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Old 26th Mar 2014, 19:26
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Wizofoz
 
Join Date: Jun 2001
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Not so much that, as there is no POINT to making counter-rotating jet engines.

It is a fact that there have in fact been a few attempts at making counter-rotating propellor engines, but that is because P factor means that a prop aircraft with both engines rotating in the same direction has a reduced performance in the single engine case on one engine in comparison to the other.

Still, the economic factors involved in having two different engines means even this has been a minority proposition.

This is NOT the case with jet engines.

While there is a small amount of "swirl" in the eflux of jet engines, it does not make any significant change to the aircrafts single engine performance, no matter which engine fails.

Jets don't have a "critical" engine, so there is no point in having counter-rotating engines.
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