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Old 26-02-2010, 00:15   #151
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Wow
Just had a look at the installation of the engines, hot water systems etc on those antares 44's and have to wonder how they do it.

The sides of the boat and deck must be very high off the water.
With a draft of 1.2 metres with mini keel, it appears to be simmilar in hull draft as mine which is about 600mm.

My deepest part of the bilge/tanks on a 50 footer is about 350mm and I have 2 metres above that to the ceiling/deck of the hull meaning that my side decks are about 1750mm +- off of the water.

Now if these have a full sized engine and hot water tanks under floor (about 900mm?) and again, around 2 metres head room in the hulls that makes the side decks about what, 2400 off the water?

Big jump for us old guys onto a concrete marina berth as we come in to park.
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Old 26-02-2010, 01:05   #152
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Tropic cat,

I personally like to have a head accessable from aft cockpit on bridge deck but it is difficult on a 46 ft vessel without some other compromise. Check the head/wet area one the FF66

Much easier on a larger vessel.

http://www.freeflowcatamarans.com.au...nterior1.aspxn

Catmando,

The FF sole is around water level so allowing for for headroom of 2 meters and composite deck a fraction over 2m for deck height. Not a small vessel. The compromise is you have all fuel, water, motors centrally located for a well balanced vessel with a good motion.
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Old 27-02-2010, 07:22   #153
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I don't personally understand how breaching an aft motor compartment that is sealed from the rest of the boat can flood the rest of the boat. Many of you will remember the video of the freighter ramming a Fountaine Pajot (Belize I think) cat that had both engine compartments flooded. The story is that a whale popped up under the starboard (?) saildrive which pushed it through into the engine compartment. Then that compartment flooded enough to allow water to cross from that engine compartment to the other. The owner then called for rescue.

I've looked at the engine compartments of the FP Bahia, Lavezzi, and Marquises and can't figure out how the water can actually get that high in the engine compartments. it would have to flood about 3 feet above the water line. I can see that the loss of bouyancy from 10' of the hull would allow the boat to sink maybe 1' lower in the water, but not 3'.

A comment was made about the foam in the stern being located high in the compartment. Any opinions on that? On my new boat, it doesn't have any foam in the engine compartment. It is located below the aft berth next to the bulkhead separating the berth from the engine compartment. I would think you would want foam low in the hull to displace water if the hull is breached. Being inverted is less likely then being flooded, IMO.
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Old 27-02-2010, 08:43   #154
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Also, when you put nothing in that space, fill it up with sturdy empty PET bottles (tightly closed of course), all the way up to the deck.

cheers,
Nick.
Most of my research into the bottles reveal that the constant heating and cooling of the bottles results in gas escaping from them and not returning resulting in a slightly shrunken bottle and distinct loss of buoyancy.
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Old 27-02-2010, 09:23   #155
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Most of my research into the bottles reveal that the constant heating and cooling of the bottles results in gas escaping from them and not returning resulting in a slightly shrunken bottle and distinct loss of buoyancy.
You mean through the PET material or the cap not closing? The cap can be closed for good using a sealant and although most soda bottles are very thin today, I found old-fashioned thick ones in several places (the Coca Cola bottles in Colombia are such that you can drive a pole into the ground with them!)

I tend so save empty oil bottles and put them in the space of our swimming platform (sugar scoop stern). I never found one shrunken with vacuum inside but I'm also not positive that they don't leak at the cap.

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Old 27-02-2010, 09:32   #156
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You mean through the PET material or the cap not closing? The cap can be closed for good using a sealant and although most soda bottles are very thin today, I found old-fashioned thick ones in several places (the Coca Cola bottles in Colombia are such that you can drive a pole into the ground with them!)

I tend so save empty oil bottles and put them in the space of our swimming platform (sugar scoop stern). I never found one shrunken with vacuum inside but I'm also not positive that they don't leak at the cap.

cheers,
Nick.
Not the cap.
Apparently air can pass over time.
Don't know about oil bottles.
What has been used is the empty 2 liter soda bottles that are so common.

I am using 1 liter saline bottles used to store and deliver sterile saline in the OR.

I will soon start a test freezing and thawing them daily to see the result.
edit: soon is a relative term as the fronts continue with aggravating frequency and the abnormal cold this winter precludes the freezing and warming to the 80's I think the test should use. 80's as a minimum.

Maybe I should toss in an oil bottle too? Goofy caps though.
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Old 27-02-2010, 10:29   #157
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Old 27-02-2010, 16:19   #158
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Some cats are harder to sink than others, obviously....

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Old 27-02-2010, 16:57   #159
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Speaking of plastic bottles for buoyancy, Charles Kanter has another interesting use for them. In preparation for a cyclone he suggests filling them with water to help weigh the bows down.

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Old 27-02-2010, 17:10   #160
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Some cats are harder to sink than others, obviously....

That's an AWESOME photo!!!
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Old 27-02-2010, 17:44   #161
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the above can be found on lolcats ...lol..
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Old 28-02-2010, 01:20   #162
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Would anyone actually carry hundreds if not thousands of pop bottles in their bilges? No way. Please, if you do, take a photo and post it so we can see the installation.
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Old 28-02-2010, 02:47   #163
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Here is a design that is just about to be launched --- Where ?
190 LOA x 124 LWL
No problem with fuel
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Old 28-02-2010, 04:31   #164
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No problem with fuel
WHY?
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Old 28-02-2010, 04:35   #165
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