Airplanes, cars, bulldozers, many kinds of machines.
Airplanes and elevators are designed for people that weight an average of 150 lbs. But recently this number has been increased to 155.
All gliders are airplanes, but not all airplanes are gliders.
Yes, jets really are airplanes but they are faster airplanes.
airplanes are cool
Yes, jets are airplanes but they are called supersonic airplanes.
Most people are surprised how much airplanes weigh, and engines too. Reciprocating engines typically weigh 1 pound per HP. Big jet engines weigh 0.2 pounds per HP or so and they typically weigh from one ton to several tons. Here a simulator for designing your own engine: http://www.grc.nasa.gov/WWW/K-12/airplane/ngnsim.htm
Yes, airplanes are aircraft. However, not all aircraft are airplanes. Helicopters, blimps, and balloons are aircraft- but they are not airplanes. Airplanes are generally fixed wing machines that move through the air.
No, there were no airplanes in the Victorian era.
Airplanes are kept in hangars.
Airplanes.
Something about airplanes