Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Little Stick (or Probe?) In Engine Intake?  
User currently offlineJawed From United States of America, joined Sep 2006, 482 posts, RR: 0
Posted (6 years 8 months 6 days 12 hours ago) and read 5545 times:

What is this component that sticks into the engine intake? It looks like something that may measure pressure in front of the engine blades. Is that what it is?

It's clearly visible on the inside wall of the engine here:

http://www.airliners.net/open.file/1065799/L/
http://www.airliners.net/open.file/1280417/L/

Do other engines, like the GE90 also have this?

[Edited 2007-11-29 15:39:55]

6 replies: All unread, jump to last
 
User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 1, posted (6 years 8 months 6 days 12 hours ago) and read 5530 times:

Quoting Jawed (Thread starter):
Do other engines, like the GE90 also have this?

Most all engines have that. It's the ITT probe. It measures the air temp at the inlet

GE90
View Large View Medium
Click here for bigger photo!

Photo © Fabrice Sanchez - Brussels Aviation Photography



[Edited 2007-11-29 15:56:00]


"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineAvt007 From Canada, joined Jul 2000, 2132 posts, RR: 5
Reply 2, posted (6 years 8 months 6 days 10 hours ago) and read 5464 times:

EMBQA is very close, but since this is Anet, I'll nitpick. It is a temperature probe, known as T2 on some GEs. It does indeed measure inlet temp.
ITT stands for interturbine temperature, referring to the temperature between the high pressure and low pressure turbines.

[Edited 2007-11-29 18:32:34]

User currently offlineFLY2HMO From , joined Dec 1969, posts, RR:
Reply 3, posted (6 years 8 months 6 days 9 hours ago) and read 5457 times:



Quoting Avt007 (Reply 2):
ITT stands for interturbine temperature.

Probes which AFAIK, are not visible from the exterior, at least not with the cowls closed.

Quoting Avt007 (Reply 2):
It is a temperature probe, known as T2 on some GEs. It does indeed measure inlet temp.

IIRC in most engines they sense pressure too, which is then used for to calculate EPR (Engine Pressure Ratio) by comparing pressures with a sensor in the exhaust side of the engine.

Been a while since my turbines class so someone correct me if I'm wrong.


User currently offlineAvt007 From Canada, joined Jul 2000, 2132 posts, RR: 5
Reply 4, posted (6 years 8 months 6 days 9 hours ago) and read 5453 times:

ITT probes are buried in the engine, directly in the hot gas path. You can see the harnesses from outside if the cowls are removed. On the CF34, the T2 probe is only for temperature, it uses a pressure sensor on the FADEC module for pressure. Or alternately, some aircraft may use air data computer static pressure values. I wouldn't be surprised if you're right, and some manufacturers use dual temp/pressure probes.

User currently offlineEx52tech From United States of America, joined Dec 2006, 559 posts, RR: 1
Reply 5, posted (6 years 8 months 3 days 15 hours ago) and read 5281 times:



Quoting FLY2HMO (Reply 3):
IIRC in most engines they sense pressure too, which is then used for to calculate EPR (Engine Pressure Ratio) by comparing pressures with a sensor in the exhaust side of the engine.


Many of the newer aircraft take the Pt2 reading off the nose of the aircraft, or some location other than the inlet of the engine. Less plumbing in the nose cowl, and less plumbing in the pylons. The EPR transducer can be located someplace other than the pylon also.



"Saddest thing I ever witnessed....an airplane being scrapped"
User currently offlineG4doc2004 From United States of America, joined Feb 2004, 123 posts, RR: 0
Reply 6, posted (6 years 8 months 2 days 19 hours ago) and read 5245 times:

Some engines also use a TGT probe, such as the older CJ610 engine, as well as APU's. This probe is visible if you look up the tailpipe, as it is aft of the last stage turbine wheel.


"Failure to prepare is preparing to fail"--Benjamin Franklin
Top Of Page
Forum Index

Reply To This Topic Little Stick (or Probe?) In Engine Intake?
Username:
No username? Sign up now!
Password: 


Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
  • DETAILED RULES
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)


Similar topics:More similar topics...
Engine Drag In Engine Failure posted Wed Jun 20 2007 11:26:08 by A320ajm
Taking Off (or Not) In Fog From BHX posted Sat Apr 14 2007 22:00:15 by EMAlad
Weights Of Honda And/or Eclipse Jet Engine posted Tue Jan 30 2007 19:39:08 by Mlglaw
Cooling Of Cabin Air In Engine posted Wed Dec 13 2006 03:34:25 by Jawed
Sparks In Engine On Reverse posted Thu Sep 14 2006 11:11:58 by RyDawg82
Who Has Authority Police Or Pilot In Bomb Scare? posted Mon May 1 2006 19:42:07 by JulianUK
Are Trijets Easier To Fly In Engine Failure posted Fri Jan 27 2006 02:44:05 by Newagebird
Change In Engine Sounds At Max Power posted Thu Jan 26 2006 06:35:53 by Dr.DTW
Damaged Engine Intake On MD-11 posted Sat Jan 29 2005 00:21:38 by Singel09
Fan Blades In #2 Engine Of 3 Engine A/c? posted Sun Aug 8 2004 00:15:10 by WakeTurbulence

Sponsor Message:
Printer friendly format