Why are turbine engines more reliable than piston engines?

Also, there's nothing intrinsic about the piston engine which makes it less reliable, but you have to compare like with like. For the same power / weight ratio a piston engine is likely to be much more highly stressed since its thermal cycle is less efficient and not continuous. read more

The simple answer is that they have fewer moving parts. But as in all areas of locomotion, there are heavy trade offs. In small to medium size airplanes where all three types are used, the efficiency varies wildly in favor of the diesel, followed very closely by the gasoline engine. read more

Gas turbines is more reliable. In aviation, engine reliability is what dictates the fate of the planes occupants. Gas turbines also has higher power to weight ratio. This is favorable in aircraft application. Compared to piston engines, gas turbines have fewer moving parts which translates to fewer wear and tear. read more

Turbine engines are remarkably compact and lightweight compared to piston mills. The Meridian's 500 shp PT6A is comparatively small and weighs a little over 300 pounds, whereas the big-bore, turbocharged, 350 hp Lycoming on the Mirage weighs more like 450 pounds. read more