Monday, April 5, 2010
Design of the jig
(top) - All componets for jig
(middle) - Aft view of jig
(bottom) - Front view of jig
The jig is designed on having a vertical frame at a one-foot spacing from the bow to the midpoint with one and a half foot spacing from the midpoint to the stern to reduce the amount of materials used in the jig.
My intentions with this jig design were to employ the use of CNC routing to create very accurate profiles and positioning mechanisms so that it would drastically reduce the amount of time spent on constructing and aligning the jig. The panels will slot into place on vertical boards that are attached to a table. The table will be constructed out of 140 x 45 mm pine for the edges to create a very stiff and sturdy table (as each full sheet of 18mm MDF weighs approx 30kgs). This is important because of how the jig is setup, without the use of battens to fair in the sections it must be very stiff to provide the accurate hull shape.
Another design consideration with the jig was transport and storage. With this design the flat jig MDF panels can be laid flat in a small box trailer and the table tied on top or stored flat somewhere saving space, also the table will act as a work bench once the hull is flipped over and a sheet of form ply is placed on the table top.
The design was given to the CNC cutting workshop just before Easter and are expected to be completed in mid to late April. At this point hopefully centreboard and rudder will be completed and the focus can be placed on the jig and hull shell.