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11 May 2010, 14:29
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#1
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Member
Country: UK - England
Town: Southampton
Boat name: no name yet
Make: Still building it..
Length: 5m +
Engine: 115 hp
Join Date: Jan 2010
Posts: 582
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Rib Ballast
How would one introduce ballast to a rib.?
The only way I can think off is to drill a small hole 3/4" and pour in a mixture of lead shot mixed with resin.
However would there be any way of knowing if the mixture has adhered to the hull.
Unlike a hard boat.
Mixing shot blasting sand and resin then putting the floor back down.
Is the only other option lifting the floor and laying the ballast then a few lams over the top to hold it all in place.
Hopefully I won't need any but I just have to ask the question.
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11 May 2010, 14:36
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#2
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Member
Country: UK - Scotland
Town: Glasgow
Boat name: Thunder
Make: Halmatic Arctic 22
Length: 6m +
Engine: 2 x 150 Etec
Join Date: Oct 2008
Posts: 523
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Assuming that your talking about putting ballast in the bow - a box of some description that holds your anchor with a bit of chain secured into the bow is a good place to start.
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11 May 2010, 16:40
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#3
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Member
Country: UK - Scotland
Town: Inverness
Boat name: none
Make: none
Engine: none
MMSI: none
Join Date: Mar 2007
Posts: 1,908
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I call my ballast the missus, it is even easily moveable
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11 May 2010, 17:16
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#4
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Member
Country: UK - England
Town: Southampton
Boat name: Hissing Sid
Make: Ross Smith Cobra
Length: 6m +
Engine: 200HP Optimax
MMSI: 235038046
Join Date: Jun 2002
Posts: 3,804
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Surely you need to be certain of the amount and location before doing someting so tricky to undo. Does your boat have problem that are not easily remedied some other way?
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11 May 2010, 17:20
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#5
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Member
Country: UK - England
Town: Southampton
Boat name: no name yet
Make: Still building it..
Length: 5m +
Engine: 115 hp
Join Date: Jan 2010
Posts: 582
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Quote:
Originally Posted by Jizm
Surely you need to be certain of the amount and location before doing something so tricky to undo. Does your boat have problem that are not easily remedied some other way?
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I don't yet know as I am still on building it.
Just asking the question
I feel sure I have everything right so far.
It will be awhile before it hits the water.
I am keeping as much as low as I can
Fuel tank may be as much as 180ltrs that's under the floor along with when completed
batteries sett as low as i can..
It's a wait and see thing...
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11 May 2010, 17:34
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#6
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Member
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
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Fit a water ballast tank in the bow like the atlantic 75s ,
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11 May 2010, 17:35
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#7
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Member
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
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Fit a water ballast tank in the bow like the atlantic 75s though youll need a tank and a pump ,
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11 May 2010, 17:35
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#8
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Member
Country: UK - England
Town: Southampton
Boat name: no name yet
Make: Still building it..
Length: 5m +
Engine: 115 hp
Join Date: Jan 2010
Posts: 582
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Quote:
Originally Posted by m chappelow
Fit a water ballast tank in the bow like the atlantic 75s ,
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That's a good idea..
I have left a space for under the deck just rear of the hard nose for storage with a floor hatch I could use the void
for that using a portable fuel tank bag
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11 May 2010, 17:39
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#9
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Member
Country: UK - England
Town: Southampton
Boat name: Hissing Sid
Make: Ross Smith Cobra
Length: 6m +
Engine: 200HP Optimax
MMSI: 235038046
Join Date: Jun 2002
Posts: 3,804
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Quote:
Originally Posted by m chappelow
Fit a water ballast tank in the bow like the atlantic 75s though youll need a tank and a pump ,
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Have a word with cooke on here he may be of some help with ballast systems.
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11 May 2010, 19:57
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#10
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Member
Country: UK - Scotland
Town: Glasgow
Boat name: stramash
Make: Tornado
Length: 5m +
Engine: Etec 90
Join Date: Feb 2006
Posts: 5,090
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Quote:
Originally Posted by Sonar
I have left a space for under the deck just rear of the hard nose for storage with a floor hatch I could use the void
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Thats perfect .. put your anchors and chain in there if youve got room and make sure its well protected by some rubber conveyor matting though to protect the hull from the metal work, you can get some lead shot or similar as extra weight if you need it but I would doubt that .. unless you do go for the 150
If you still got some design choices left, get the fuel tank as far forward as you can too , you will never regret that.
The last hull I used had this configuration, it allowed me to set the console further after, which gave a much smoother ride for the driver than any other 5.7 Ive used .. the boat in question had a fairly shallow dead rise by comparison to some Ive had, but handled like a peach because of the balance
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11 May 2010, 20:26
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#11
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Member
Country: UK - England
Town: Up Norf
Make: Avon SR4,Tremlett 23
Length: 4m +
Engine: Yam 55, Volvo 200
Join Date: Apr 2007
Posts: 5,217
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Quote:
Originally Posted by m chappelow
Fit a water ballast tank in the bow like the atlantic 75s though youll need a tank and a pump ,
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Won't need a pump, the water is forced into a scoop on the stern to fill the tank. Its simple but works well.
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11 May 2010, 20:41
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#12
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Member
Country: UK - England
Town: southampton
Make: Island RIBS / custom
Length: 7m +
Engine: inboard diesel
Join Date: Jul 2003
Posts: 301
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was talking about this over the weekend with someone else.....
why do people want to mix resin and lead shot!!
when we use it as ballast in racing yachts we try and put the lead shot in a moulding and sikaflex / bond it into the hull, then if it has to come out, the job is alot easier than removing a block that is bonded to the hull!!!
can you not just pour the lead shot into the bow / anchor locker and then laminate over the top...
your anchor locker now has a lovely flat floor, and if ever needed to remove the shot, just cut out the laminte, put a new hoover bag in the vacuum cleaner and away you go..... all shot removed.....
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11 May 2010, 20:42
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#13
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Member
Country: UK - England
Town: Southampton
Boat name: no name yet
Make: Still building it..
Length: 5m +
Engine: 115 hp
Join Date: Jan 2010
Posts: 582
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Quote:
Originally Posted by butty
was talking about this over the weekend with someone else.....
why do people want to mix resin and lead shot!!
when we use it as ballast in racing yachts we try and put the lead shot in a moulding and sikaflex / bond it into the hull, then if it has to come out, the job is alot easier than removing a block that is bonded to the hull!!!
can you not just pour the lead shot into the bow / anchor locker and then laminate over the top...
your anchor locker now has a lovely flat floor, and if ever needed to remove the shot, just cut out the laminte, put a new hoover bag in the vacuum cleaner and away you go..... all shot removed.....
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Even better idea many thanks
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12 May 2010, 09:46
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#14
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Member
Country: UK - England
Town: Salcombe, Devon, UK
Boat name: BananaShark
Make: BananaShark
Length: 10m +
Engine: 2xYanmar 260 diesels
Join Date: Mar 2003
Posts: 4,225
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Quote:
Originally Posted by Jizm
Have a word with cooke on here he may be of some help with ballast systems.
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I knew it was only a question of time before I got dragged in ............
You'll need a largeish pipe running down the keel to the transom where you will need a "pick up and dump" fitting that is operated by a control cable and a hand throttle - usually forward to pick up, neutral to hold and back to dump - the tank will need a minimum of double sized vents to allow air and water to escape, this can either be a bow or central ballast arrangement.
Having said all of that I wouldn't bother - unless you're racing or the design is totally unbalanced in which case extra weight probable won't help!
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Cookee
Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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12 May 2010, 09:49
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#15
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Member
Country: UK - England
Town: Southampton
Boat name: no name yet
Make: Still building it..
Length: 5m +
Engine: 115 hp
Join Date: Jan 2010
Posts: 582
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Quote:
Originally Posted by Cookee
I knew it was only a question of time before I got dragged in ............
You'll need a largeish pipe running down the keel to the transom where you will need a "pick up and dump" fitting that is operated by a control cable and a hand throttle - usually forward to pick up, neutral to hold and back to dump - the tank will need a minimum of double sized vents to allow air and water to escape, this can either be a bow or central ballast arrangement.
Having said all of that I wouldn't bother - unless you're racing or the design is totally unbalanced in which case extra weight probable won't help!
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I dont think I should be needing ballast I will just wait and see.
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