Why Are Airplane Engines So Big?

The video discusses the efficiency of jet engines, comparing the Airbus A-350 and Boeing 747. It explains the components of modern jet engines, highlighting the roles of the jet core and fan. The inefficiency of pure jet engines is addressed, emphasizing the importance of balancing engine size to optimize efficiency and reduce drag. The video concludes with predictions on the future growth of jet engines.

Why are larger engines generally more efficient than smaller ones?

• They produce more noise.

• They are easier to manufacture.

• They have a larger fan that provides more thrust.

• They consume more fuel.

What is the main reason pure jet engines are inefficient?

• They are too heavy.

• They require a lot of maintenance.

• They expel exhaust at very high speeds.

• They are not powerful enough.

How does accelerating a large amount of air a little bit help in engine efficiency?

• It makes the engine lighter.

• It reduces noise pollution.

• It increases the speed of the aircraft.

• It provides the same momentum boost with less energy.

What happens if an engine is made too small?

• It becomes more efficient.

• It reduces drag.

• It needs to accelerate air more, wasting energy.

• It produces more thrust.

What is the estimated ideal diameter for a jet engine?

• 5 meters

• 4 meters

• 2 meters

• 3 meters