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Building Leonardo da Vinci's Aerial Screw — The Ancestor of the Helicopter

作成者

Emma

2. 7月 2026

Building Leonardo da Vinci's Aerial Screw — The Ancestor of the Helicopter

Around 1489 Leonardo da Vinci sketched a machine to rise straight up into the air: a huge screw of starched linen that, spun fast enough, would 'make its spiral in the air and rise'. It is the earliest known design for vertical flight — the direct ancestor of the helicopter rotor. This blueprint reconstructs Leonardo's aerial screw from a cane-and-linen helix on a spun axle, and is honest about the outcome: at human power it could never lift its own weight, yet its principle — a turning helical wing driving air downward — is exactly how every helicopter flies today, 450 years later.

上級者

手順

Understand Leonardo's idea

Just as a wood screw bites into a plank as it turns, Leonardo reasoned a large screw turning fast would bite into the air and climb. He wrote that a well-made screw of starched linen, spun quickly, 'will make its spiral in the air and it will rise high'. This is the first design for vertical flight.

Raise the central axle

Fix a stout vertical pole as the central axle, standing on a round platform that can turn freely. Everything spins about this axle, so it must be straight, strong and well seated.

このステップの材料:

Beech Lumber2 個

必要な工具:

Hand Saw

Form the helical frame

Bend lengths of springy cane into a continuous spiral rising around the axle — the thread of the screw — and lash them to radial arms fixed to the pole. The spiral should make about one full turn from platform to top.

このステップの材料:

Split Cane3 束

Binding Rope20 メートル

必要な工具:

Knife

Cover with stiffened linen

Stretch linen tightly over the spiral frame and stiffen it with starch or boiled linseed oil, as Leonardo specified, so the screw presents one continuous solid face to the air rather than a leaky mesh.

このステップの材料:

Linen Fabric30 square meter

Boiled Linseed Oil1 リットル

必要な工具:

Awl

Rig the drive

Attach cords or push-bars at the base so several people can run around the platform and spin the screw as fast as they can — the muscle power Leonardo intended to turn it.

このステップの材料:

Binding Rope15 メートル

必要な工具:

Knife

Spin it and feel the downwash

Spin the screw up to speed and feel the column of air it drives downward beneath it. That downwash is genuine thrust — the machine really does push against the air, exactly as a helicopter rotor does.

The honest verdict

At full size and human power it cannot lift its own weight: the linen-and-cane structure is heavy and muscle power is far too weak, and Leonardo had no light engine. It never flew. But the concept — a rotating helical wing throwing air down to climb — is precisely the principle of the helicopter, sketched 450 years early.

Prove the principle at model scale

Build a small, light version and spin it with a wound cord or a little motor: it lifts off. This shows Leonardo's reasoning was sound — only the power-to-weight ratio available in 1489 stood between his drawing and true flight.