#10: Use of Wind tunnel data for combined approach:
Alternative delta CD*A determination (WLTP-08-21e) was outlined by BMW. It was agreed by WLTP IWG that there is a justified need for an alternative determination method and the proposal should be further evaluated. Nevertheless WLTP IWG raised strong concerns regarding the current lack of specifications of simulation tools to ensure equivalency of the alternative determination method. Some basic parameters should be established. Constraints in regard to energy difference should also be considered. Concept will be rediscussed at IWG meeting #9.