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DiggsNWT
Joined: 14 Jul 2010 Posts: 64
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Posted: Sat Jun 21, 2014 11:17 am Post subject: Hull Planing Profile |
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Just curious...
What can a boat buyer read into pictures of a boat model while on plane? Some boats are spraying at the helm. Some are spraying at the back 1/3 but seem to have a bow high attitude. Some have the front 1/2 of boat out of the water with little spray and the boat seems almost level.
Diggs
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WILSON
Joined: 17 Jun 2005 Posts: 352 Location: Mexico City
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Posted: Mon Jun 23, 2014 1:29 pm Post subject: |
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The less boat in the water = the less drag = the more efficient the hull design.
The bigger the spray, the greater energy wasted not pushing the boat forward....
_________________ Wisdom chases me, but I´m faster |
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Smoke Show
Joined: 05 Oct 2011 Posts: 77 Location: Fort Nelson, BC
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Posted: Thu Jun 26, 2014 10:26 am Post subject: |
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by adjusting trim on the pump you can change this a bit as well I learned.
_________________ 2014 18' Ali-Craft LSA/212 |
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Jimmy
Joined: 18 Feb 2014 Posts: 3 Location: Red Deer
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Posted: Thu Jun 26, 2014 5:45 pm Post subject: |
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one thing you can't tell from a picture is speed which may affect what you are seeing
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MISSBHAVEN
Joined: 20 Jun 2005 Posts: 310 Location: Grande Prairie, Alberta
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Posted: Tue Jul 01, 2014 4:55 pm Post subject: |
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It mostly depends on what you want to do with the boat and what the boat is designed for;
Heavy duty 4X4 - Shallow water 8 degree hull- keep boat as flat as possible
light duty 4X4 - all around pleasure, 12-16 degree hull- spray about 1/2 to 2/3 forward. The boat will be less choppy the farther forward the spray is, but will start to bow steer if you get the spray too far forward.
Corvette - Max speed 16 -20 degree hull- bow high (within reason) with spray as far back as possible.
Boats are like vehicles, "specific design for specific use" Too many people want a heavy duty 8 degree shallow water boat (1 ton 4X4) that will handle and have the high speed of a 16-20 degree sport boat (Corvette)
You have to decide what you want to do with the boat and then buy a boat with a hull designed for your needs. The most important thing is to buy a boat from people that know river boats, as in buy direct from a Canadian manufacturer, not from an RV dealer that doesn't know the difference between an 8 degree and 12 degree boat.
Your spending a lot of money on something that can open up new worlds for you and your family so it's very important to buy from someone that can answer all your questions as you learn about this wonderful sport!
_________________ It's always the Navigators fault! |
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h2orescuemedic
Joined: 16 Jul 2011 Posts: 18 Location: Missouri
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Posted: Tue Aug 18, 2015 7:38 pm Post subject: |
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So were does a 20 degree Step hull Radius Keel fit into the load hauling and fun to drive in this mix?
_________________ 16' jet boat |
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boosted
Joined: 04 Jun 2009 Posts: 378
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Posted: Wed Aug 19, 2015 8:04 am Post subject: |
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Here is the thing with jet boats. many a person has tried to find the perfect hull for everything and in the end they all find out the same thing. theer isn't one. alot of them end up with two or more boats to get what they want for there particular day of boating.
20 deg steptechs are nice as long as they keep the weight down and have enough power to run them. there is where the problem starts. For a 20 deg steptech to run well you need to give up the windshield a whole bunch of interior space and usually only go with 2 or three people if all you have is 350 hp. Up it to a alum LS at 600 hp and you can start adding weight and still have a fun boat. i have seen guys figure they can add big power (BBC) and then run lots of extra fuel tanks, storage compartments,etc. and have a boat that does not perform as well as they want. Delta pads handle weight better than steptechs but are slower and don't turn as well. Tunnel hulls are even more sensitive to weight and do everthing aggressively so tehy are not for everyone. my .02
_________________ Mark
Lets go back I think we missed one rock! |
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h2orescuemedic
Joined: 16 Jul 2011 Posts: 18 Location: Missouri
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Posted: Wed Aug 19, 2015 6:36 pm Post subject: |
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Thanks, Sounds like either a 8 degree or a Delta pad boat for the way i currently use my boat.
_________________ 16' jet boat |
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Arthur Outlaw Eagle Admin
Joined: 28 Oct 2006 Posts: 1654 Location: On the rocks
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Posted: Sun Aug 23, 2015 2:48 pm Post subject: |
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