A good presentation. It is nice to listen to someone who takes a realistic engineering approach to a complex problem instead of simply assuming miracle batteries will save it all. Dr. Anderson’s comparison to hybrid and electric land vehicles and how they developed is a good segue to electric aircraft. In the beginning, companies tried to develop pure electric cars, but then moved to hybrid drive designs because the then available batteries were in adequate. It took about 20 years of perfecting hybrid vehicles before battery technology evolved enough to allow pure electric cars. I suspect the same path will be true for battery powered aircraft. He also raises another good point, that using a hybrid design allows engineers to develop the electrical distribution and control systems that will eventually be used on full electric aircraft. In other words, learn how to get most of the needed technology done while waiting for batteries to catch up.