In former hot air engines it was impossible to prevent the valves from leaking ; this difficulty seems to be overcome in this one, as it has been running for several monthi without requiring any ...

The Federal Aviation Administration (FAA) has issued a new airworthiness directive (AD) for some Boeing 757 aircraft powered by Rolls-Royce engines. The AD was proposed because of instances of ...

Internal combustion engines are incredibly complicated ... for a diesel engine to fire since the air inside the cylinder needs to be very hot to ignite the diesel fuel. Modern diesel engines ...