Force and Pressure Measurement Systems
At 15:40 in
How Does A NASCAR Wind Tunnel ACTUALLY Work? Behind The Scenes in an Official Testing Facility!
What happens here
Gary explains the method of data collection: a balance system located in the basement, beneath the rolling road, anchors the car and measures six distinct numbers simultaneously. These include three forces (drag, side force, lift) and three moments (yaw, roll, pitch). This comprehensive force measurement is the most precise feedback obtained from the tunnel. Additionally, hundreds of pressure taps are embedded in the floor, allowing the race teams to analyze the pressure profiles under the car and understand how ride height and other modifications affect aerodynamics. Gary also addresses a common misconception: the yaw performance of a NASCAR car is primarily controlled by the front of the car, not the tail.
Goal: Understand how aerodynamic forces and pressures are measured.
Tools and materials
- Balance System — Anchoring the car and measuring forces
- Pressure Taps — Measuring pressure profiles on the tunnel floor
What they say
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What they say
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