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Why Twin Spool Engine?

Sarah Jenkins • • 7 min read
Why Twin Spool Engine?

A Two-Spool Engine
The reason for doing this is that the low-pressure stages are larger in diameter, so they have higher tip speed for a given rotational speed. At the same time, the temperature is lower, and so too is the speed of sound. So, to keep the flow subsonic, they are designed to rotate at a slower speed.

What is the difference between a single spool and two spool engine?

In a single-spool engine, the high-pressure turbine drives the entire compressor. In a dual-spool engine, the compressor and high-pressure turbine are both split into two segments. Each compressor segment is driven by its corresponding turbine using two separate drive shafts, with one inside the other.

What is a twin spool engine?

A twin spool design normally has the front compressors attached to the rear turbines using an inner shaft, with a higher pressure compressor and a higher pressure turbine connected with an outer shaft.

Sarah Jenkins
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Sarah Jenkins

Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.