36 - Aerodynamic Breakdown Analysis

3:00 a primer on the Virtual Wind Tunnel6:15 a dissection of Andrew (and his bike)BARS 4.4%FOREARMS 6.0%FORKS 3.7%FRAME 4.4%FR WHEEL 2.7%GEARTRAIN 7.0%HEAD 1.4%L FOOT 3.7%L LEG 12.9%R FOOT 4.8%R LEG 27.7%R WHEEL 0.5%TORSO 10.0%UPPER ARMS 10.8% (stop flexing, Andrew!)10:00 Andrews VERY aerodynamic head13:00 the components of drad: surface (viscous) drag and pressure drag18:45 Andrews VERY un-aerodynamic legs25:00 surprisingly ‘draggy’ forearms 26:15 and upper arms28:00 drivetrain drag33:00 Andrew’s overall bike vs rider drag contribution: 23% vs 77%35:45 the ‘Skinny Andrew’ prototype: no measurable improvement36:45 the ‘submarine gut’ advantage39:30 the ‘Skinny Arms and Legs Andrew’ prototype: 2% improvement41:15 aero vs instagram41:45 wheels are already quite aero.43:45 aero optimization priorities 1. Good bike fit2. Aero helmet3. Aero bars4. Front wheel5. Rear wheel 6. Drivetrain7. Bike frame48:30 don’t mount bottles on seat tubes!Check out our very first episode on why humans aren't fast. Here's an example of how to make legs aero in this video form the world of speed skiing. To have your very own virtual wind tunnel analysis performed, reach out to Michael at X3 or use this page to find a service partner near you.