to all!
Very pleased I'm on your list Craig. Please let me know when you're about to come up.
"Willard back in the water"? Mine? That won't be till early August .. probably.
I will be looking forward to August!
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Old 12-25-2013, 12:37 AM   #47
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Can we change the title of this thread? Merry Christmas!
Gotta admit it is a bit annoying. I was thinking of soliciting those in this thread for title ideas then thought better of it

Feel free to PM me your ideas though because I could always use a good laugh. If one of the other mods don't come through here and rename it first I'll change it tomorrow when I return to civilization and my laptop.

Merry Christmas!
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Old 12-25-2013, 03:02 AM   #48
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How to define trawlers in listings?
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Old 12-25-2013, 07:30 AM   #49
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If you're going to go trawlering at hull speed you better NOT do it w a full disp boat. Going hull speed requires a semi planing hull. One must plane to some small degree to go forth at hull speed w any degree of grace and efficiency. A semi planing hull is required. So displacement trawlers are limited to at least 1/2 a knot below HS. One full knot is better and more than that w bigger boats.
Good grief! "Hull speed" is just a rule of thumb, a very broad thumb at that. Trying to nail down such specifics as .5 kn and linking that with some undefined type of "efficiency" really is just mental masturbation.

The only reason all those rules of thumb exist for small boats is that it just isn't worth anyone's cash or time to do the type of analysis required to generate data that is worth anything. Not that it would be worth anything after the boat was delivered anyway because the boat and its operator are not equipped to monitor and respond to the factors which determine how efficient the boat is or might operate.

All these long-winded discussions full of pseudo hydrodynamics are akin to using an electron microscope to check the position of a cut line then making the cut with a chainsaw.

The link below takes you to a discussion of how the most efficient operating speed is determined for a ship. Don't have a hissy fit and start whining about how ships and little boats are different ... waterflow and the energy it takes to move a body through water are the same. The purpose of my posting the link is to show that in order to derive the type of information that is being tossed around here with regard to hull form, speed, and efficiency, a degree of calculation and testing is required that, like I said before, is so far beyond reason for recreational boats that it will never happen.

If "analysis paralysis" is the objective then the stuff posted about hull forms and this endless back and forth about displacement vs power vs yadayadayada is quite effective. If you want to know if a boat suits your pocketbook and imagination, go look at one that appeals and talk to the owners to find out what it costs to run and how fast it goes for the money you are comfortable spending.

http://www.mandieselturbo.com/files/...4_02%20low.pdf

By the way, in the 45 pages of hull and propulsion formulas and examples in that document ... the term "hull speed" does not occur even once.
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Old 12-25-2013, 07:42 AM   #50
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RickB....the reason people use this forum is because they DON"T have to waste their time reading 45 pages of something that isn't discussed here, by Pascoe, or over on boatdesign.sink.

All you have to do is post one, relatively poor picture of your boat and immediately the TF "sperts" can tell you if she is seaworthy, topheavy, efficient, full displacement or otherwise and if you include another pic of it underway...exactly what peed she is making and the amount of semi-displacement or not she is.

The not so expert (determined by their lack of the ability to do the above and don't spend that mich time on boatdesign.sink)....will discuss endlessly why you shouldn't call it a trawler despite the vast majority of the boating world that immediately says "nice trawler" when they walk past you boat at the dock....
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Old 12-25-2013, 07:43 AM   #51
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Quote:
Originally Posted by Daddyo View Post
How to define trawlers in listings?

Daddyo, that would require an agreement on the definition of "Trawler", not an easy task. As you can search YW and similar sites by Diesel/gas, number of engines, etc, perhaps you brokers can have them add "hull type" as well. This may narrow the search somewhat if somebody wants a SD or FD "trawler type" vessel, it may narrow it down a little. This still assumes the listing is completed accurately.

You may consider changing the thread name to Definition of a Trawler. as that is what the discussion has turned to.

Happy Holidays everyone!
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Old 12-25-2013, 09:34 AM   #52
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In the case of our hull it really is more full displacement then semi. Even hull type isn't clearly definable.

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Old 12-25-2013, 09:38 AM   #53
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As we get ready to throw the turkey in the oven and feed a very large tribe, I wish all a Merry Christmas.

Now that is off my chest, a boat is just a boat until it as left San Francisco Bay. Then just maybe, after burning a few tanks of fuel on the open ocean, it can be deemed a trawler. Until then it is a picture taking platform.
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Old 12-25-2013, 12:24 PM   #54
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And the winner is...


Quote:
Originally Posted by Daddyo View Post
How to define trawlers in listings?

Mark, you can pick any prize you wish from the third shelf. There where some honorable mentions in my PM inbox that made me laugh out loud but in keeping with being a moderator I'd better just leave them in there.

Thank you all for playing this special Christmas edition of "Name That Thread".

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Old 12-25-2013, 04:06 PM   #55
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And the winner is...





Mark, you can pick any prize you wish from the third shelf. There where some honorable mentions in my PM inbox that made me laugh out loud but in keeping with being a moderator I'd better just leave them in there.

Thank you all for playing this special Christmas edition of "Name That Thread".

Now you've hurt my (our) feelings!!

Happy New Year - Soon to BE!!
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Old 12-26-2013, 11:07 AM   #56
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I'd like to thank my family and the moderators for believing in me. It all started back when I was in my mothers womb that I first............................................. .................................................. ...............................and that's all I have to say about that.


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