blender's hair dynamics...
...won't import to unreal engine4, what a pitty!
...then I tried to ride my horse following this tutorial: https://wiki.unrealengine.com/Videos/Player?series=PLZlv_N0_O1gaz6eETtIxcmUDnqu5A-8At&video=9ariPx6M33o ... but as my horse is not a static mesh this is the disappointing result:
horse hair simplified
and UnrealEngine4 RUN thanks to these light video-tutorials: https://wiki.unrealengine.com/Blueprint_3rd_Person_Game_Creation_Tutorial_Playlist
a more polished result, some days later:
well done! virtual carrot to keep pulling the chariot: