As we have mentioned and detailed in a previous post on this blog we have previously developed and planned a Catamaran, as part of a class challenge for the students to build a boat.
The student concerned put a considerable amount of work into the project - but initial trial prints raised some issues from a range of areas. The student themselves had the design undergo some significant testing to identify the errors in printing, and also look at what solutions that they might be able to use to resolve issues.
In the first version, two small join holes, created when two linked parts of the boat met, caused a minute hole which allowed water to enter ultimately causing the boat to list having taken on water.
The bow of the boat was designed more as a space that looked appealing, instead of being more water tight, so once water came into contact with the front of the boat it tended to cause it to start to take water onboard.The mast was designed to look appealing and not be functional, so the students reinforced it making it stronger. The steering wheel is only visible in early designs as when the rafting was removed the steering wheel needed more robust attachment.
The base of the boat was reinforced with additional shapes and additional blocks to ensure that it was waterproof. Previous testing on the early versions of the print identified that it was unable to sink.
The dimensions of the print have not changed, as the base is the same that is 140mm long, 120mm across and the cabin being 60mm high. The print time was eight and a half hours, while this is significant, this is a particular detail process with a specific intention to complete a working boat, it features a high degree of difficulty.
The water proofing that was attempted was initially using blu-tack. This was discovered to be acceptable but the student wanted to upgrade to use a hot glue gun as he felt that would be more succesful.
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