How do we know?
↻ One of the pages with a moving picture
The Wright brothers tested their ideas in their own air tunnel.
- Four forces act on a flying plane: lift pulls up, weight pulls down, thrust pushes forward and drag holds it back.
- The engines make thrust. Their job is to beat the drag, not to lift the plane.
- As the wing moves, it turns the air downward. The air pushes back, so the wing gets pushed up.
- The air over the curved top speeds up, and the pressure there drops. Higher pressure below helps push up too.
The Wright brothers made over a thousand glides first. They tested ideas in their own air tunnel, then designed their own engine and propellers.
On 17 December 1903, Orville Wright made the first powered airplane flight at Kitty Hawk, North Carolina. It lasted 12 seconds. The longest of the brothers’ four flights that first day went 852 feet and lasted 59 seconds.
Scientists agree on the math of lift, but they still argue about the simplest way to explain it.
Wow number
852 feet The longest of the Wright brothers’ four flights on their first day of flying. It lasted 59 seconds.
Myth or fact?
Air over the top of a wing must meet the air from below at the back. Myth. No rule says so. The top air moves even faster than that idea says.
Wings can’t make lift in space. Fact. No air, no lift! NASA says space is almost empty of air.
Think about it
Scientists agree on the math of lift, but still argue about the simplest way to explain it. How would you explain it to a friend?
Where in the world?
Kitty Hawk, North Carolina, USA where, on 17 December 1903, Orville Wright made the first powered airplane flight. It lasted 12 seconds — 36.0147° N, 75.6678° W.
Where these facts come from
Every number on page 91, and who measured it
This page tells us about the 1903 Wright Flyer and its first 12-second flight at Kitty Hawk.
1903 Wright Flyer — The Smithsonian's National Air and Space Museum
airandspace.si.edu/collection-objects/1903-wright-flyer/nasm_A19610048000
We checked it on 31 October 2026
This page tells us how the Wright brothers practiced with gliders and flew 852 feet.
1903-The First Flight — The U.S. National Park Service
nps.gov/wrbr/learn/historyculture/thefirstflight.htm
We checked it on 31 October 2026
This page tells us why scientists still argue about how wings make lift.
No One Can Explain Why Planes Stay in the Air — Scientific American, a science magazine
scientificamerican.com/article/no-one-can-explain-why-planes-stay-in-the-air
We checked it on 31 October 2026
This page tells us about the four forces on an airplane.
Four Forces on an Airplane — NASA, the U.S. space agency
www1.grc.nasa.gov/beginners-guide-to-aeronautics/four-forces-on-an-airplane
We checked it on 31 October 2026
This page tells us that wings make lift by turning moving air, and that there is no lift in space.
What is Lift? — NASA, the U.S. space agency
www1.grc.nasa.gov/beginners-guide-to-aeronautics/what-is-lift
We checked it on 31 October 2026
Has this changed?
Yes, this one may change. Scientists agree on the math of lift, but they still argue about the simplest way to explain it.
How airplanes stay up, in practice, is not going to change.
Words from this page
- lift
- The upward push on a wing.
- thrust
- The forward push made by an engine.
- drag
- The force of air that holds a plane back.
Try it!
Try two ways to make a paper rise.
1. Hold a strip of paper under your bottom lip so it curves down. 2. Blow straight out over the top. Watch the paper. 3. Now curve it up and blow along the bottom. Watch again.
What happens: it rises both times! Scientists say fast air alone can’t explain it. The curved paper turns the moving air.
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