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Blades The turbine is the probably the most critical part of the engine, and has always imposed the main limitation upon engine power and development. This is because, while to operate in gas temperatures only slightly less severe than those experienced by the stator blades, the whole turbine rotates so fast that centrifugal force exerts a force of many tons on each blade, tending to pull it out of the disc in which it is mounted. The acceleration on each blade may amount to several thousand ( g's), so that a blade with a mass of a few ounces may experience an end load of two or three tons and a consequent stress of 30,000 pounds per square inch or more. On the top of this, the blade must withstand the very large sideways, or tangential, gas load which makes the assembly rotate, as well as high-frequency vibrations which tend to...

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