BOEING 777 ENGINES LOVELY SOUND AND NICE VORTEX !

[donteatcheese]

Why does the vortex happen, havent really seen it on a turbine before, and is it the same as when an aircraft brakes the sound barrier?

[nismology]

Ckyliu is mostly right. The engine increases the velocity of the air greatly, and as a result the dynamic pressure at the inlet goes up. Since total air pressure must always remain constant at subsonic speeds, the static pressure goes down to match. When the vapor pressure exceeds the static air pressure, saturation occurs. And I think you meant to say dewpoint is RAISED to the ambient temp. :)

[ckyliu]

@nismology Well spotted, indeed I did mean the dewpoint is raised :-) Whoops!

[ikolkyo967]

Ge90 is the best

[tripleLUFC]

What is the misty vapour you can see when the engines are on full???

[furvert101]

@tripleLUFC my guess is compressed air, from the blades spinning so fast... they are spinning faster than mach speed so it creates a cloud effect the same as when a plane flies by at over mach speed or faster...

[ckyliu]

@tripleLUFC @furvert101 The suction at the air intake lowers the local air pressure, which also lowers the dewpoint of the air to its actual present temperature (basically lower pressure air can't hold as much water, so it sweats!)

The vapour is just water, you sometimes see the same effect over the wings during the landing phase. Obviously you need the correct blend of humidity, temperature and air pressure to see the effect.

Hope this answers your question :-)

[takkcertu]

Nice ....

[neocastillo]

Simon Lowe videos?

[boeingnerd77]

@neocastillo haki22's

which i belive gavce people oppertunity to copy the vids

[glowe5]

better then music

[kaitsho]

Rolls Royce Trent - nothing else even comes close

[danny1964ilovefilas]

nice sound but i miss the sound of a boeing 707 or dc-8 5/6 series

[Thebmwisthebest]

ahhhhhhh those Ge-90s

[trent8002003]

The Trent 800 is the best engine option on early 777s. Lighter, smaller and can do as well a job as the PW and GE products. In fact, the GE90 was the worst engine on 777-200s, 777-200ERs and 777-300s. BA ordered the Trent for its 2nd tranche of 777-200ERs after the GE powered first batch proved trouble prone. If it hadn't been for a brute force commerical move by GE to achieve exclusivity on the 777-300ERs and 777-200LRs, the Trent would have done very well indeed on those 2 birds as well.

[juiced2death]

hello everyone the first plane has ge90s the second one had trent82 k???

[ckyliu]

Hate to rain on all you GE90 fanboys parades... but the second aircraft has Rolls-Royce Trent 800s! It sounds much nicer too.

The Trent was the first engine to achieve 100,000 lbf and 115,000 lbf, long before the GE90 did. It's also the only 777 engine you can fit whole in a 747 freighter.And it's several hundred kilograms lighter than the GE90. Plus, it has a thrust range from 50,000 to 115,000 lbf, bigger than any other engine.

The Trent is the best big turbofan available today, no doubt.

[juiced2death]

1st airline pia 2nd singapore airlines probably the best airline in the world

[furvert101]

@ckyliu ok, so its half a ton lighter... 

[furvert101]

@ckyliu oh wait, i didnt read the whole comment lol. i thought you were talking about an airplane, not the engine.. lol!



[azmac78]

@ckyliu But GE engines dont blow up

[ckyliu]

@azmac78 Okay, so perhaps you'd care to explain what downed 737 G-OMBE and killed 47? An exploding CFM56 caused by a design flaw. Or how about the DC-10 N1819U at Sioux City which killed 111? Oh actually I remember now, that was an exploding CF6 caused by a manufacturing fault.

Now, you were saying something about "GE engines don't blow up", please continue...

[001jetman]

@ckyliu horseballs

[ckyliu]

@001jetman You've been on YouTube nearly 2 years and that's the best comment you've made so far. Oh dear, things are not going well for you are they? A sentence too much trouble is it? A well thought out argument too taxing on your mind? Thought so.

[EmadIV]

@ckyliu

At least someone here knows the Trent 8104 and the Trent 8115. But thanks to Boeing we don't get to see or hear those amazing engines.

[ckyliu]

@EmadIV Don't think we ever will either, doesn't look like any twins comparable to the 773ER are even on the drawing board. Still, at least some of the technology (such as contra-rotating spools) made it to production via the T900, T1000 and XWB. It'll be interesting to see what RR offer up for Boeing's Y1 and the Airbus NSR, as they've passed up on providing for the A320NEO and 737Max (another stupid name from Boeing, to go with "Dreamliner" ugh!)

[EmadIV]

@ckyliu

I agree, but if you look at it carefully the A350 is very very close to the 777. Only a few inches narrower, much longer in range, and is powered by the Trent XWB. I'm sure it will be great. It's good to know people who have brains!

[maxou5757]

@ckyliu Seriously? Of corse the Trent will be lighter, it's smaller and less powerful than the GE90-115. I like both, but lets be real, the GE90-115 is certainly more powerful. I dont even think there is a RR Trent engine that makes 115000 lbf

[ckyliu]

@maxou5757 You need to read all my comments on this video here my friend. RR got to 115,000 lbf before GE with the Trent 8115 and Trent 8104 was first through 100,000 lbf too! The Trent is smaller and lighter than the GE90 for the same thrust rating, up to 3.6 tonnes lighter per pair on a 777-300. A Trent 895-17 is lighter than a GE94B for example.

[maxou5757]

@ckyliu The 8104 and 8115 are not available on the 777-200LR and 300ER so we should not talk about them... Thing is that the most powerful jet engine available on a commercial aircraft at this time is the GE90-115 and nothing else. Of course the Trent 800 will be lighter and will fit in a 747, because it's smaller and less powerful. There is no Trent 800 on the market at this time with more than 95 000lbf.

[maxou5757]

@ckyliu I would take a Trent 895-17 before the GE94B, that's for sure. But the GE90-115 is just a fantastic engine, much like the Trent 800. By the way, the GE90-115 actually did 127 000lbf and hold a record for this.

[ckyliu]

@maxou5757 The GE90s advantage over Trent's is from lower fuel burn, emissions and noise (this is because of a much higher bypass ratio). Trent is more reliable, compact and lighter though. T800 definitely better on shorter legs, and still competitive on long.

However the Trent is available on many aircraft (777, A330, A340, 787, A350, plus related RB211 on the 757, 747, 767) which makes for economies of scale, the GE90 is only on the 777 (CF6 powers 747, 767, A330, GEnx on 748, 787)

[maxou5757]

@ckyliu That's what I thought. Those Trent 800 actually have a range between 75 000 and 95 000lbf which is less powerful than the GE90-115.

[ckyliu]

@maxou5757 There's nothing technically wrong with the 8105 and 8115, the reason you can't get them on the 777-Xs is because the contract GE has with Boeing is to be sole engine supplier, in exchange for GE being a risk sharing partner. 8115 is lighter than 115B.

No GE90 will fit a 747, even the low thrust ones, whereas every Trent will.

Trent goes from 53,000 to 95,000 lbf on a production basis, but you can get up to 115,000 lbf from the design as discussed. GE90 only 74-115k lbf.

[maxou5757]

@ckyliu You are comparing the whole Rolls Royce Trent jet engine line up against one model GE makes. Lets stick to the Trent 800 against the GE90. I do agree that the Trent 800 sounds better, I know both are excellent engine and I would also pick the Trent 800 over the GE94B. But for some 777 models such as the 200LR and 300ER, the GE90-110/115 is certainly a better choice. This said, I didnt know the Trent 800 is more reliable. Do you have any statistics for this?

[ckyliu]

@maxou5757 Comparing the whole Trent lineup against the whole GE90 lineup :-) I can't help it if GE make you have the CF6 and GE90 for the same thrust range the Trent covers. There is no engine choice on the 200LR and 300ER, you have GE or you go without, that's GECAS commercial might making itself felt!

Don't have any current stats to hand on GE90 dispatch reliability, early models were bad (that's why BA's 2nd 777 batch switched to RR from GE) but I think they're a lot better now.

[maxou5757]

@ckyliu Well they call their jet engines a different way. You can have Trent engines on an Airbus A330, A340, A380, B777 etc. The GE90 is a family engine for the 777 only so of course they wont produce engine that makes 50 000lbf of thrust for the B777 just as the Trent 800 is a family engine for the 777 only which have a range from 75 000 up to 95 000lbf of thrust.

[maxou5757]

@ckyliu I dont think we can consider this as an argument for ''which one is better than the other''. Both brands are capable of producing 20 000lbf jet engines or 115 000lbf of thrust engines ! I actually think BA switched to Rolls Royce because they buy their own products (RR is british so...) and help their own economy. To date, the GE90-115B has experienced no in-flight shutdowns and enjoys an engine departure reliability of 99.97 percent. I dont know about RR but this is near perfect.

[ckyliu]

@maxou5757 It isn't just nomenclature though, all Trent engines share the same basic core design and quite a few parts, they are from the same family (late RB211s even have Trent cores). The CF6 is totally different to the GE90, it is a separate family, and so is the EA GP7200.

Politics does not factor in BA procurement decisions, they are a publicly traded stock company there to make profits for their shareholders, and the same goes for Rolls-Royce.

[ckyliu]

@maxou5757 I'm not necessarily saying RR engines are better, but I think that GE owes quite a bit of its success to the fact it is first and foremost a finance company; it has purchasing clout thanks to GECAS. The 777-X and 747-8 engine exclusivity deals were based on the finance and sales GE was able to offer, not technical superiority. The fact that Trent is the best selling engine on the on the 777 (if we exclude the 777-X) supports that - customers preferred them.

[ursjan]

The GE 90 -115 b have a most beatiful sound of engines on the world. the more beatiful than sound of Porsche engines.

[111danish111]

The most powerfull engines in the world . More powerfull than the A380 engines !!!

[arthurmee]

awesome capture!

[4ndywy4ll]

oh my god... the energy here is fantastic.

[Alddahh]

ge90 sounds awesome