Simviation Forum - What comes out of the...ass?

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What comes out of the...ass? (Read 441 times)

Nov 11^th, 2003 at 5:33am

Mr. Bones Offline
Colonel

Posts: 4304

hello guys,

i've been thinking about this for a long time...but now i want an answer: what comes out of the ass of a plane?

it looks like smoke, but is there an engine situated there? i guess not...

to make myself clear, i added a photo bellow...and i'd like to know what's the use of the part in the blue circle? thanx Wink

Raw power...the J-58.&&&&&&My Anet collection.&&

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Reply #1 - Nov 11^th, 2003 at 9:12am

OTTOL Offline
Colonel
Fintas, Kuwait (OKBK)

Gender:
Posts: 918

I like the graphic title! It's like one of those "FREE SEX and BEER" ads, you just can't pass it up!

That's the exhaust for the APU ( auxiliary power unit). It's a small(usually single stage, centrifugal flow), turbine. It has accessory drives for a hydraulic pump, and generator(for DC power). It doesn't provide any thrust, although the idea has come up before(I Think on the B777). This allows the aircraft to "power up" systems, without running the main engines, or hooking up a GPU(ground power unit). The unit remains on until after takeoff(usually shut down after ascending through 18,000') as a backup for any potential system failures. It's usually turned back ON, after clearing the runway, following landing.

.....so I loaded up the plane and moved to Middle-EEEE..........OIL..that is......

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Reply #2 - Nov 11^th, 2003 at 9:32am

Harrier Offline
Colonel
GR9
Liverpool

Gender:
Posts: 52

i noticed you said smoke and scenes as your questions already been answered i just thought id say on aerobatic jets (hawks etc.) that its diesel that forms the multi coloured smoke but i dont know i thats where it actually comes from?

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Reply #3 - Nov 11^th, 2003 at 9:44am