It Cools, but It Lifts: The Problem with Project 171’s New Aero

I redesigned the Project 171 bodywork following some invaluable feedback from an ex-F1 aerodynamicist. The goal was simple: fix the cooling and find more downforce—but aero is a game of trade-offs. In this video, we compare the new bodywork to the old design to see exactly how the performance has shifted. While we’ve made great gains in engine cooling the CFD simulation has highlighted a lingering issue I inherited from the previous design: yaw instability. I’m not at the solution for the stability issues yet, but identifying the flaw is the first step to fixing it. I’d love to hear your thoughts in the comments - how would you tackle this problem without resorting to modern vehicle styling? Why not check out the Patreon Page for this Channel: https://patreon.com/CarDesignWorkshop... Previous videos in this series:    • How to Choose Tyres When There’s No Data (...      • Our Top Car Design Tools: Pros & Cons (Dr....      • Professional Aero Review: Where My Design ...      • The Right Location for the Mass in a Bespo...      • Applying Modern CFD to 1950s Design: Proje...   Contents 00:00 Introduction 01:23 New Bodywork 08:26 Gaining Front Downforce 09:27 Cooling Gains 12:20 A Quieter Car 14:04 Profiled Rollhoop 17:04 Lift / Drag and Diffusers 22:33 Yaw Problem 26:52 Conclusion