Katana appendage tooling machined directly as female moulds from solid metal… The fin incorporates additional drought so it will be suitable for larger boats such as 10 Raters. It can also be adapted for classes with restricted drought such as the IOM. The lower Reynolds Numbers characteristic of IOM class boats makes it advantageous to use the top part...Read More
As work continues on tooling, the new deck shape is now visible. A good opportunity to share the thinking that led to the chosen layout. Initially a dedicated RC tray moulding was designed with the aim of locating the mass of winch, batteries and servo as low in the boat as possible and close to...Read More
From virtual to reality. The magic is being worked by Aptec Composites. Images courtesy Alex Kryger. Hull plug/pattern (above) and deck plug (below) machined ready for surface finishing. Notice the bonding flanges for mast tubes and centreboard case, as well as all deck features, integrated in the tooling to ensure accuracy and repeatability. The mould flanges...Read More
Some images of the mould files ready to cut. In the case of hull and deck, male patterns will be machined to replicate the finished outer surfaces. Composite moulds will then be taken from the patterns which also incorporate the mould mating flanges. The finished moulds will be made such that they can be closed...Read More
Marblehead foil design presents an interesting challenge because the maximum permitted draft is extremely generous. In most monohull keelboat classes, maximum draft is well short of the crossover where additional righting moment gained becomes outweighed by hydrodynamic and structural considerations. For most classes, draft can therefore be regarded as fixed (always go to maximum). In...Read More
Katana has the same waterline beam as Octave. Canoe body maximum depth has increased by 2.4mm. Maximum cross section area is unchanged, staying at a value that has proven optimal. Moving some midsection area from the turn of the bilge to the bottom of the hull gives a midsection that returns to being as close...Read More
A sneak preview of our next RM design: Katana. Katana is an evolution of Octave, incorporating improvements in several key areas. The individual changes are small, but sufficiently numerous to cumulatively warrant a new designation. This decision has been made with existing customers in mind as it will give them a clear option when placing...Read More
We now have comprehensive feedback on the Octave design. Qualitative and quantitative tests have enabled us to evaluate the radical features incorporated into the prototypes in order to decide on values for future production boats.More detailed explanations of the design choices will be published later, but the broad concept has been validated. Overall beam, prismatic...Read More
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