Car AC, Garmin 955, Specialized TT Face Sock

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• 3:00 on when to open your car windows
  • Average vehicle has a CdA of 0.6, so only ~11kW or 14hp used to overcome aerodynamic drag for the average car at 100kph
  • Average vehicle AC units consume 1.5kW - 3.0kW (2 - 4hp). 1.5kW / 2hp costs the equivalent of adding 0.11CdA at 100kph
  • The higher the speed, the greater the CdA hit of opening windows
  • Not much hard Cd data on open windows vs closed windows, but a convertible vs a hardtop delta is 
    • 0.32 Cd for a hardtop and 0.36 Cd for a convertible
• 13:45 Michael’s first impression of the Garmin 955
  • Solar feature is underwhelming
  • Excellent optical sensor
  • Still full of bugs
  • Very good (seemingly) GPS tracks
• 25:30 Andrew remembers the Platysense Marlin 
• 28:00 Speculating about the new Specialized TT helmet face sock