CO₂-Powered Car using a passive air-amplifier for direct jet propulsion. The body was shaped in SolidWorks and tuned with CFD to suppress drag; mass was cut to the minimum consistent with stiffness, and a ground stainless-steel axle with low-friction bearings completed the running gear. The car exceeded 50 m and placed first out of 40 teams.
Compressed CO₂ issues as a thin annular jet that hugs a contoured wall (Coandă effect). The jet creates a low-pressure core that entrains surrounding air (Venturi entrainment), multiplying the mass flow before discharge. The mixed jet exits as a high-momentum plume; by reaction the chassis gains thrust. The device has no moving parts, couples efficiently to the cartridge for short bursts, and avoids drivetrain losses.
