Cycloidial propulsion (cyclorotor, cycloidal rotor, cycloidal propeller or cyclogiro) is the perfed fit for vertical airship frames. The low-speed and instant vector change features of cycloidial propellers offer everything an airship pilot would need to accurately pilot an airship under extreme conditions.
Airship.org envisions lighweight derivitives of a Voith Schneider Propeller modified for use vertical airship and airship crane systems.
An early patent for a cycloidial powered aircraft
Close-up of a vertical airship with cycloidial propulsion
Airship.org design for cycloidial powered vertical airship over Easter Island.
Airship.org design for cycloidial powered vertical airship in Seattle.