Engine pressure ratio (EPR), the ratio of inlet pressure over exhaust-let pressure measurements. The ratio is used as the primary parameter to set thrust on some engines.
发动机压力比(epr)，进气压力与排气压力值的比，某些发动机以此作为设定推力的主要依据。
2
By comparison, the chemical power generated by a rocket equals one half the thrust times the exhaust velocity.
相比之下，火箭的化学能功率是推进力的一半乘以排气速度。
3
The thrust reverser (T/R) system controls the direction of the fan air exhaust to make forward or reverse thrust.