TED-Ed: How do jetpacks work? And why don't we all have them? | Richard Browning

The video explores the evolution of flight technology, comparing the ease of launching a massive spacecraft to the challenges of creating a functional jetpack. It delves into the physics of flight, explaining how jet engines work and why larger engines are more efficient. The video highlights the difficulties engineers faced in designing jetpacks, such as limited fuel capacity and control issues. However, advancements in materials and computing have led to the development of micro engines and the innovative jet suit by Richard Browning. Despite these advancements, personal jetpacks remain a distant possibility without further improvements in fuel efficiency and engine technology.

What is the primary reason a massive spacecraft is easier to launch than a single pilot with a rocket pack?

• Spacecrafts are lighter than rocket packs.

• Spacecrafts experience less gravitational force.

• Spacecrafts have more upward force to counteract gravity.

• Spacecrafts have more powerful engines.

How do modern jet engines generate thrust?

• By expelling compressed air rapidly.

• By using solar power to heat air.

• By rotating large propellers.

• By using magnetic fields to push air.

Why were early jetpack designs limited in flight duration?

• They could not carry enough fuel.

• They were too heavy to lift off.

• They lacked proper navigation systems.

• They were not aerodynamic.

What technological advancements have improved the power-to-weight ratio of jet engines?

• Advances in solar panel technology.

• Development of lighter materials and precise fuel management systems.

• Invention of new types of propellers.

• Use of nuclear energy for propulsion.

How do pilots control the jet suit effectively?

• By following a pre-programmed flight path.

• By using a joystick for navigation.

• By using their brain to calibrate balance and orientation.

• By relying on an autopilot system.