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Solar Impulse Guided Around World By Mathematics (Video)

Originally published on 1Sun4All.

Altran, a global high‐tech engineering consulting firm, works alongside its clients in the creation and development of their new products and services. Bertrand Piccard says on the video shown below: “As soon as Solar Impulse was in my mind, Altran was there. And even before we signed any contract, we had four engineers from Altran working to set up the project management, together with André Borschberg and I.”

In recent news from Altran, the France-based company says: One of the key challenges of the round-the-world flight that Solar Impulse and Altran are being faced with is managing long-haul, non-stop flights of up to 120 hours and transoceanic crossings of between 7,000 and 10,000 kilometres (4,400 to 6,200 miles). Over those long stretches, Solar Impulse 2 (Si2) will have to adapt to tricky weather conditions. Because of their inherent instability, those conditions can lead to potentially hazardous situations for the aircraft.

It is on the ground, at the Mission Control Centre (MCC) in Monaco — nerve center of the Round-The-World — through a special system of mathematical calculations developed by the Altran team, that the plane’s flight paths for this extraordinary odyssey are traced.

Between 100–150 billion flight-path possibilities were analysed in 2014: this is how mathematics is serving one of the most incredible adventures of our time.

Solar Impulse

The mission of the Altran Flight Strategy Team at the MCC base is to explore the flight possibilities and develop optimised strategies so that the Flight Director receives a constant flow of information for the decision-making process. Altran innovative calculation system was designed to simulate optimum take-off opportunities and ensure smooth flight connections, as well as to access the margins of security and level of risk. The solutions are detailed from every angle and discussed with the three other MCC specialist teams: Meteorologists, Air Traffic Controllers, and Flight Engineers.

“Altran has developed calculation systems that are innovative in their ability to both analyse massive amounts of weather data and anticipate flight parameters precisely at all times. This enables the Flight Strategy Team to study and develop the best strategy for any given flight, and to live the flight before the aircraft even gets off the ground,” explains Philippe Salle, Chairman and Chief Executive of Altran.

solar impulse

As Altran Head of Strategy and Forecast for Solar Impulse, Christophe Béesau and his team also provide maps and charts that are incorporated into the pilot’s operational flight plans. In addition, the Altran Team ensures the constant input of information to MCC control screens, presenting current and projected flight conditions. This enables the MCC to monitor flights at all times and anticipate any potential difficulties.

FYI: At Altran’s Facebook page you can pilot Solar Impulse 2 with the guidance of Ray, Solar Impulse Flight Director, and the advice of Stéphane, Expert for Simulation Team Altran. Have fun!

Video Credit: Altran | Photo Credit: Across America 2013 Mission Control Center, S. Yong and C. Beesau, Altran Modeling and Simulation Experts © Solar Impulse, Ackermann, via Solar Impulse | MCC Diagram via Solar Impulse


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Written By

-- I am an artist, painter, writer, interior designer, graphic designer, and constant student of many studies. Living with respect for the environment close at hand, the food chain, natural remedies for healing the earth, people and animals is a life-long expression and commitment. As half of a home-building team, I helped design and build harmonious, sustainable and net-zero homes that incorporate clean air systems, passive and active solar energy as well as rainwater collection systems. Private aviation stirs a special appeal, I would love to fly in the solar airplane and install a wind turbine in my yard. I am a peace-loving, courageous soul, and I am passionate about contributing to the clean energy revolution. I formerly designed and managed a clean energy website,


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