Are Passenger Jet Engines Hitting Their Technical Limits?

The high-pressure turbine blades in a Trent 1000 passenger jet engine have to withstand temperatures far above the melting point of the nickel alloy from which they’re made. It’s a fiendish technical challenge for the engine’s British manufacturer, Rolls-Royce Holdings Plc — comparable to trying to stop an ice cube melting inside a kitchen oven on full blast. The solution found by the company’s engineers was to blow cool air through tiny holes in the blades. Unfortunately this clever approach… (finance.yahoo.com) المزيد...