Broadwater 5.1

THE BROADWATER 5.1

The Broadwater 5.1 design is a very simple and approachable powerboat design, capable of being the perfect companion to adventures on the water.
Originally designed for bay and open water use, I think she would fit in just about anywhere. The Broadwater 5.1 requirements were simple, she had to be a fast and
responsive cabin boat that would allow comfortable cruising whilst out and about, whether it be fishing or simply a family's day outing out on the water.
With a large forward cabin of over 1.52m (5ft) in length, with wide cabin seating throughout to stretch out and relax, large storage lockers, loads of headroom and room to fit a toilet.

The Broadwater 5.1 has a large helm station for a boat of this size, providing ample room for all those favorite electronic toys and also an area of the boat that
provides excellent visibility, control and shelter. With large storage lockers within the helm station for all those personal valuable items that one carries when out and about,
the helm station within the Broadwater 5.1 is designed for easy reaching and putting you in control.

Behind the helm station, the Broadwater 5.1 with a large cockpit and wide side decks for rod holders and grab rails, she also has side pockets and large lockers aft with
a ton of space in the rear lockers for a flush mounted live bait well, bait board, batteries and more.

SPECIFICATIONS:

- LOA ……16ft - 9in (5.1m)
- BEAM ………7ft (2.13m) overall
- DRAFT/ hull only ………12″ (305 mm) @ DWL
- Deadrise at transom ...… 15 degrees
- FUEL CAPACITY ....... 31.7 USG (120 Litres)
- Max 5 Persons
Horsepower… 115- 140 Hp (max)
Outboard leg length.... 20"
- LEVEL flotation (built as per the plans)

APPROX DRY TRAILER WEIGHT including a 140 hp motor…..1397 lbs
(633 kg ) depending on materials and outboard options* ( This includes a full tank of fuel)

- Construction …. Epoxy Fibreglass Plywood Composite Construction
- Safety standards in compliance with the ABYC standard
- Structure is engineered in accordance with ABS class rules

BROADWATER 5.1 FEATURES

Just some of the features the Broadwater 5.1 includes:

Sleek yet simple and functional lines
Moderate V hull design for bays/ offshore and fishing the estuaries.
Forward cabin with loads of headroom within
Side pockets for all your gear plus more
Large forward deck for anchors and even room for a trolling motor.
Large 70 - 100 litre underfloor fuel tank
Large storage compartments beneath the deck for storage of gear plus a large kill tank when fishing
LEVEL flotation for compliance (we comply to the ABYC standards)
Engineered to "Class" or Commercial shipping standards for those offroad or offshore fishing adventures.
Easily handled by 1 person when trailering
see more below...

It also has a walk-thru transom arrangement leading to a large rear deck for swimming or simply climbing on and off the boat. If you decide to keep her on a mooring,
the cockpit deck is self-bailing with the sole being approx 3 inches above the loaded waterline. Also there is 685mm (27 inches) of height from the cockpit sole to the top of the side decks, which means you'll have heaps of support to lean against when grappling that big snapper or even more important, keeping the kids aboard.

The hull design concept involves a fine entry, long flat buttocks, a variable deadrise throughout and a deadrise at the transom of 15 degrees. This in combination with her chine flats and running strakes to produce lift and reducing drag, prevents squatting and provides a smooth ride as she slices thru the waves.
So with this in mind, we recommend a minimum Horse Power of 90 horsepower, but keep in mind this hull does not need a lot of horsepower to be driven economically at a good speed over the water.

Under the sole, she also has a 100-120 litre fuel tank, giving you the capability, time and flexibility to do more boating, fishing and having a lot of family fun on the water, With a 115 Hp outboard hung of the back, the power to weight ratio of the Broadwater 5.1 will deliver outstanding range too, meaning you can cruise further and faster with better fuel economy.
This maximizes your time aboard - providing more options for any given trip, the ability to go and more money in your pocket, not to mention the pride that comes from building your own boat.

Broadwater 5.1 Frequently Asked Questions

What is included in the Broadwater 5.1 Plans?

In regards to the Broadwater 5.1 plans, it includes:

17 sheets in total (11 x A1 sheet size and 6 x A0 sheet size - full size bulkhead patterns)
Full size patterns for bulkheads/ stem frame and transom
Builders manual
Bill of materials
Over 100 build photo's for you to preview and assist with your build (A picture tells a thousand words" as the saying goes)
Tip's and Tricks" e-book for building your boat
Plus a lot more

Below is an example of the type of plans you receive

Is the Broadwater 5.1 boats Builders Plate Compliant? (Australia/ USA/ Canada and the EU)

Yes.
We use the ABYC standard (https://abycinc.org/). (We do not use the AS 1799 standard, as we feel that this standard is full of "holes). Using the ABYC standard, all boats under 20ft MUST meet LEVEL flotation. It also means that the boat must meet certain stability criteria in regards to traverse stability, wind heeling criteria and max Hp allowed.
The Broadwater 5.1, as designed exceeds the requirements for LEVEL flotation compliance. This covers the boat itself/ outboard/ people and cargo.
This standard is accepted worldwide. (Australia/ USA/ Canada and the EU)

We do not design our boats to meet BASIC flotation. To me, "Basic" flotation is dangerous.
Hope this helps

So what does the term "Ply/Composite" Construction mean?

So… what is Ply/ composite construction?

The term “composite means that if you use 2 or more materials in your construction layup, you must take into account for the mechanical properties of each material used. i.e. with Plywood and glass used we have to take into account for the materials Tensile strength/ Bending strength/ compression strength/ Shear strength and Modulus of Elasticity) in your engineering calculations. When you do this, its now "composite" construction.
Once it passes Tensile strength and bending strength for a particular area, we move to the next section. This method of engineering is applied throughout the whole boat.

Now… simply building a plywood boat and wetting out some glass on it is not composite construction. Its just a plywood boat with glass laid on.

All our Plywood and Strip plank designs are engineered as composites and in this regard, we engineer out boats to “Class” rules. In other words, we use Commercial ship standards. Here we use ABS or the "American Bureau of Shipping (https://ww2.eagle.org/en.html)

Here’s just one small area within one of our designs as an example of the calcs we do with all our designs.

I hope this helps

Mark Bowdidge (MRINA)

Can I get replace the ply/ composite structure with foam core?

No.
By doing so, your:

1/ Making the boat too light. This means the boat will float higher in the water, exposing the chines which in turn results in the moment of inertia of the waterplane being reduced which results in an unstable boat.

2/ Taking the weight out of the bottom of the boat also raises the overall centre of gravity which further adds to an unstable rolly boat. Why? Plywood has a density of approx. 600 kgm^3, whereas foam has a density between 80-240 kg/m^3 (pending foam core used). So in effect, you've taken out between 60% to 87% of the weight that's down low. Whoops. Now you have a serious problem with stability.

3/ The boat will become too "flighty" when on the plane.

BUILD THE BOAT AS PER THE PLANS and you won't have an issue.

Do you provide CNC cut files or kits?

No I do not.
So please don't ask, as refusal may offend