Precise tooling, moulds and fixtures, makes for an accurately reproduced yacht.
Quality assurance in build begins with attention to tooling.
A good friend and fellow toolmaker, Steve, kindly converted my CAD files and machined the moulds-plugs on his CNC milling machine.
This image show machining the plug for one side of the central spine and keel casing mould.
The hull plug was machined from a stable, well seasoned slab of Australian rain forest hardwood, Crows Ash Teak. Who would have thought a race-winning IOM would lie within a 350 year old tree ( I counted the rings. ) felled 50 years ago!
The deck, stem, transom and internal mouldings plugs were machined from aluminium billets. Fittings positions and alignments were drilled precisely from the CNC while the plug was in position on the table.
Extra work was done using my own conventional machinery. Here shown drilling the core location for the mast ram.
These plugs were finished, painted, polished and then from them, epoxy production moulds were made. The location dowels align the keel and rudder cores accurately on the centreline.
Shown are production moulds, made from the CNC machined plugs, with location cores for the keel, rudder and fittings accurately in place.
The keel, rudder and ballast moulds were CNC machined directly from aluminium and steel billets and then hand finished and polished ready to make the lead and epoxy mouldings.
All carefully made mouldings are assembled accurately within a series of alignment fixtures to form the finished yacht. The spine and keel casing sides are firstly bonded together then trimmed for the rudder servo mount, mast well and sheet post. The one piece deck moulding has hardware mounted and bonded from beneath, then the hull, stem, transom, spine and deck are aligned and bonded together in one fixture.