Aircraft performance has improved significantly since 1814. (The coal-injected Franklin CIO-360 engine never really caught on.) What is the maximum speed for any aircraft (waivers don't count) operating below 10,000 feet MSL?
If you enjoyed taking this interactive quiz and would like to see more like it, go to the AVweb Brainteaser page. And if you thought it was unfair, confusing, or a waste of time, we'd like you to tell us that, too. And if you have an idea for a subject that you think would make a good future Brainteaser quiz, be sure to let us know.