You are looking at a sea-change in the way we do raw water for the engines.
In the past we have always employed a large through hull or partial sea-chest with a manifold below the waterline. All the engine room raw water consumers fed off this manifold. With a yacht design that will surf as easily as the FPB 78, the boundary layer aft combined with a negative pressure area means a manifold system will occasionally entrain air. The new system makes it much easier for the consumers to clear any air that gets ingested. But wait, it gets better. The valve is now well above the load waterline, so when it requires service it can be removed without hauling the boat. Furthermore, the forward section of the bilge is wide open and easy to clean.
Anybody have an idea why the smaller valve is there?
That small valve is a drain from the aqua lift, so that when the boat is left for a few days humidity is reduced in the exhaust line.
Moving forward now and looking at the raw water system in the forepeak. There are a pair of air con condensing coil cooling pumps, handling five compressors. There is also a washdown pump (top left), a bilge pump (not shown),
and a pair of HeadHunter fresh water pressure pumps.
The trick is to install this stuff so the pumps can easily cope with their work load, while keeping the gear accessible and not ruining too much storage space.
Here is a large grey water tank, probably a total waste of space and displacement, while adding a layer of complexity to the plumbing system. But rules require grey as well as black water, so here we are.
Two of the eventual five air con compressors in this area. The compressors are isolated from their bases with isolation mounts, and then the framework is isolated from the structure tied to the hull.
Lead electrician Deon Ogden is smiling because he has lots of room in which to install the electrical system. The bulkheads of the port systems room will eventually be covered with NAIAD black boxes, along with a host of Maretron N2K components.
Starboard side inverters are now installed along with the auto transformer, as well as junction box for AC system high power switches and terminals (grey NMEA box).
The main panel at the aft end of the great room is coming along quickly.
With wiring and plumbing runs now mostly complete, the prefabricated furniture modules will drop in short order.
The hull side lockers along the hallway to starboard of the owner’s suite have been patiently waiting their turn to shine. Once their doors are mounted and shelves installed, the first FPB 78 will rapidly start to look like a finished yacht..
We will close with a photo of something we try really hard to avoid, but occasionally need to do. That is to rip out some perfectly good work in favor of something better. It is also a tale about how designs evolve. We are looking here at the inner transom, at the forward end of the swim step. It was originally designed at a steep angle: “coal chute” fashion for those of you old enough to recall this era. This approach allowed full headroom when entering the boat from the swim step, but cost deck space and crew cabin/lazarette volume. In the shower a couple of weeks ago there was a Eureka moment, and we realized this simply had to change to vertical. The advantages of deck space above and volume inside were such that it was worth the cost and disruption factor.
This also demonstrates one of the reasons we love unpainted aluminum. It is so easy to make changes…
Although FPB 78-1 looks far from finished, she is coming along very quickly. It won’t be until early next year when her protective furniture covers are removed and she is revealed in all her glory. But we can definitely see the light at the end of the tunnel.