The official aviation quiz topic!

Andries · Post by **Andries** » 04 Apr 2005, 03:19

Here we go :

What was the exact flightnumber of the cargo aircraft that landed on his belly and overshot the runway @ EBOS in 1998.

I don't need a company name or aircraft type, I want the flightnumber ...

Enjoy the search ...

Greetz,

Andries

Andries · Post by **Andries** » 04 Apr 2005, 12:30

Correct TBSC,

looks like its your turn again !

Greetz,

Andries

Avro · Post by **Avro** » 06 Apr 2005, 15:25

I say 14.

Avro · Post by **Avro** » 06 Apr 2005, 15:50

OK so now it's my turn:

It's a little bit more technical and has to do with Concorde.

If you look closely on the following picture: here, you'll see a small "gap" between the engine inlet and the wingstructure itself.
There is a reason why there is a gap at that place and I would like to know the answer to that ?

Chris

HorsePower · Post by **HorsePower** » 06 Apr 2005, 16:52

Is it due to dilatation phenomen

? or is it due to avoid the "pressurized" layer of air on the intrados surface?

Seb.

Avro · Post by **Avro** » 06 Apr 2005, 17:32

Nope it has nothing to do with dilatation.

Could you elaborate your second point, because I don't understand what you want to say ?

Chris

Andries · Post by **Andries** » 06 Apr 2005, 19:31

When air flows over a surface at high speed, it forms some kind of boundary layer over that surcafe. This 'space' as you can it is where that layer passes. This way that layer doesn't come into the engine and the engine works at its maximum. ("zo hoog mogelijk rendement")

Similar concepts are found on militairy jets like e.g. F-16 ...

http://www.airliners.net/open.file/809260/L/

As you can see on this picture, the air-intake is some distance away from the fuselage, indeed to avoid that boundary layer.

Greetz,

Andries

Avro · Post by **Avro** » 06 Apr 2005, 20:07

Correct Andires :dance:

The boundary layer on the fuselage is a very thin layer where the airflow is turbulent and not laminar.
Since a turbulent airflow inside the engine is bringing down the efficiency of the engine they leave the little gap between the inlet and the wing to prevent the turbulent airflow to penetrate inside the engine. Thanks to this design the air which penetrates the enigne will mostly be of a laminar nature.

It's your turn

Chris

Andries · Post by **Andries** » 06 Apr 2005, 22:48

When you walk around an airplane and you can see a fluorecent fluid dripping from the wingstip, what has happened or what is going on ???

Greetz,

Andries

MD-11 · Post by **MD-11** » 07 Apr 2005, 09:22

Hydraulic fluid leaking out?

Post by **luchtzak** » 07 Apr 2005, 09:53

The aircraft has been de-iced ?

Post by **sn26567** » 07 Apr 2005, 09:54

Spraying of pesticides?

rotor · Post by **rotor** » 07 Apr 2005, 10:46

A kind of Fluorescent stuff had been attached to the wing to visualize the airflow over that wing. They call it it "tufts" or something like that.

MD-11 · Post by **MD-11** » 09 Apr 2005, 12:33

Hello!!! Andries, we're waiting for your response! :teach:

Andries · Post by **Andries** » 09 Apr 2005, 12:54

All wrong ... sorry

I'll give you the answer and I'll just ask a new and simpeler question.

The answer is that the fluorecent fluid is an indicator fluid. Whenever a discharge of static electricity occurs (ussually at the wingtips) there is also some fire-extinguishing fluid released into the Fuel-jettison-pipe.
When this fluid is released, the fluorecent fluid is also released and creates a fluorecent spot on the underside of the wing. When a mechanic then checks the aircraft he should notice the spot, he should know what to do.

New question:

Why does the main landing gear of a Boeing B767 tilt forward instead of afterward like most aircraft ?

767 : http://www.airliners.net/open.file/811882/M/

777 : http://www.airliners.net/open.file/812870/M/

Greetz,

Andries

sab319 · Post by **sab319** » 09 Apr 2005, 14:46

Because the the back weals are attachted to the frame instead of the front weels??