Embedded Files
Unit Objectives
Unit Objectives
- Describe three factors important to the performance of a CO2-powered rocket car
- Calculate the area of a solid’s planar face
- Calculate the volume of a solid, and, when given the density, calculate the mass
- Create a new assembly
- Insert components
- Add mating relationships between components.
- Use Additive Manufacturing to build it and make it ready for racing.
Construction
Construction
Here are some of the most important steps towards modeling the first test car
Making the main shape of the body
Cutting out the body into its silhouette
Lofting out the cockpit
Cutting out the hole for the cartridge
Extruding the front wheel standoff
Filleting for the final touches (and aerodynamics)
Final Drawing of the Car (with Decals)
Final Drawing of the Car (with Decals)
Tests with Regular Tires
Tests with Regular Tires
Tests with Thin Tires in the Back
Tests with Thin Tires in the Back
Thumbnail Sketches and Research
Thumbnail Sketches and Research
"The Design"
"The Design"
Initial Design
Initial Design
Modified Design
Modified Design
Final Car Design
Final Car Design
A big worry of my car was that the front wheels' wings were going to come off or break during a race, so I made the wings detachable, so if there is an error, I can quickly reprint the wing instead of the whole car.
A big worry of my car was that the front wheels' wings were going to come off or break during a race, so I made the wings detachable, so if there is an error, I can quickly reprint the wing instead of the whole car.
There was an error with the supports underneath, so there was a bit of overhang
But after a bit of sanding and spray painting...
This is the car!
Race Day(s)
Race Day(s)
Compared to other racers with the same kind of wheels (double thick wheels) I was around average. Two of the groups were faster than my car each race, and two of the teams were slower each race.
Race 1 - 2.445
Race 1 - 2.445
IMG_3164.MOVIMG_6212.MOVRace 2 - 2.138
Race 2 - 2.138
IMG_1913.movIMG_3167.MOVRace 3 - 1.979
Race 3 - 1.979
IMG_3178.MOVIMG_2614.movAnd thankfully, the last race was the one where the safety broke and my car shattered
This was the calculations used to determine the car's max ft/s, and then into mi/hr
This was the calculations used to determine the car's max ft/s, and then into mi/hr
The color coded sections are used to keep organized which race is which time and rate
The color coded sections are used to keep organized which race is which time and rate
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