Drones today are inadequate. While the basics of simple unmanned flying machines are simple enough, if drones are going to revolutionize how people do anything, they'll need to do much more, within the basic confines of their design. So Local Motors, a Phoenix-based open-source manufacturing company, is partnering with Airbus to design a cargo drone for the future.

They're holding a contest, with submissions open until May 22nd. Voting on the entrees will begin on June 5th. Here are some of the requirements for the design:

Vertical takeoff and landing

At least one fixed wing, for flying like a plane

Must use between 4 and 10 rotors/propellers for lift and thrust

Weigh no more than 55 pounds when fully loaded

Maximum wingspan of 16 feet

Maximum length of 13 feet

No single part can be longer than 6 feet 6 inches, so that the parts can be broken up for transport

Must be able to carry an 11-pound cargo over 37 miles and a 6.5-pound cargo over 62 miles

Must have a payload bay with exact dimensions that can be reached from the bottom of the aircraft

Cruising speed must be at least 50 mph

Maximum speed can't be greater than 120 mph

Has to be powered by rechargeable batteries

Must be able to fly in sustained winds of 22 mph.

That's a lot of requirements, and there are more details at the contest page.