Solar Impulse completes 72 hour simulated flight

February 24th, 2012 by Andre Lehmann in Technology / Energy & Green Tech
The experimental Solar Impulse aircraft with Swiss pilot Andre Borschberg onboard flies at sunrise above Payerne airbase, July 2010, during the first attempt to fly around the clock fuelled by the energy of the sun. Borschberg completed a 72-hour non-stop flight Friday -- but in a simulator for the new Solar Impulse aircraft planned for a 2014 world tour using only solar energy.


The experimental Solar Impulse aircraft with Swiss pilot Andre Borschberg onboard flies at sunrise above Payerne airbase, July 2010, during the first attempt to fly around the clock fuelled by the energy of the sun. Borschberg completed a 72-hour non-stop flight Friday -- but in a simulator for the new Solar Impulse aircraft planned for a 2014 world tour using only solar energy.

Swiss pilot Andre Borschberg completed a 72-hour non-stop flight Friday -- but in a simulator for the new Solar Impulse aircraft planned for a 2014 world tour using only solar energy.

Borschberg emerged red-eyed from to tell reporters how he had endured three days and three nights in a narrow , wired up to and filmed from all angles.

For he and his 80-strong support team have to ensure not just that they can build a solar-powered aircraft capable of completing the flight around the world, but also that they have a pilot strong enough to complete the mission.

Borschberg declared the experiment a success.

"This simulation was extremely important because it has shown the strategy for the 2014 flight is viable," he told reporters.

Borschberg founded the project with Bertrand Piccard, a famous explorer who made his name for travelling around the world in a hot-air balloon.

"This is the first time each section of the team worked simultaneously in one place, for a long time," said Piccard.

The projected tour of the world would be split up into five stages, said Borschberg.

"The longest flight segments will last up to five days and five nights and we had to make sure the pilot aboard the aircraft can survive" during these long periods, he added.

To this end, the team completely redesigned the cockpit from the previous model that last summer made a series of European flights to air shows in Brussels and Paris, making it more spacious.

The pilot's seat can be folded so he can relax or sleep very briefly after connecting the autopilot. A toilet is built into the seat.

He can be fed with freeze-dried meals that can be warmed up during the flight.

"We focused on gastronomic pleasure with real dishes, not tablets," said a spokeswoman.

The team had to contend with 20 simulated approach and landings a day during the simulation, with little respite for the pilot.

To avoid cramping up, the pilot devoted himself to yoga and pilates exercises.

The had to get by on on snatches of microsleep lasting only about 20 minutes and come the real mission, he will also have to be able to withstand extreme temperature fluctuations.

The first prototype of made aviation history in July 2010 providing the first uninterrupted flight of 24 hours powered only by its solar panels and batteries.

Its wings were covered with 12,000 solar cells and it had four electric motors.

Construction has already started on the new device, which will be larger, with new batteries and engines.

The aircraft must be ready for its first test in 2013.

(c) 2012 AFP

"Solar Impulse completes 72 hour simulated flight." February 24th, 2012. http://phys.org/news/2012-02-solar-impulse-hour-simulated-flight.html