FPB 115 Engine Room, Swim Step, and Basement Layout

FPB 115 engine room layout

One thing we have learned over the years is to allow more space than you think is required for the engine room as the equipment list often grows. The FPB 115 engine room follows this rule, and has space for future growth.

FPB 115 engine detail

The basic systems are shown above. Two six cylinder 300HP diesels, a pair of 27kW gensets, a HeadHunter sewage treatment plant, two big air conditioning chillers, diesel boiler, fuel filters, and two watermakers.

There are a pair of large day tanks, two hot water heaters, and a good sized work bench shown.

FPB 115 swim step lockers

Accessible from the swim step are a pair of lockers. To starboard is an enormous space while to port is a shallow flammable stores locker. Inside the engine room there is storage space under the starboard locker and inboard of the flammable stores locker

FPB 115 engine room annex

The engine room annex has a desk for maintenance paperwork, shelving for manuals, the electrical panels, generator controls, and various other systems related items. The annex space is important in the noise control calculus as well.

FPB 115 basement

The basement area houses a third hot water heater, the battery bank  (2400 amp hours at 24VDC), inverter bank, and stabilizer mechanisms (under the hatches shown above). As this area has full headroom (6’8″/2050mm) there are many options on how the space can be used.

In the commercial versions this area probably goes for storage and perhaps computer racks. WIth a yacht layout the forward half will probably be an annex for the owner’s suite, with the aft section  used for ship’s stores.

Posted by Steve Dashew  (June 24, 2011)

6 Responses to “FPB 115 Engine Room, Swim Step, and Basement Layout”

  1. Gerhard Says:

    Hi Steve,

    this looks great. I’m waiting for my growing pockets to have anytime the money to buy one 😉

    The office room is small, could it be better to open the door into the engine room?
    I would move the rudder hydraulics to the center space – more place to work if needed.

    only my 2 cents.

    Go on, we wait for more.

  2. Steve Dashew Says:

    Hello Gerard:
    The desk in the engine room annex is for maintenance projects, manuals, and vessel records. There are many options for a large owner’s office elsewhere. There are twin rudders so they have to be where shown. However, this gear is very accessible within the engine room, similar to the layout you saw on Wind Horse.

  3. Geoff Says:

    Steve, have you considered (or would it be possible to consider)stern facing pods such as ZF. I believe they can now gear and prop them for trawlers. The manoeuvrability of an intergrated thrust system would make docking much easier and allow an average couple to contemplate this boat. Plus the removal of the rudders should increase fuel efficiency and also have the twin benefits of more compact machinery in the engine room whist also allowing walk through access to the rear lockers swim deck if desired.

  4. Steve Dashew Says:

    Howdy Geoff:
    For our service the azimuth/pod drives have several shortcomings. They are not protected from ice and debris, they are typically less efficient at slow speed than normal props, and we lose the r udder which is required for steering with a get home sail.

  5. Geoff Says:

    Howdy Steve, I wasn’t suggesting you remove the skegs, but rather offer the option to integrate stern facing pods behind/within them, thus negating the need for rudders,(less for debris to hit). If they were geared the same and carried the same sized props why would they lack efficiency. I also believe that bespoke oversize rudder fins could be fabricated on the pods if necessary.Effectively creating a skeg rudder with prop attached. Commercially speaking for couples of average ability, the option for joystick control which would be used every time the boat docked and embarked would far outweigh that for the get home sail which would in all likely hood never be risked even if both engines and drives did fail. Most potential FPB customers would rarely if ever actually venture completely beyond help so would anchor and wait, and many will simply wish to have the comfort, safety (and bragging rights) of an FPB but would be intimidated controlling and mooring a 115 in tight harbours full of expensive yachts. Such an option for the less hardcore might increase business? No big deal, it was just a thought.

  6. Steve Dashew Says:

    Hi Geoff:
    All good points about pods. However, the ZF pods are not nearly as robust as what we normally do. There are commercial pods that are very tough, but these weigh in excess of two tons and cost more than US$50,000 each – and there are two.