dustywings
Well-Known Member
Hi Rob
Great project and really looking forward to it unfolding... any photos yet?
Great project and really looking forward to it unfolding... any photos yet?
Fifty Feet of Grey (steel)
- Thread starter Robg71
- Start date
vas
Well-Known Member
looks like we have to wait for a while,
project currently looks something like this:
or more like this:
(only pic I could find with numbered pieces, although this is bites...)
cheers
V.
Robg71
Well-Known Member
Thanks Vas, that's about right for now.
Plates have been nested and cutting looks pretty much like that.
I'm slightly out the loop for the next month but will keep you all updated.
Plates have been nested and cutting looks pretty much like that.
I'm slightly out the loop for the next month but will keep you all updated.
rustybarge
Well-Known Member
I love the twin bollards at the bow and the big spring cleats, but i was wondering about the single bollard on the stern.
Is this for towing a dinghy?
I have tried using the lighterman's hitch on a single bollard, but i'm not convinced how safe it is to permanently moor a boat. Basically it's not really a knot.
My local tour boat has single bollards on all corners, and the lines always look like they are about to fall off the cross bars.
Yes, i know the cross bar is not supposed to take the load, but 99% of boaters use it for that purpose.
Robg71
Well-Known Member
The bow bollards are not going there. Hopefully we will fit them on to the deck, and have roller fairleads welded through the hull. (Welded or clamped, need to be able to get in to service the rollers.
Fitting a minimum of two cleats midships, as I dont think there are enough on that photo.
And more than likely a cleat aft, as opposed to the bollard.
Certainly on my boat the midship cleats are too small and struggle to get two ropes on.
Fitting a minimum of two cleats midships, as I dont think there are enough on that photo.
And more than likely a cleat aft, as opposed to the bollard.
Certainly on my boat the midship cleats are too small and struggle to get two ropes on.
longjohnsilver
Well-Known Member
Rob, what's your timeline for the new boat? What a great project to be involved with, presumably you've got a team of people involved with offering advice and making decisions? Must be difficult at times, especially when you're blowing bubbles for weeks on end.
Robg71
Well-Known Member
We are looking at about 12 to 14 months.
I have a good team behind me, the two chaps at the boat yard, who are very experienced (used to work for tim a PJ in the states, the designer as well, and also other friends within the boating industry.
I/we bounce ideas about, and make decisions from there. Ultimately the end decision is mine, but I rely on there input as well.
I have a good team behind me, the two chaps at the boat yard, who are very experienced (used to work for tim a PJ in the states, the designer as well, and also other friends within the boating industry.
I/we bounce ideas about, and make decisions from there. Ultimately the end decision is mine, but I rely on there input as well.
JSYmartini
Well-Known Member
When I built my rib I must have spent a thousand hours researching and speccing every little component, on top of actually building the thing. With a 50' motorboat to spec, I don't envy you...who am I kidding I'm jealous as hell!
My best advise - upgrade your broadband!
My best advise - upgrade your broadband!
Robg71
Well-Known Member
I'll pass your advice re broadband on to the skipper 
Fwiw our Internet is shat at best....
At worst it's a no go....
Fwiw our Internet is shat at best....
At worst it's a no go....
MapisM
Well-Known Member
Good choice, I for one surely prefer that arrangement.
You might wish to consider also a samson post, as in the pic below.
I found it very convenient when I had the opportunity to use it, because it allows an independent handling of two lines, either sides.
Also a roller in the middle of the bow (right in front of the samson post) would be nice, imho. Handy for an anchor snubber, for instance.
Just some thoughts...
Robg71
Well-Known Member
Will be two bollards, either side, port and stbd.
Anchor windlass and possibly a hydraulic post. Trying to keep the deck space clear as reasonably can. Hawse pipe for anchor to anchor pocket. Tow bridle/anchor snubber will be made up to fit in through the fairleads.
Anchor windlass and possibly a hydraulic post. Trying to keep the deck space clear as reasonably can. Hawse pipe for anchor to anchor pocket. Tow bridle/anchor snubber will be made up to fit in through the fairleads.
MapisM
Well-Known Member
Well, can't disagree on the "clear deck" principle.
Of course the samson post scores negatively in this respect, but imho its pros are worth the compromise. Each to their own, anyway!
What do you mean by hydraulic post, a winch driven by the windlass, as the two shown in the pic which I posted?
If so, don't forget the tricky requirement I mentioned in the stabs thread, i.e. the need of either keep he engines running to use it, or have a genset-driven pump to keep the hydraulic system pressurized (though you would need that anyway for STAR stabs, eventually).
If you're not fitting stabs initially, you would probably keep the engines on while using the windlass anyway, but it's a bit annoying for winches alone.
Of course the samson post scores negatively in this respect, but imho its pros are worth the compromise. Each to their own, anyway!
What do you mean by hydraulic post, a winch driven by the windlass, as the two shown in the pic which I posted?
If so, don't forget the tricky requirement I mentioned in the stabs thread, i.e. the need of either keep he engines running to use it, or have a genset-driven pump to keep the hydraulic system pressurized (though you would need that anyway for STAR stabs, eventually).
If you're not fitting stabs initially, you would probably keep the engines on while using the windlass anyway, but it's a bit annoying for winches alone.
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Robg71
Well-Known Member
My theory is the engines would be running during anchoring etc anyway.
We are looking into a battery/genset powered backup pump as well.
We are looking into a battery/genset powered backup pump as well.
MapisM
Well-Known Member
I see, fairenuff.
I don't think that a battery powered pump can be man enough, though.
At least, all the STAR installation I've ever seen had a massive 3-phase pump, hence requiring not only the genset, but also a VFD to convert single into three phase.
Not sure if there are around smaller DC pumps good enough for the windlass/winches, but I doubt it.
I don't think that a battery powered pump can be man enough, though.
At least, all the STAR installation I've ever seen had a massive 3-phase pump, hence requiring not only the genset, but also a VFD to convert single into three phase.
Not sure if there are around smaller DC pumps good enough for the windlass/winches, but I doubt it.
Robg71
Well-Known Member
This is purely for winches, not for any stabs, (if fitted).I have a hydraulic specialist at work looking in to it.
Even if its at a lower speed(flow rate), as a backup.
Even if its at a lower speed(flow rate), as a backup.
MapisM
Well-Known Member
Aha, interesting, let us know his findings.
I've never heard of a DC pump as a backup for the hydraulics, albeit at lower flow rate.
Otoh, if you already think of fitting STAR hydraulic stabs in the future, maybe it's worth going for the AC pump anyway?
Pretty sure you need a high flow/high pressure pump (and actually, also a compensation tank) for them to work...
I've never heard of a DC pump as a backup for the hydraulics, albeit at lower flow rate.
Otoh, if you already think of fitting STAR hydraulic stabs in the future, maybe it's worth going for the AC pump anyway?
Pretty sure you need a high flow/high pressure pump (and actually, also a compensation tank) for them to work...
Robg71
Well-Known Member
We have used back up low flow systems for years at work, on previous vessels, driven from emergency generator. (Bearing in mind our emergency set is still in the'flippin big' category. Allows the power to go further.
This is still all hypothetical as such and can/will change depending on stabs etc...
This is still all hypothetical as such and can/will change depending on stabs etc...
MapisM
Well-Known Member
LOL, knowing what you mean by "at work", why am I not surprised to hear that you've got some pretty substantial emergency equipment...? 
Robg71
Well-Known Member
The boat I work on has very little hydraulics, auxiliary systems but the main bell winches are electric. Triple lift, so we can lose two wires and still recover safely to within air dive range.
Full active and passive heave compensation is a mix of hydraulics and electric. In 12m seas we still dive, and you feel zero bell movement when on the sea floor, (a few metres above it, to be correct)
Full active and passive heave compensation is a mix of hydraulics and electric. In 12m seas we still dive, and you feel zero bell movement when on the sea floor, (a few metres above it, to be correct)
jfm
Well-Known Member
Rob, I'd recommend a pto hydraulic pump on both engines as the means of back up especially if you're having a hydraulic bow thruster. That's all you need until you fit star stabs, at which time you would need the big electro hydraulic pump.
