Which of the following was NOT a Golden Age of Aviation innovation?
Wooden aircraft to metal
Air travel became more affordable
Nitrogen gas as fuel
Cabin air pressurization
Answer: The correct answer is Nitrogen gas as fuel
Which of the following was NOT a Golden Age of Aviation innovation?
Wooden aircraft to metal
Air travel became more affordable
Nitrogen gas as fuel
Cabin air pressurization
Answer: The correct answer is Nitrogen gas as fuel