Broadwater 5.1

Broadwater 5.1


For our builders we offer full size printed bulkhead/ frame patterns, printed on 24" wide paper which are taped together to provide fulls size outlines. Using the full size patterns and detailed plan sheets, the parts can be accurately marked and cut out. All Plan sheets are printed on Architectural D (24" x 36" ) paper except for the full size frame patterns. 

Broadwater 5.1 Plans Price

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 favourite 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.

We do not offer CNC files for this Design

Broadwater 5.1
Broadwater 5.1

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 90 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.


- Overall Hull length ......16ft- 9in ( 5.1m)
- Beam ...... 7ft (2.13m)
- Deadrise @ Transom ...... 15 degrees
- Engine shaft length ...... L/S (20")
- Recommended Hp ...... 90 Hp
- Fuel Capacity ...... -120 litres ( 31.7USG)

- Construction …. Epoxy Fibreglass Plywood Composite Construction


 The following list of materials is approximate and intended for calculation of approximte costs. We offer no guarantees of accuracy. The list is for all plywood in the construction of the hull, deck and interior. Allowance has been made in the quanties for about 10% wastage. Resin and glass quanties are only approximate.

6mm (1/4") - 13 Sheets
9mm (3/8") - 11 Sheet
12mm (1/2”) – 2 sheets

RESIN AND GLASS (For coatings and reinforced areas)
Epoxy Resin & Hardener - 120 kg (32 US gal)
400-450gm (12oz) Double Bias - 80 m (  85 yards) - (Cheaper to buy a 100m roll)
3 kg (6.6 lbs) glue powder (Cabosil)
4 kg (8.8 lbs) Q-cells (fairing Powder)

The materials list above covers all the supplies for the boat as designed.
Useage of materials may vary due to several factors. For example, a experienced builder will use less resin. Our resin calculations are based on a 50% glass content. Options, customization and variations within your build will also effect the bill of materials and outcome.

Anyone can Build a Boat. Its that Easy

Just about anybody can build a boat using the Bowdidge Marine Design Plywood Composite system. This method eliminates many members that ordinarily require fitting, fairing, and beveling. Thus, it's ideal for beginners. A jigsaw and drill are about the only power tools required. The resulting boat is incredibly light weight, strong, and durable.

This quick and easy boatbuilding method consists of plywood planking panels cut to shape from patterns in the plans which are "stitched and glued" together at the seams. Such a boat can be assembled in a matter of hours after cutting out the parts.

The stitching is done with plastic electrical ties passed through small holes along seam edges. These are zipped tight to hold the panels together. The glue is then applied between the stitching and also on the inside in a cove-shaped fillet along the seams, along the outside and inside. After curing, the "stitching" is removed and the gaps filled. Then the hull is covered in glassed.

Plans for all our designs include instructions, material layouts, and material listings. In addition, the patterns provided are precise, since they're taken from the actual 3D modeling and CAD systems.

Broadwater 5.1 Construction Gallery

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The Broadwater 5.1 Gallery

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