small boat Building

Tewantin Plans

A fast sports boat

made from plywood that you can carry on top of your car. A whisker shorter than “Noosa” but a different boat. 33% wider with taller sides and more volume inside. Max motor size is 15hp, although 6-10hp is ideal. CNC files are available.

Plywood boat - CAD drawing

Why you will fall in love with Tewantin...

I never wanted to pull her out of the water. The feeling of driving this boat was one of gliding, sliding over the water. With her lightweight, smooth bottom and the hull shape. This boat gets on the plane immediately and stays there with little effort.

The hull shape resulted from a lot of trials and refining after the building of the original boat. The shape is an enormous improvement over the original V-bottom, offering greater stability and better planning performance. Now with computer-produced plans, all the parts and shapes are easy to cut and fit together.

Carry her on roof racks. I used to carry her on top of my old Ford XC Falcon. She is light enough to lift alone, otherwise, use a small trailer. On the original boat, I used a 6hp mercury 2-stroke, twin. At 26kg, it wasn’t too heavy for the boat and easy to throw in the car’s boot. She’s too wide to walk down the footpath like “Noosa” but makes up for it once in the water. Tewantin will leave any tinnie in her wake.

What's in the Plans?

The plans include the following PDF multi-page documents and can be purchased and downloaded from your computer, phone or tablet. This is a secure website.

• 1-Welcome PDF  3-pages
• 2-Boat specifications + loading data 2-pages
• 3-Materials lists + tools & safety gear 8-pages
• 4-Build notes (work-table/building the boat) 12-pages
• Drawings-1 (elevation+temp frames) 14-pages
• Drawings-2 (boat frame+details) 9-pages
• Template-1 (6mm Ply parts) 9-pages
• Template-2 (9mm Ply + MFD) 5-Pages

Download links to these files are emailed to you immediately upon payment. You will also be taken to a download page with the above links. You can download the files as many times as you need and free lifetime updates to the plans will be emailed to you when any improvements or upgrades are made.


– LOA (length overall)       = 3.4 m – (11.2ft)
– Beam (max at handrails) = 1.46 m – (58in)
– Transom height  = 425 mm – (16.7in) (motor mount height)
– Height of sides  = 456 mm – (18in)
– Estimated weight of boat = 60 kg – (132lbs) (or less)
– Maximum motor size  = 15 hp
– Recommend motor size    = 6 – 10 hp
– Max payload = 270 kg – (595lbs) (MT boat – no motor or equipment)
– Max payload (with 6hp as max motor) = 218 kg – (480lbs)
– Max payload (with 15hp as max motor) = 178 kg – (392lbs)

What materials do I need?

Below will give you an idea for costing your boat. See the plans for a detailed list and explanations.

Plywood – you don’t need to use expensive grades of plywood or marine ply to make this boat. You can use marine ply if you prefer, and your boat will look even better, when unpainted or varnished, but it’s not required. I designed the boat with economy and ease of material purchase in mind – exterior grade economy plywood will do the job perfectly.

Sheets required:
– 4 sheets of 6mm (1/4”) Note:- 5 sheets required for CNC cutting
– 1 sheet of 9mm (3/8”)

Framing – For the framing, i.e. the side top handrails, seat edges, etc. pine is economical, readily available and perfectly suitable. Or use a higher quality wood such as cedar for lightweight or hard woods – it’s your choice.

Framing required:
Approx 15-20m (50-65’) of pine framing

– Epoxy resin – approx 10 litres (or less) of epoxy
– Filler for epoxy – small amount of each type of filler
– Fibreglass tape  – approx 60m (200’) of 50mm (2”) tape
– Paint – a small amount of paint (there are many options)
– Foam buoyancy
– Motor (1)
– Other assorted fittings

Other Tewantin’s being built

Marco is the builder of this Tewantin in Brazil, working in a limited space in his garage and driveway. The cut panels fit together perfectly, as shown in these photos.

He used the stitch and glue method and his own version of scarfing the plywood, CNC style, without scarfing the plywood panels first.

Using the templates, it’s easy to cut the shapes of the hull panels to fit together exactly. Like a jigsaw.

Built with aluminium

Here is a fine example of the first Tewantin built in metal. Graeme from New Zealand has kindly allowed me to share a couple of pics he sent me.

Graeme’s done an outstanding job, cutting his boat from aluminium and welding it up.

Plans format

All three boat plans share the same format:

– Illustrated build notes written for first-time builders, full of tips and advice
– Material lists for the boat and suggestions for tools and consumables
– Suggestions for safety gear, epoxy, fillers and mixing ratios, etc.
– Plans include drawings to build a work table, use the table for other jobs too
– Tewantin plans also include drawings for temporary frames to assist assembly
– 3D overview plus dimensioned 3-view elevation drawings
– Dimensioned template drawings for all plywood parts

Plywood boat at speed

Tim Weston Boats