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Old 14th Oct 2005, 12:27
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Mark 1
 
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As has been said above, direct comparisons are not simple.

An RB211 for instance, may be quoted with a static thrust of 50,000 lbs; this is the force going through the pylon, but it isn't doing any work.

In flight, the thrust reduces maybe down to 20-30,000lbs, but it is now working and generating power.

A similar engine used in a generating plant or a marine engine would produce around 30,000 SHP. This is similar to the amount of power absorbed by the fan to produce take-off thrust.

These numbers are all from vague memory, but it might give you a rough idea
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