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Automotive aerodynamics is the study of the aerodynamics of road vehicles. Its main goals are reducing drag and wind noise, minimizing noise emission, and preventing undesired lift forces and other causes of aerodynamic instability at high speeds. Air is also considered a fluid in this case. For some classes of racing vehicles, it may also be important to produce downforce to improve traction and thus cornering abilities.
Automotive aerodynamics is the study of the aerodynamics of road vehicles. Its main goals are reducing drag and wind noise, minimizing noise emission, and preventing undesired lift forces and other causes of aerodynamic instability at high speeds. Air is also considered a fluid in this case. For some classes of racing vehicles, it may also be important to produce downforce to improve traction and thus cornering abilities.
RAIL CAR FLOW SIM
These were both ran through a flow sim after all parts were fully assembled to the car.
RAIL CAR BODY
FRONT RIM AND TIRE
Rim and it's revolve
Tire and it's revolve
BACK TIRE AND RIM ASSEMBLY
DESIGNED CO2 CAR
First Flow Sim
The drag is not quite where it needed to be yet, a few fix ups on the car will fix it.
This is the first run of the flow sim
Second Flow Sim
The Second Flow sim showed how the back can be changed to a more aerodynamic state, the first sim was much slower with the big wing on the back. This allowed less dirty air on the flow sim.
The Drag on the car is higher which means the force to the ground will be much higher when traveling at a speed.
TEST PRINT
The Test Print went very well, all holes fit for the parts that were supposed to go in them, sizes matched. This print in the back of the car where the cartrige hole is.
This is the print just beginning.
Final Print
Race Day
Back View
Top View
Bottom View
Side View
Isometric View
This is the Final Product after printed, sanded, and the axles being cut and placed inside the axle holes. The wheels were then assembled onto the axles and spun correctly. The Print took around 3 Hours to complete and needed to be sanded a little once it was done.
First Race
My first race recorded a time of 1.662 seconds. Even though I lost this race, my time was still decent and the car stayed on the ground. I lost by around .30 seconds but still kept the race close. This race kept the car on the ground and the weight seemed correct.
Second Race
My Second race I lost but recorded a better time of 1.615. However, my car did not stay on the ground for takeoff as much as I would have liked it too. Since the first race happened, I think some wear on the tires caused the car to become airborne. The wear of the tires caused the weight to become a little lighter.
Third Race
My Third Race was my fastest time of 1.473 Seconds. Even though I still lost this race, it was my best time of the three races and the car still got some air, but not as much as the second race had.
Velocity Calculation
For my answer, I calculated 41.46 MPH before the car started to slow down.
Post Processing
Once my print was finished, my cartridge hole was just a little too small to where the CO2 canister could'nt go all the way. To fix this, I had to sand out the whole a little bit so that it would fit. Once done with that, it had no problems.
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