seapiper sea trial

SeaPiper 35 – Launched for the first time

We launched SeaPiper #1 !

She is floating right on her lines, is cute as heck and offers wonderful stability due to her hull shape and relatively high ballast factor. We did some initial trial runs up and down the river to get a feel for how the boat performs.

SeaPiper #1 is not completely finished yet: there is some interior finishing to do, transom doors need to be added, bow roller installed, and the side boarding doors need a bit more work, but this won’t take long. We were anxious to get her in the water to get some preliminary test data.


We were most pleasantly surprised by her characteristics: the boat tracks really well, and even though she has a narrow beam she is not tender or “tippy” at all. Once power is applied she picks up speed smoothly and quickly and steering is crisp and responsive. We are going to refrain from listing sea trial speed and rpm data at this time because we need to correct the propeller pitch some more: we have the boat under-propped a bit right now. So stand by for final data, but performance and handling are looking really good ūüôā



Below some more pictures:



And one last video:



Closing in on launching #1

Time for another update:

We have made major strides over the past few months: The foredeck and pilothouse on SeaPiper #1 have been joined to the hull, the mid cockpit deck is installed. In the pictures you can clearly see the very extensive center cockpit drainage (six oval ports on each side of the cockpit).

After placing the shaft log we installed the engine, prop shaft, rudder and steering, built and pressure tested the tanks and installed them. We have a total of six tanks on board: three water tanks (140 USG total capacity), one waste holding tank which is 32 USG and two wing fuel tanks of 135 USG each for a total of 270 USG.

There is a significant amount of plumbing going into the boat: the four watertight compartments make the boat virtually unsinkable but also mean we have four individual bilges each with a bilge pump system. There’s raw water systems for the main engine, a separate system for the genset, separate fuel systems for main engine and genset, and then our fresh water system: pressure pump, water heater, all the hot and cold lines, etc.

At the same time we have the electrical systems going in: batteries, RBS battery switches, a custom designed electrical panel, inverter/charger, interior and navigation lights, engine panel, and all operational switch gear.

And most importantly: all these systems need to be cleanly installed with good access everywhere and excellent labeling which will enable any owner to easily understand the system layout for easy troubleshooting should the need arise. We place a lot of value on this.

Pretty soon we will be able to launch #1 for its initial sea trials. Keep an eye on this news blog for updates on SeaPiper!




SeaPiper #1 and #2 coming together

We are assembling SeaPiper #1 and #2 at this time. The main FRP parts for both boats have all been laid up, and after assembling these we will start laying up hull #3 while the outfitting and finishing is going on for #1 and #2. For me personally it is really exciting to see these first SeaPiper vessels coming together after all this time working on the design. As expected: #1 is turning out to be the most time consuming with lots of little tweaks being done which are translated into tooling changes ensuring that all the components for future boats will go together easily.

I am truly pleased with how the boat is turning out. Spending a tremendous amount of time fine tuning the design up front has paid off: This vessel is going to be strong and seaworthy, and offer well laid out and comfortable accommodations for its size.

Currently all the FRP tanks are being installed, the engine and shaft log is going into #1 and we are building the rudder systems which will be installed next. Once the interior is fixed in place permanently we will create the pilothouse to hull joint and install its roof top. The foredeck will then be joined to the hull and then final outfitting can begin.

Below are a few pictures of the build:








Hull #1 out of the mold

We have made good headway: we just finished hull #1 and removed it from the mold.

SeaPiper’s hull is constructed of heavy solid laminate below the waterline and has been cored above the waterline which gives it tremendous stiffness and impact resistance and great thermal and sound insulating properties. This¬†hull is built to last.

The GRID pattern of bulkheads is built out of laminated Nidacore material making it strong, very stiff and utterly maintenance free.

Currently we are building tanks, decks and interiors, and we will update this blog soon with more installed components.

Keep coming back here for more news or reach out to get more information.




More tooling being built

We are making progress with building the tooling for SeaPiper: the hull plug is completed, the main interior molds are done, the tank molds are finished, the mid cockpit got its own dedicated mold: lots has been going on with lots of time spent on ensuring the perfect fit between the various components.

Currently we are building the female mold off the finished hull plug, and in the very near future we will have hull #1 arriving at our San Diego facility. We will then start building up SeaPiper #1.

In the meantime we have been receiving more and more components from our various suppliers: hatches, port lites, trim pieces, interior lights, navigation lights, pumps, steering components, the main engine for SeaPiper #1, exhaust parts, etc..

Soon we’ll have more updates!


SeaPiper - Pilothouse

SeaPiper – Pilothouse

seapiper_head_shower_mold IMG_0785 forecabin_interior_mold seapiper_ph_roof_plug  seapiper_mid_cockpit_deck_moldseapiper_forward_deck seapiper_main_interior seapiper_fuel_tank_portseaiper_fuel_tankpilothouse_forwardpilothouse


Forecabin Deck

Mold Building and Fairing

We are making major progress on SeaPiper. The hull plug is being faired, and we have started on most of the major molds that are needed: the pilothouse and galley interior, the aft cockpit, the forecabin deck, and the forecabin interior.

The hull is starting to look pretty nice and the other components are taking shape too. Major progress!

A few pictures showing various stages of construction:


SeaPiper Hull Plug

SeaPiper Hull Plug


Main Interior Mold

Main Interior Mold

Aft Cockpit Plug

Aft Cockpit Plug


SeaPiper 35 hull plug

Building SeaPiper tooling

Over the past few months we have been building tooling for SeaPiper! We have sold SeaPipers #1 thru #4 so we are proceeding with all the FRP tooling that will be required to build the boats: a female hull mold, deck molds, superstructure molds, etc. It is very exciting to see it all come together now.

The hull plug (which is needed to build a female mold) is currently in the final stage of construction and is being fully faired. It will be used to create the female mold for the hull.

We are truly excited to see the boat take shape.

Keep an eye on this NEWS blog for the latest updates.




SeaPiper Engine Choices

SeaPiper is offering two engines: The Betamarine BETA 85 and the Yanmar 4JH110.

The standard SeaPiper engine will be the Betamarine BETA 85. This new engine is based on the modern Kubota engine family and shares most of the core components and technology with these engines. Betamarine has a long history of marinizing Kubota engines and their engine power packages have an superb reputation for high reliability. Beta engines have been used for a long time in sailboat repowering worldwide.

The beauty of this engine is the unparalleled simplicity: there are no engine electronics at all. The engineers have been able to meet EPA Tier III requirements without the use of complex electronics: the BETA 85 is a 2800rpm direct injection diesel with turbo, heat exchanger, a mechanical line pump and a relatively heavy flywheel. As long as there is fuel this diesel engine will run, offering smooth operation and tremendous ease of maintenance. SeaPiper will offer about 10 knots of speed with this 85 hp engine.

Betamarine BETA 85 Engine

Betamarine BETA 85 Engine

We also offer SeaPiper with the new Yanmar 4JH110. This engine is a modern electronically controlled common rail diesel engine with rotary injection pump. Its engine block is completely aluminum and engine RPM is higher at 3200rpm with a power output of 110 hp, meeting EPA Tier III requirements. Yanmar has a long standing reputation offering highly reliable engine packages. The 4JH110 is incredibly smooth and quiet and will give SeaPiper a speed around 11 knots.

Both engines are equally good choices for SeaPiper, with a different usage in mind: for maximizing range, economy and ease of maintenance the Beta 85 will be a great choice. For maximizing speed, and silky smooth car engine like running the Yanmar 4JH110 comes out as an equally great choice.

Check out our SeaPiper Engine Choices page for more detailed information on both engines.

Yanmar 4JH110 engine

Yanmar 4JH110 engine


SeaPiper 34 Profile with Crew

SeaPiper with crew on board

Owners probably would not consistently be using SeaPiper with this many passengers and crew on board, but we felt the above image may be helpful to get a feel for the space with people in it. The stand ins you see in this image are all 5ft-9in (1.76m) tall which happens to be the average male size in the US. The picture gives a real sense of the headroom on board, engine access, galley space etc. You cannot see the helmsman since he/she would be to starboard, but the viewing height whether sitting or standing at the helm is the same as the people in the center cockpit have.

Note the guy (or gal) in front of the engine (normally you would keep the large cockpit hatch over his head open of course!). The headroom here is actually 39 inches, which enables great access to the engine from the front and sides which is far superior to what¬†is the norm in boats her size. SeaPiper offers even more engine room access: in the salon there is another large 24″ x 30″ hatch that offers access behind the engine, exhaust system and shaft seal. Plus you’d probably use this hatch for routine inspections underway in bad weather.

Also note the headroom throughout the salon, galley and forecabin, seating height in the salon (note height of the windows) the height of the cockpit coamings and the height of the railings. It is also easy to see the steps into the forecabin, the two steps from the salon down into the galley and the two steps up to the aft deck.

We will create some more 3D renderings to show more of the interior with people on board and these will be given their own page on this website. Keep an eye on to stay updated on SeaPiper and her production.

Seapiper 34 - view from starboard

Use Examples for SeaPiper 34

Cruise the Caribbean:

Go cruise the Caribbean. SeaPiper has fantastic range, offers comfortable motion, ample speed plus great space on deck as well as in the salon and galley. She will have a wonderful sun shade over the complete cockpit and superior ventilation throughout the interior, both in the forecabin as well as in the main salon. Her shallow draft allows true gunkholing in shallow waters. Her comfortable salon and cockpit allow for great entertaining options.


The Great Loop:

SeaPiper is perfect for doing the Great Loop. Her long range, great cockpit seating and comfortable pilothouse/salon combination are a real asset. She has a cockpit aft as well as the large center cockpit and therefore docking and mooring will be a snap, even single handed: walk out of the pilothouse and drop a line over the side.


Long Scuba Trips:

A great use of SeaPiper is for weeklong scuba trips. Her wonderful access to the water with those boarding ladders make this boat ideal. There is lots of space in the cockpit, and there is lots of space in the storage room under deck for scuba equipment: air tanks can be stored vertically, fins, wet suits, masks etc. You can stay on the boat all week if you equip her with a dive compressor.


Fishing off the Atlantic Coast:

Go fishing off the Atlantic Coast. SeaPiper offers plenty of cockpit area to make this very enjoyable with up to about 4 people. Remove one or both deck boxes to create more cockpit space and make this kind of use even more convenient. She has great range and will allow use very far out if need be.


Lobster and Crab fishing:

Use SeaPiper for small scale lobster or crab fishing: her side entry doors and open cockpit with the deck boxes removed allow for plenty of crab or lobster pots on deck and space to operate and it will be a lot of fun. Ideally mount a very short mast with lifting boom on the factory installed mast support and you can hoist pots with ease. With a bit of creativity the catch could be put in bins in the storage room under the cockpit.


Pacific Northwest:
Cruise the San Juan Islands in the Pacific Northwest. SeaPiper is easy to maneuver, has wonderful directional stability, and is perfectly suited for this environment. Keep the sunshade/rain shade up to make use of the cockpit in any kind of weather. Her practical floorplan with large galley offers comfortable living and the separate forecabin gives a sense of privacy.


Travel to Bermuda:

Travel to Bermuda, which is easily within reach of SeaPiper. Her strong scantlings and four independent watertight compartments will offer great peace of mind on a longer passage like this one.


More uses for SeaPiper 34 to follow! Keep an eye on our News Blog for updates on the SeaPiper 34.

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