German air taxi manufacturer Volocopter has been given the green light to start series production of its aircraft, the company announced on Thursday evening at its headquarters in Bruchsal near the south-western city of Karlsruhe. Volocopter manufactures all-electric aircraft with a distinctive ring structure supporting multiple rotors above a passenger capsule. The craft can take off and land vertically. The company has received an extension to its Production Organisation Approval (POA) from the German Federal Aviation Office, or LBA, which will enable series production of the Volocity flying…