another idiot with mad ideas, new boat build

[rustybarge]

Dunno how it looks like in LJS boat, but this gives a pretty good idea. All the chests I've seen were rather similar, anyway.
Excellent solution btw. I'd definitely want that, if I were speccing a new boat.

I like it. It's basically a raw water manifold connection box.
Can your arm reach down inside the box to clear debris from the bottom hull fitting?
Looks longer than an average lenght arm to me?
But taking Murphy's law into account, It is a very big hole in the hull, But the top of the sea chest is well above the water line.

Excellent idea.

But: what happens if your boat is drying out on a mud berth?
Doesn't all the muck get sucked into the sea box?
And on a shallow canal you would the same problem?

 

[Robg71]

the thought of being able to retrofit stabs is very valid. and worth considering.
what are the options, I know they are not all hydraulic, but as you say may be worth looking at from the word go.
do you fit a pto off a main engine, off your genset, or have battery powered hydraulic pump???

the sea chest is a very neat solution., at work they are a little bigger strangely enough.

 

[MapisM]

the sea chest is a very neat solution., at work they are a little bigger strangely enough.

LOL, are you wearing your diving equipment also to go down inside them?

For hydraulic stabs there's no such thing as a battery powered pump, the power demand is just too high. To the point that you need a pump driven by a 3-phase AC motor.
Which, if you don't have a 3-phase genset (only common on veeery big boats) means that you also need a converter.
And all of that is only used for stabilization at rest, because while cruising typically you have pump(s) driven by the main(s) via PTO.
The alternative solution (which Bart is right now fitting on BA) is fully electric, driven directly by the genset at rest or by the batteries (via inverter) while under way.

@ rustybarge:
not sure about the length of the chest in previous pic (I just linked a pic I found on the web), but in those I've seen the fittings were reachable.
And I'm afraid I have no experience on mud berths either.
We are used to cruising in proper warm and crystal clear water down here, you know...

 

[Robg71]

I think the principle of KISS should be involved here... keep it simple stupid....
I did read somewhere on here about a type of stabiliser that used some uncommon natural phenomena or physics to work and cant find it...

 

[Erik C]

I think the principle of KISS should be involved here... keep it simple stupid....
I did read somewhere on here about a type of stabiliser that used some uncommon natural phenomena or physics to work and cant find it...

http://rotorswing.nl/

 

[Robg71]

thats the one. thank you

 

[Robg71]

my head hurts looking at electrickery stuff....

how much of this stuff is actually needed.... aaaggghhhh.....

invertors, convertors, chargers, isolators, shunts, panels, gen sets, ..... oooph...

ok, i have the mastervolt catalogue in front of me, and hopefully i can go with a relatively easy one make install.
any other brands I should have a look at.

requirements.....

heavy duty alternators and alternators charges
shore power
generator
chargers
isolation transformer.... (dont want a steel boat fizzing)

power consumers....
nav gear,
lights
12 volt sockets (cigar sockets etc)
entertainment system. (CD/DVD/AM/FM)
possibly, probably a single tv
washer/dryer (only when on shore power or generator)
Dive compressor, (only when on shore power or generator
occasional invertor use.

cooking by gas...

other equipment, bildges, pumps, toilets,

water heat???? not sure here yet
water maker??? not sure here either...

thrusters/anchor... separate battery supplies, (chargers)... possibly use engine start batteries or not??

have i missed anything...

 

[wakeup]

my head hurts looking at electrickery stuff....

how much of this stuff is actually needed.... aaaggghhhh.....

invertors, convertors, chargers, isolators, shunts, panels, gen sets, ..... oooph...

ok, i have the mastervolt catalogue in front of me, and hopefully i can go with a relatively easy one make install.
any other brands I should have a look at.

requirements.....

heavy duty alternators and alternators charges
shore power
generator
chargers
isolation transformer.... (dont want a steel boat fizzing)

power consumers....
nav gear,
lights
12 volt sockets (cigar sockets etc)
entertainment system. (CD/DVD/AM/FM)
possibly, probably a single tv
washer/dryer (only when on shore power or generator)
Dive compressor, (only when on shore power or generator
occasional invertor use.

cooking by gas...

other equipment, bildges, pumps, toilets,

water heat???? not sure here yet
water maker??? not sure here either...

thrusters/anchor... separate battery supplies, (chargers)... possibly use engine start batteries or not??

have i missed anything...

Yes, underwater lights...Lumishores of course. I've just fitted a couple of colour change units to my boat. They are great.

 

[kashurst]

if you are having a generator I wouldn't have gas cooking.
also.....
Nav Lights
Anodes
thrusters need their own batteries other wise you need massive cables
hot water tank
fuel tank(s)
water tank(s)
holding tank?
@6 sea cocks

 

[Robg71]

added, thanks.
I prefer cooking on gas. its quiet, you dont need a genny running.

Bow thruster can have a battery shoved up the front then, and be used with the windlass for the anchor,
stern thruster if fitted can go off the start batteries whuch will be closer. hopefully.
tankage I have down on my list.
6 sea cocks.... I hadnt counted yet... how did you get to that number...

and of course, uw lights
not on the first fix list. but out of curiosity, how much current do they pull... I shall have a look...

 

[wakeup]

I think 5amps per light but I can check spec and get back to you.

 

[Robg71]

thank you.

am looking forward to the boat show tomorrow at crick. its an inshore narrowboat type affair, but the designer is there.


When I was looking at a local marina to keep it and work on, and women said it looked like a tupperware. she got the hump when i said she had zero class or style
no sense of humour either

 

[rustybarge]

The Van de Valk 23 mtr is a similar design to the Bonito, but a couple of million £ more.....

IMO the Bonito is just as nice, and only a few metres smaller.....

 

[Robg71]

I think so,
this will be peanuts in comparison. affordable for me, which i like i just have to be careful where i spend, plan weel, and allow room for improvements down the line where funding allows.

 

[grumpy_o_g]

thats the one. thank you

Or one of these? http://www.seakeeper.com/products_m5500_specifications.php. Just need to leave a space ideally somewhere between the middle and back of the boat that you could get it into.

On the electrics I'd work out roughly what you want in the boat and when you'll want to use it and then work out the electrics. It's an iterative process - jsut add in every thing you want in your dream boat and then start cutting things out until achieve the right compromise of cost, etc. The main thing to remember (bloody obvious but we always underestimate it) is to future-proof as much as possible - so easy access cable runs, good access to kit such as gennies, over-sized cables, lots of spare breakers on the panel, cables where you don't need them yet, etc. Once you have a rough idea of what you want sit down with a good marine electrician who is up to date on the latest stuff like CANBus, NMEA 2000, etc. and see what they say.

 

[Robg71]

I have looked at the seakeeper system. It's a big heavy lump, but I suppose it needs some mass to do its job.
Electrics, thanks for the advice. I pretty much sat down and wrote a list out last night.
I don't think I'm too power hungry. Thought I was being extravagant leaving a washer/dryer on my list.
I'm sure it will get re written a number of times.
I don't need pot washers and stuff like that. I have a sink and a bottle of fairy

 

[vas]

I'm sure it will get re written a number of times.
I don't need pot washers and stuff like that. I have a sink and a bottle of fairy

Rob,

being through all that for some time (mind you working on an existing system and updating, rewiring, adding, removing.
You are right you're going to rewrite the list a few doen times
regarding the fairy, it's fine, but will consume more water. Keep that in mind, if you have a watermaker (or spend most of your time in a marina) fine, if not could be an issue.

Further, give us a % of chances for this massive project going ahead please! Very anxious, as JFM M2 on the way to the Med, Bart's BA got the stabs to do and it's over and no other long threads on the horizon. It's going to be a long dark winter

cheers

V.

 

[Robg71]

Well, I didn't say yes to a new pair of diesels to sit and look at the Vas
I'd say it will happen, just when. So far today I have been talking to various suppliers etc, and getting prices and ideas.
Spent a couple of hours with the designer, who I am going back to speak with again.
The 46ft he reckons comes in at17tons, and excess of 25 knots.
Seen some lovely photos of finished boats.

 

[Robg71]

Ok, I asked if I could post the new design up here. he had no issue.
It has changed the whole appearance of the boat. I prefer version one....

 

[kashurst]

I think I prefer version 1 as well. re 25kns, my boat weighs 18 tons and needs 1000Hp to get to 25 kns ish. With the 2 x 380Hp I think you might be looking at 17 -18 kns max which is still pretty quick. But I have never seen a hull that shape before.