Has Anyone Designed a Four-Spool Engine?

[avinod4all]

Actually, we have three spool, two spool engine and single spool engines, how about the four spool engine? did anyone came across the design of four spool engine? I think adding an extra spool leads to increase in engine weight and becomes more complex in its mechanism.

 

[physixlover]

'No' I have never come across a 4 spool engine, and yes it would be more complicated and causes lots of maintenance problems for a four spool engine, I would better suggest to discuss about a three spool or two spool engine in this thread.
Major advantage of triple spool design is it's ability to minimize engine surges thus they are the most efficient engine flying.

 

[NatSusan]

I have not personally come across a four spool engine design, but I have heard of them being used in certain aircraft engines. From what I understand, the purpose of a four spool engine is to provide more power and efficiency by dividing the workload among four separate spools instead of just three. However, as you mentioned, this does add weight and complexity to the engine, so it may not be a practical option for all aircraft. I would be interested to hear from anyone who has experience with four spool engines and can provide more insight on their performance and reliability.