Published 21 October, 2022
The Airbus Zephyr S:
The Airbus Zephyr S is a lightweight, solar-powered, unmanned plane that first flew in 2018. 1)
Zephyr S carries 24 kg of lithium-ion batteries with a 435 Wh/kg specific energy.2) In August 2022, Zephyr S flew 56,000 km over the course of 26 days.3) This gives us 1490 m/kJ.
Zephyr S has a mass of 75 kg.4)
This gives us 111.7 kg*m/J.