How long can the FlyCart 30 fly with a payload?

Name: heliguy
Address: Unit 9, Jupiter Court Orion Business Park North Shields Tyne & Wear NE29 7SE, GB
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With a 40kg payload and one battery, the FlyCart 30's flight time is around 9 minutes (8km), and with a 30kg payload and dual batteries, flight time extends to 18 minutes (16km).