- Sep 23, 2012
And the outboard nacelles appear to be smaller in diameter than the inner ones... Due to thrust reversers inboard or some extra equipment mounted on the inboard engines?
This is bugging me.
Photo Gallery - A380 lands in Sydney - Free Travel images | smh.com.au
I was looking at that photo (& then several others of different A380s on the ground) - is it an optical illusion or result of perspective that the outboard engines appear to be ever-so-slightly canted upwards compared to the inboard ones? Head-on pictures of A380s on the ground show it up slightly better perhaps: 10 years in the skies: the A380â€™s numbers add upÂ*| Airbus Press release
If this is real, then what is the reason for it? (I'm theorizing that it has something to do with how the wing deflects when loaded - but if its just an optical illusion then I'm gonna feel like a numpty)
Aero engineer reckons that the wake descends because of air density. It has been compressed and heated by the passage of the wing, but the compression wins. Winglets should reduce wake turbulence, as their sole reason is to reduce drag...in this instance the drag involved in creating the wake.
The wing bends quite a bit, and the shape on the ground is quite different to that in the air, especially once fuel is pumped out to the outer tanks. So, there may be a bit of difference in the alignment when on the ground, as I'm sure everything is designed to be straight, and at its most efficient, when in flight.
The nacelles are the same size as far as I know...even though the engine accessories are a bit different.
Can this be an expression of the principle of bouyancy?. A volume of dense air (compressed during its interaction with the airfoil) sinks not because its heavier but less bouyant. And the decay in bouyancy over time is due to the change in density to that of the surrounding atmosphere?
I just wanted to enquire about the classification of the 757.
In Australia, for the purposes of Wake Turbulence separation, the 757 is classified as a Heavy if leading, and a Medium if following. So, if number 1 in the sequence, you have to think of it as a Heavy and apply the Heavy wake turbulence separation to anything following it. If number 2, you think of it as a Medium and apply appropriate Wake Turbulence separation from whatever is in front.I just wanted to enquire about the classification of the 757.
Almost every time we see footage of an emergency aircraft evacuation, there are passengers that have taken their hand luggage down the slides with them. Time and time again, it's sparked a discussion about the selfishness of said passengers.
I was wondering, what actually happens to all the bags that do get left behind (as per crew instructions)? Obviously you'd never see them again if the aircraft is totally destroyed, but what about in cases where the aircraft remains intact? (I'm thinking of last week's Peruvian Airlines incident, as an example.) Would passengers be able to retrieve their belongings as soon as it's safe to do so, or would they remain on the aircraft for days while the investigation etc. is conducted?
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