#18: Use of wind tunnel + moving belt/dyno as alternative RLD method:
Status report by BMW (WLTP-08-22e) was presented. TF RLD prediscussed the proposal and supports the concept in principle. Work continues. Equipment and measurement method of moving belt dyno (WLTP-08-24e) were presented by Folko Rohde (VW) as basic principle.

India requested more detailed background information on the development of this new method in a form of a technical report. A more detailed progress report, incl. this background information, is expected by BMW in meeting #10, with a preview in meeting #9. It is also expected that the information will be given in the formal technical report which will be provided together with the GRPE working document for amendment of gtr No. 15. Initiative of Technical Gtr Sponsors (JPN, EC) is necessary.

UTAC presented comparison results (WLTP-08-23e) between coast down and windtunnel(WT)/chassdynamometer(CD) method. WT+CD offer a better repeatability & reproducibility than the track method. More data is expected from VW.

Initial gtr draft text of this new method was outlined (WLTP-08-25e) for wind tunnel and moving belt regarding procedure and equipment. Repeatability criteria have to be developed based on validation measurement results. Draft will be discussed further in detail in the task force and presented for confirmation in IWG meeting #10.