LONDON—Hill Helicopters is on track to fire up its internally developed GT50 turboshaft engine for its HX/HC50 family of single-engine light helicopters this summer, company founder Jason Hill has ...

There's no argument that helicopters are not the same as jets. From their vertical lift to their hovering abilities, helicopters serve a purpose uniquely their own. But that doesn't mean they aren't ...

Lag is the bane of every turbocharged engine, and the ways people have tried to eliminate it boggle the mind. From twincharging to cold-air antilag, an MGU-H, or even just one turbo per cylinder, it ...