Embedded Files
CO2 Rail Car Dragster
CO2 Rail Car Dragster
Template Build & Research
Template Build & Research
Building one design of a CO2 powered dragster following a guide, this is used to gather research for our own uses in the project.
Construction:
Construction:
This shows the complex design features used to create the car. Obviously this is not every step of the process, just some of the highlights.
Basic shape car is build from
Cutting away material
Adding cockpit
Cutting out holes of CO2 canisters, which is what powers the car
Revolve feature of one of the two rims used on the car
Adding text to rear tires
An axle used in assembly
Assembly of a tire & rim
Mating the cartridge into place
axle mated into place
Mating wheel & rim assembly to washer on axle
distance mate that keeps wheel close to car
Final Assembly
Final Assembly
Final design after following tutorial
Drawing:
Drawing:
Assembly Drawing
Assembly Drawing
Drawing of car
Flow Simulation Data:
Flow Simulation Data:
Using a SolidWorks program, we are able to simulate air moving across the car in a realistic way similar to real racing condition, to gather data, we look at the lift and drag values.
Graphs:
Test 1
Test 2
Drag:
Drag:
Test 1
Test 1
Test 2
Test 2
Lift:
Lift:
Test 1
Test 1
Test 2
Test 2
Flow Sim Animation:
Flow Sim Animation:
Visual of air impacting car
Animation
Animation
Notice both the change of color, which shows pressure, and how the air, represented by arrowed, moves around the shape of the car.
Original Design
Original Design
Thumbnail Sketches & Research:
Thumbnail Sketches & Research:
Sketches that show the design of the car before it is designed in a 3D design software.
The Design
The Design
Car Assembly
Car Assembly
Full car assembly before a redesign
Drawing
Drawing
Body View
Body View
Construction Images:
Construction Images:
Space for wheels
Axle Hole
Propulsion Chamber
Guideline holes
Space between guidline holes
Extrude Cut
Sweep
Boss/Base Extrude
Front Wheel Assembly
Rear Wheel Assembly
Flow Sim Data
Flow Sim Data
Surface Plot
Surface Plot
Different colors indicate different amount of force on car
Graph displays data of simulation
Shows the the results of flow sim
Redesign
Redesign
Fillets
Fillets
Used to smoothen out corners
Rounding Hole
Rounding Hole
Making the guidline hole more aerodynamic
Improved Air Flow
Improved Air Flow
Smother curves around the body of the car will result in better areo qualities.
Fillet Feature
Fillet Feature
Shows the process of making a fillet
Flow Sim Data
Flow Sim Data
After Redesign
After Redesign
Notice the significant improvements around the guidelines holes and other parts of the body of the car
Graph displays data of simulation
Shows the the results of flow sim
Test Print:
Test Print:
Printed Piece
Printed Piece
Notice damage caused by lack of supports
Slicer View
Slicer View
STL. File
STL. File
How solid works breaks up the part for the slicer
Rear View
Rear View
This is just a very small piece of the full car
Printing Car:
Printing Car:
Race Day:
Race Day:
Repairs:
Zip ties needed to be added to the car to hold in CO2 cartridge, this is because of cracking in the 3d print.
Race 1:
Race 1:
Results
Results
My car won its first race in a heat against a competitor, with a time of 1.618.
Finished Car
Finished Car
Cut axle to correct length, hammered it through the holes in the body of the car.
Race Videos:
Race Videos:
Multiple angles of the race, includes slow motion videos as well
Race Results:
Race Results:
John Lang - 1.618
Mekiah Johnson - 1.789
Race Information:
Race Information:
Max Velocity: 50.68 ft/s
Track Length: 60 ft
Car Mass: 68 g
Calculations:
Calculations:
Race 2:
Race 2:
Start
Start
Weight
Weight
Race 3:
Race 3:
Results
Results
Set Up
Set Up
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