Maybe Paul is the answer to the problems facing the largestplane manufacturer in the world Boeing......they "The drone having a two side long shaft of motor or alternator can be provided with one for top motor wings, and the bottom side is newly attached with an alternator or generator rotating together at same RPM as the motor wings, and the produced power can be recharged to the batteries or used for the motor power directly." can use their patented device on the Max 737 and PO could have it air worthy by 2020.