Glossary

What are transonic airfoils, and what is the active clearance control? Check out our technical dictionary and find out more about engine technology terms – from active clearance control to velocity triangle.

HAE "Hell" "Hard" anodizing Hard chrome-plating Hardening and tempering Hardfacing Heat exchanger High-pressure compressor High-pressure turbine High-speed milling High-temperature vacuum brazing Hot isostatic pressing (HIP) Hypersonic aircraft

HAE "Hell"

The name of this anodic process has been derived from the name of its inventor Harry A. Evangelides. The process is used to deposit hard and wear-resistant oxide coatings on magnesium materials to protect them against corrosion. An additional paint coat guarantees optimum corrosion protection.