The "balloon" around the rotors is for storage only. You can open the upper part and put up to X batteries in it.

All comments are welcome.

Hello everyone. I need your opinion about my drone concept.

http://i.imgur.com/GdefjJB.jpg
http://i.imgur.com/dNkGG8B.jpg
http://i.imgur.com/0oPbZqM.jpg

This is a hybrid of airship, quadrocopter and airplane:

the cylinders ("body" and "wings") are filled with hydrogen; on top of them are solar panels

the box in the middle stores batteries and electric motors for the vertical propellers

the horizontal propellers are powered by electric motors located in the cones at the end of "body" cylinders; the motors move inside these cones to change the direction of flight and for turning the drone around

Your comments are highly appreciated.