**Acknowledgements**

We would like to thank to Mr. Hiroki Ura and Mr. Takashi Yajima of the Aerodynamics Research Unit, Japan Aerospace Exploration Agency (JAXA)'s Ministry of Education, Culture, Science and Technology's Advanced Research Platform Operation Promotion Project "Wind and fluid Engineering Platform" for their enthusiastic support in getting this important data using their wind tunnel.

We also thank Aisin AW Co., LTD. for its financial support and manpower support during measurement in the wind tunnel.
