What is this tube in a jet engine's air intake?

Question

I have long been wondering what is the official name of this little air intake tube located in front of the fan blades and its intended functions. I did search it on google but it was in vain. I guess that it may be a pitot tube installed inside a jet engine for gauging the airspeed of the engine intake air.

It is not a pitot tube because it is open on both ends, and pitot tubes are only open on one end(with the exception of a water drain hole which is several times smaller than the main opening). It is more of a specialized static-pressure port. — Max Power, Mar 09 '19 at 22:28

score 15 · Accepted Answer · edited Mar 10 '19 at 08:13

15

That's the EPR inlet pressure sensor (there's another one located aft of the engine in the exhaust).

EPR = Engine Pressure Ratio, one way to measure thrust.

(source)

See also:

edited Mar 10 '19 at 08:13

answered Mar 09 '19 at 17:37

Karl Stephen

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score 1 · Answer 2 · answered Apr 10 '19 at 14:36

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One will be the P2 (pressure) sensor, the other will be T2 (temperature)

answered Apr 10 '19 at 14:36

Swampy

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This could be improved by explaining the purpose of these sensors. – fooot Apr 10 '19 at 15:29

What is this tube in a jet engine's air intake?

2 Answers2