36 - Aerodynamic Breakdown Analysis
from Endurance Innovation Hosted by Michael Liberzon
3:00 a primer on the Virtual Wind Tunnel 6:15 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 head 13:00 the components of drad: surface (viscous) drag and pressure drag 18:45 Andrews VERY un-aerodynamic legs 25:00 surprisingly ‘draggy’ forearms 26:15 and upper arms 28:00 drivetrain drag 33:00 Andrew’s overall bike vs rider drag contribution: 23% vs 77% 35:45 the ‘Skinny Andrew’ prototype: no measurable improvement 36:45 the ‘submarine gut’ advantage 39:30 the ‘Skinny Arms and Legs Andrew’ prototype: 2% improvement 41:15 aero vs instagram 41:45 wheels are already quite aero. 43:45 aero optimization priorities 1. Good bike fit 2. Aero helmet 3. Aero bars 4. Front wheel 5. Rear wheel 6. Drivetrain 7. Bike frame 48:30 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.
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