The two proposed adaptive engines that might one day power the Next Generation Air Dominance fighter have passed an important design review, and Pratt & Whitney and GE Aerospace are each proceeding to ...

Rolls-Royce said the new engines planned for the B-52 Stratofortress will go into more intensive altitude testing in early 2025, now that it has passed its critical design review. (Staff Sgt. Lauren ...

Rotary engines (also known as Wankel engines and Wankel rotary engines) are quite different from piston or "reciprocating" engines. One of the distinguishing features is that they don't need valves to ...

While most engines have the same number of spark plugs and cylinders, some four-cylinder blocks have two plugs for each ...

A teardown of Honda’s R18 engine suggests that added complexity in modern powertrains may come at the expense of long-term ...

H4 engines are horizontally opposed four-cylinder engines also commonly known by names like flat-four and boxer. For comparison, most four-cylinder automobile engines are upright inline designs. The ...

Intake, compression, power, then exhaust. Every 4-stroke engine ever made – about 80% of all engines currently in existence – function on this principle – even rotary engines. But now, Porsche has ...

The core difference in business strategy is that Pratt & Whitney targeted the high-volume, fast-growing narrowbody market ...

Astron aerospace has shown a partial prototype of a new rotary combustion engine it claims runs at an extraordinary 60% thermal efficiency, burning totally clean with zero NOx emissions and nothing ...

Combustion engines with an odd number of cylinders are not unheard of but are not particularly common, either. Honda‘s just trotted out an interesting one: A V3, so, two pistons on one side and one on ...