Inventions: Airplane • English Conversation Questions

What inspired the first airplane inventors?
How has the design of airplanes evolved over time?
What have been some major milestones in the development of airplanes?
What are some common materials used to construct airplanes?
What are some safety features that have been implemented in airplanes?
What are some of the most significant inventions or innovations in the history of aviation?
How have airplanes impacted society and the economy?
What are some current challenges facing the aviation industry?
What new technologies are being developed for use in airplanes?
What are some examples of unconventional or experimental aircraft?
What do you think the future of air travel looks like?