Eurocopter to reveal new concept on "E-Day" in Geneva

Another compund helicopter

http://www.flightglobal.com/blogs/as-the-croft-flies/2010/04/may-4-is-e-for-eurocopter-day.html

http://www.flightglobal.com/blogs/as-the-croft-flies/2010/03/eurocopter-hybrid-patent-a-preview-of-x3-or-x4.html