Atomite MkII Twin Cockpit – 9ft Hydroplane


Atomite is a small, simple to build hydroplane adapted to take 1 adult plus 2 kids. A great bit of fun that can be built at home and transported in a van.

New plan revision! Now including full size .pdf pattern files for printing and manual cutting as well as .dxf and .step files for CNC cutting. Files are downloadable at the checkout.

SKU: AMKII-2 Category:


Atomite MkII is a 9ft plywood hydroplane boat building plan and is much the same as the original design of Atomite by William Jackson. This version has been slightly adapted for more practical use. A small forward cockpit was added with an incorporated, slot together seat design. The forward cockpit is great for taking the kids out and will happily accommodate two little ones. The aft cockpit has been narrowed and strengthened to allow the driver to sit up on the side deck.  I have made several corrections to the measurements of frame heights, but other than that the hull and layout is as per the original. There are several parts that I have improved upon from the original plans, particularly with respect to modern manufacturing methods. A nice simple little build that should be a good bit of fun.

This boat is available to purchase as a digital download boat building plan, all files are downloadable directly at the checkout.


Boat Building Plan Set

The boat building plan set is for a plywood skinned version of Atomite MkII. It contains an illustrated PDF document showing assembly of the parts and a 3D STEP model for referencing the general assembly and location of all components. DXF files for all components are pre nested into sized bounding boxes ready for importing to CAD software for CNC cutting. PDF versions are also provided so that full size paper patterns can be printed for manual cutting. Files are supplied in digital format only and are available to download directly at the checkout.

License – This plan set is for single personal use only. Not for resale or commercial production, please contact me if you would like more information regarding commercial licensing.

Boat Specification


  • Length – 2.8m / 9ft
  • Beam – 1.35m / 4.4ft
  • Power – up to 15hp outboard
  • Weight – 85kgs (boat only)
  • Seats – 3