In this paper we present experimental results related to the implementation on an Airbus A321 of a power supply for wireless sensors deployed for aerodynamic flight tests. This autonomous battery-free power supply is capturing, managing and storing primary energy from the environment, using solar light and photovoltaic cells. The specifications are detailed, the general architecture is presented and justified together with the identification of devices, and flight test results are given. Introduction Air transport is now an essential pillar of modern society, and a major driver of global economic prosperity. Aviation forecasts show massive traffic increase, both for passengers and cargo, in the next decades. Therefore, air transport is facing various challenges such as fossil fuel consumption, pollutant and noise emission, air traffic congestion, business model, safety and security.