The Evolution of High Altitude Solar Flight

The video discusses the evolution of experimental planes like the Helios prototype, designed for high altitude research. Helios, a solar-powered aircraft with a 75-meter wingspan, aimed to stay airborne for months. In 2001, it attempted a record altitude flight in Hawaii, monitored by a large ground team. The plane, controlled by elevators without flaps or rudder, faced challenges like wind vulnerability. Despite reaching over 29,000 meters, Helios crashed on a later flight.

What is one of the main advantages of high-altitude research platforms?

• They can be used for earth observation.

• They are faster than traditional aircraft.

• They require no maintenance.

• They are cheaper than satellites.

What powers the Helios prototype?

• Wind turbines

• Solar cells

• Nuclear energy

• Fossil fuels

How does the Helios prototype change direction?

• By using a rudder

• By changing the altitude

• By varying the angles of control surfaces

• By adjusting the flaps

What was the record-breaking altitude achieved by Helios?

• 35,000 meters

• 20,000 meters

• 25,000 meters

• 29,000 meters

What was a significant challenge faced by the Helios during its flights?

• Engine failure

• Strong winds at low altitudes

• Bird strikes

• Heavy rain