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.

Thermal barrier coatings Thermal efficiency Thermal spraying Thrust class Thrust-to-weight ratio Total stage efficiency Transonic airfoils Turbine Turbine engine Turbofan engine Turbojet engine Turboprop engine Turboshaft engine

Thrust class

Turbojet engines are grouped into three thrust classes: engines with a thrust of up to 20,000 lbs, engines with a thrust between 20,000 lbs and approx. 50,000 lbs and engines with a thrust in excess of 50,000 lbs.