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[STEM] Engineering Master List

Engineering Design Process

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Part 1: Problem

Part 2: Research

Part 3: Specifications

Part 4: Design

Part 5: Prototype Testing

Part 6: Redesign

Part 7: Final Design

Part 8: Performance Assessment

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[STEM] Engineering Part 1

Engineering Design Process

Problem: The need to create both a single and double hulled canoe and test it out for data.

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[STEM] Engineering Part 2

Engineering Design Process

Research:

Research for the project first started with learning about the Hokulea. A worksheet was given to be filled out by using the Hokulea site. There, an overview of the traditional Hawaiian Wa’a canoe was provided along with the history of how it originated. A movie was also watched detailing the journey along with different cultures that still practice in sailing without the use of technology.  

After this, individual research between groups was conducted. Our group researched typical canoe designs along with what types of materials would work well in order to float and move in water. 

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[STEM] Engineering Part 3

Engineering Design Process

Specifications: Less than three feet in length and width, one single hulled canoe, one double hulled canoe, capable of moving on it’s own by wind, motor, etc.

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[STEM] Engineering Part 4

Engineering Design Process

Design:

The first prototype design was 20cm by 10cm for the single hulled canoe and 40cm by 25cm for the double hulled canoe The sail was 20cm by 15cm for the single hulled canoe while the double hulled canoe’s sail was 30cm by 22.5cm. The double hulled canoe also had a platform in between the two canoes and it was 20cm by 15cm with it overlapping each canoe at the edge by 10cm. 

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[STEM] Engineering Part 5

Engineering Design Process

Protoype Testing:

The first prototypes of our group’s canoes floated in the sink, however the sail did not function well. Both the single and double hulled canoe did not move as well as planned. The sail was slightly flimsy and also uneven. Due to that we changed the design of the prototype for the day we tested the prototypes in the mini pool that Ms. Lumabao brought.

On the day where our group tested our new prototypes in the mini pool the prototype boat also did not sail in a straight line. Instead, it sailed in circles.

Vlog:

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[STEM] Engineering Part 6

Engineering Design Process

Redesign:

For the final design, each canoe was 38 centimeters long (contrary to the design it is actually 2 cm per square and not 2 inches) and had a width of 8 cm and a height of 4 cm. Both the sails were 30 cm wide and 29 cm in height. For the single hulled canoe the outrigger was 25 cm and the two wires that connected the canoe to the outrigger were 16 cm. As for the double hulled canoe, the platform between the two canoes overlapped 2 cm at the edge and had a 14 cm width along with a 20 cm length.

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[STEM] Engineering Part 7

Engineering Design Process

Final Testing:

Data:

Prior to the final testing of the canoes the outrigger of the single hulled canoe broke off. Due to this happening, the single hulled canoe was unable to stay balanced when placed in the water. In order to receive the data for the single hulled canoe a sail was not used an instead the canoe moved using man-made waves.

Video Footage of Trials:

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[STEM] Engineering Part 8

Engineering Design Process

Performance Assessment: 

The wa’a speed is more than the wind speed due to the fact that when testing out the canoes instead of using man made wind our group used wing created by a fan. Also, in the case of the single hulled canoe our group used man made waves in order to propel the canoe forward.

There were a couple of errors for the trials. The first error would be that our single hulled canoe’s outrigger broke prior to the testing. This caused our data to be slightly incorrect due to how heavily we relied on man made waves instead of wind in order to move the canoe. Also, an error in the trials was that our group’s timing wasn’t from exact start to finish. There was a small amount of lab in between announcing start and finish of the canoe’s voyage to when the timer started and ended.

Our group’s wa’a design should not be considered when building an actual wa’a. The reason for this being that they were not done with the intention of people actually riding in it. The materials that we used in order to build it would not likely be able to carry a person since they were not very durable as noted when the single hulled canoe’s outrigger broke before trial testing could even start.