high-efficiency engine

high aerodynamic efficiency

engine capacity / engine power, engine output

high altitude-high opening (HAHO)

high pay-off target / high-payoff target (HPT)

high-burst / high burst (HB)

high road; high-road

high-power illuminator radar / high power illuminating radar (HIPIR)

high-performance / high performance

high engine speed

high-thrust-to-weight engine

reaction engine / motor (jet engine)

rotary engine (Wankel engine)

engine ground run / engine test

engine oil reservoir / engine oil tank

fighting capacity/efficiency

loss of efficiency

operational efficiency

restoring fighting efficiency

artillery fire efficiency

fighting efficiency

fire effectiveness (efficiency)

air efficiency

all-around efficiency

approach efficiency

ballistic efficiency

brake horsepower efficiency

increase of efficiency

indicated thermal efficiency

useful efficiency

intrinsic efficiency

air burst advanced hit efficiency and destruction (AHEAD)

adiabatic efficiency