KINGFISHER 路 SHAPE & FLOW
A beak meets a bullet train
What could a diving bird teach a train designer?
01 路 NOTICE THE NATURE
What鈥檚 really
happening?
A kingfisher dives from air into water to catch fish. Water resists its movement much more than air does, and its narrow, streamlined beak enters first. Engineer Eiji Nakatsu wondered whether the beak鈥檚 shape helped explain the bird鈥檚 low-splash entry.
02 路 BORROW AN IDEA
From nature
to design.
Nakatsu used that observation as a clue when his team investigated pressure waves made by fast trains entering tunnels. Tests and computer simulations helped them develop the 500-Series Shinkansen鈥檚 long nose, which reduced sudden air-pressure changes.
THE IDEA TO TAKE AWAY
A gradual change in shape can change how a moving object meets the material around it.
A useful detail
The bird supplied a useful clue; engineers still had to test a train design for conditions different from a dive into water. This example is about the 500-Series nose, not the invention of all trains.
Follow the evidence
Sources open in a new tab. Some research papers use grown-up science language.