To see how new rocket and aircraft designs perform under pressure, NASA’s aeronautical innovators are painting model prototypes an eye-searing hot pink for wind tunnel tests in California and Virginia.
The wild paint job isn’t just for looks. NASA engineers are using a pressure-sensitive paint (PSP) that can show — with a dazzling glow — how the surface of a rocket or aircraft model responds to pressure. NASA is conducting the tests in wind tunnels at the agency’s Ames Research Center in California and Langley Research Center in Virginia.
Here’s how it works: Once inside the wind tunnel, the model aircraft is illuminated with blue LED lights to give the fluorescent paint a bright-pink glow. Then, high-speed winds flow across the model, creating a range of surface pressures across different parts of the aircraft. [NASA’s Vision of Future Air Travel in Pictures]
Oxygen in the wind reacts with luminophores, or fluorescent particles, in the paint, quenching its glow under high pressure. The varying shades of dull and bright pink that result allow researchers to visualize exactly how the pressure is distributed.

“PSP is great because, as
Article source: http://www.space.com/33715-nasa-paints-rockets-aircraft-pink-photos.html
