Yes, I know...Very optimistic.
Reason was to show how large difference between "what you get from batteries" and "what you get on propeller".
Even if I use very optimistic efficiency koeficients I finally get only 65% of power.
You are also right with Elfin - so far is more "marketing".
However is interesting that it is not new idea.
e-Genius really did some flight test with similar configuration.
However - it was not succefull testing.
Now they follow a bit different way....
Shown at the E-Flight Expo at Friedrichshafen’s Aero 2015, Stuttgart University’s e-Genius had an aerodynamic-looking pod next to one wing, containing an ENGIRO range extender consisting of a Wankel-type engine and a generator. The unit could, as its name implies, help e-Genius go for new...
Stuttgart to Barcelona Dipl-Ing* Ingmar Geiß, Deputy Project Manager for e-Genius with the Institute of aeronautical engineering at Stuttgart University shared the news that e-Genius flew with its range extender for the first time on September 15. He notes that while the battery-powered...