Car Aerodynamic Testing - 2nd edition

[JulianEdgar]

For anyone interested, I have published a second edition of my Car Aerodynamic Testing book.

Contents:

Chapter 1 – The approach

• The different tests
• Testing techniques

Chapter 2 - Airflow testing with tufts

• What you need
• Airflow patterns with tufts
• Tuft testing a Tesla Model 3
• Tuft testing vortex generators
• Tuft testing a rear roof extension
• Tuft testing a wiper deflector

Chapter 3 – Airflow testing with dust

Chapter 4 – Measuring panel pressures

• Pressure sensing puck
• Reference pressure
• Gauge
• Measuring pressures
• Professional pressure measurement
• Over-car and under-car pressure readings
• Pressure readings in rear spoiler development
• Pressure readings in rear separation edge development
• Pressure readings across a standard under-hood intercooler
• Pressure readings when optimising downforce
• Pressure readings with a rear spoiler and fins
• Pressure readings to show flow attachment on the sides
• Centreline pressures on different car shapes

Chapter 5 – Using pitot tubes

• Using a pitot tube to optimise a rear diffuser
• Using a pitot tube to measure air speeds

Chapter 6 – Measuring lift and downforce

• Ride height sensors
• Measuring the effectiveness of a rear spoiler and wing
• Measuring downforce of a hatch-mounted wing

Chapter 7 – Measuring changes in drag

• Windows open/windows closed
• Ride height
• Rear wing angle

Chapter 8 – Reducing lift and drag

• Reducing lift
• Reducing drag
• Reducing both

Chapter 9 – Fallacies!

• Don’t use a template
• Lift is important
• Lift is not usually caused by flow separation
• Ignore the 10% / 5% rule
• And finally….

Appendix

• Air density
• Equations for pressure, speed and density
• Calculating coefficients of pressure

It's available at the web address below.