Week 15 – Home run

Now the final technical review is just 1 week away. This is a prime example of where the saying “It takes 90% of the time to do 10% of the work, and 10% of the time to do 90% of the work” holds lots of relevance. All the previous time we spent planning out the mechanisms properly and ensuring everything would work by having as much foresight as we had, depended on us being able to fabricate, assemble and test the entire mechanism within a couple of weeks.

Although it may have seemed like the home run at the start of the week, it was all but one as we really had a lot left to do. Regardless, we slaved away in the workshop the whole week, even requesting for an extension to workshop hours till 9pm on Friday and for it to be opened on Saturday and Sunday too. Kudos go to Ms Rubaina for sacrificing her time to open up the workshop and for allowing us to continue perfecting our projects.

We purchased bicycle brakes and tested out the motion of closing the container with them, controlled by a servo motor. Lo and behold, it works spectacularly!

The sense of satisfaction we had was insurmountable, everything was coming along so nicely. On Saturday we assembled the spool servo and found that it worked perfectly as well, although there were still some minor improvements we had to make here and there to ensure that the motion was as smooth as possible.

The frame was fully complete and we riveted all the holes as needed.

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Now that the frame was fully complete, we sealed off the PVC pipes with a silicon sealant, at the various joints. We used a caulking gun with a silicon sealant canister to achieve this.

Next, we measured the weight of the entire vessel using a travel luggage weight meter, and found the weight of the aluminium frame, pipes, and 3D printed brackets to be 3.765 kg.

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As the weight of the frame itself was quite large, we decided to get some life jacket foam to keep our vessel afloat once we let it float on water. Life jacket foam is meant to sustain human bodyweight to keep humans afloat. Hence, we could install this foam around the perimeter of our vessel if needed once we test its buoyancy on water.

Hwee Peng

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