That is pretty cool... there is no reason why it shouldn't work... battery technology is improving all the time. Once endurance becomes long enough to be useable, it will be awesome ....
I was expecting it to do this....
https://www.youtube.com/watch?v=PptMrBFAO-A
Dennis,
I notice, according to their telemetry, that R-44 is consuming 177n-m of torque in a hover. That`s about 131 ftlb. Do you remember the Mini-500 torque required at max gross of 825 lbs. Seems like I remember it being about 63 ftlb. Is that what you remember?
Speaking of impressive, check this guy out... a 700 T-Rex has about a 70cm rotor disk....