Great day at Friedrichshafen, near Lake Constance, in Germany, where Aero was in session at the new Messe. Good collection of wild and wacky new helicopter ideas, as well as some incredibly safe and sensible ideas.
Whisper is an innovation from EAC, a French company, who envisage running the machine with eight rotors and four battery packs.
Zefhir is a two seat turbine engine ultralight with a FADEC running and starting system and a ballastic parachute in case of trouble.
For all this and more see Helicopter Life summer 2018 edition, out in June/July