FORD TRANSIT TEST RIG
CAD diagram showing solar wings unfolded to their horizontal position and the wind turbine mast raised.
We had the basic design in mind, as shown in these CAD diagrams of the Swann. But we needed to gain some practical experience of the proposal, to include installing hydraulics, electrics, and making sure the calculations for lift and mass were correct.
Theory is all very well, but when we have to build the Swann, it helps to have cut metal and come to grips with hydraulic connectors, hoses and controls.
CAD DIAGRAM: The Elizabeth Swann is shown here with a wave piercing hull. She is of trimaran configuration with active outrigger hulls (or sponsons) that allow the vessel to trim for very efficient running. She has solar wings that fold for storms and track the sun, and a wind turbine on a mast, that can be raised and lowered and furled in high winds.
PRACTICAL EXPERIMENT 2019
With the generous help of an engineering student from Belgium, the Foundation funded the development of a test rig designed to improve knowledge of the proposed wind turbine mast and folding solar wings, part of the design concept of the Elizabeth Swann. A Ford Transit was chosen as the donor vehicle to give us mobility, where workshop facilities are modest and space limited.
As with the design of the boat, we used a CAD program to work out the angles, to be sure the Transit van could contain and support the test rig, and then to dimension the parts for cutting steel sections and then to fabricate the parts, using MIG welding equipment for joining. We only had 3 months from start to finish to complete this phase of the test rig.
Our guest from Liege, spent another 3 months in Belgium working on a computer program to control the lifting and lowering of the boom, in relation to safe wind speed.
WELDING: Fabricating the prototype masts in steel.
FABRICATION: Jigging the bearings for the wing shafts.
RASPBERRY: Programming a Pi to control the mast raising/lowering with measurements of wind speed via two anemometers for positional safety.
WINGS: Diagrams of the roof mounted frame, showing solar wings folded and opened.
HYDRAULICS: Twin power packs, for mast raising lowering and furling operations.
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