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This has been bugging me for years. Just wondering if anyone out there knows on average, on full power, how fast (rotations per second) a 747 jet engine can rotate at?
I don't know about the large diameter fans, but the GE turbojets on the Lear are spinning about 19,000 rpm at 100%.
The little Garrett turboprops are spinning the turbine at around 30,000 rpm, while the prop turns around 1700.
The larger fans turn slower, but I would imagine they're still in the 15 to 19,000 rpm range in the turbine and compressor, and 10 to 15 with the fan depending on the engine. Many turbofans have a concentric shaft design where the fan turns slower than the rest of the engine.
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