message: Restored old (wrong) diameter.  Will fix later.
  Fixing this requires fixing the tests which were created based
  on the old diameter.  I'll tackle that in a future PR
diff: @@ -48,7 +48,7 @@ static const float DENSITY_OF_AIR_KG_PER_CUBIC_METER = 1.225f; // kg/m^3
  // Diameters relating to Ethan's Alpha Venturi - II
  // (https://docs.google.com/spreadsheets/d/1G9Kb-ImlluK8MOx-ce2rlHUBnTOtAFQvKjjs1bEhlpM/edit#gid=963553579)
  // Port diameter must be larger than choke diameter
  -constexpr static Length DEFAULT_VENTURI_PORT_DIAM = millimeters(11.5);
  +constexpr static Length DEFAULT_VENTURI_PORT_DIAM = millimeters(14.0);
  constexpr static Length DEFAULT_VENTURI_CHOKE_DIAM = millimeters(5.5f);
  static_assert(DEFAULT_VENTURI_PORT_DIAM > DEFAULT_VENTURI_CHOKE_DIAM);
  