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Old 01-30-2008, 03:48 PM   #1
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Question B747-800

I am very confused. What is the difference between a 747-800 and a 747-400? They look exactly the same! It doesnt look like a stretched version up top, and i thought Boeing abandonned that idea when the whole UHCA idea thing was going on between them and Airbus. Can someone tell me the difference?
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Old 01-30-2008, 03:56 PM   #2
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Default Re: B747-800

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I am very confused. What is the difference between a 747-800 and a 747-400? They look exactly the same! It doesnt look like a stretched version up top, and i thought Boeing abandonned that idea when the whole UHCA idea thing was going on between them and Airbus. Can someone tell me the difference?
The 747-800 has no winglets , one of the most obvious things. The wingtips are raked. The upper deck definitely looks stretched, and the engine nacelles are different from other jets...The Boeing 787 has the same look I think.. But I'll leave the other experts here to fill you in with more of the specifications.
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Old 01-30-2008, 04:06 PM   #3
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Default Re: B747-800

are nacelles the little pointy cone thing on the inside with the spirales on it?
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Old 01-30-2008, 04:09 PM   #4
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Default Re: B747-800

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are nacelles the little pointy cone thing on the inside with the spirales on it?
Yes that would be it...(too terrified to be the one explaining things here, esp when it should be left to the Gods to answer....(Do I hear a distant thunder ..the Gods approach!!!)
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Old 01-30-2008, 04:26 PM   #5
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Default Re: B747-800


you seriously dont think its stretched on top? probably gotta go check your eyes sir.
nacelles are the entire casing holding and covering the engines. those triangles at the end are noise reducing chevrons, i assume they mix airflow differently so its less noise in the cabin and perhaps more aerodynamic. those GEnx engines are also larger than the current GE, RR or PW engines

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are nacelles the little pointy cone thing on the inside with the spirales on it?
personally there, i have no idea what you are referring to. im guessing youre referring to the fan cone.
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Old 01-30-2008, 04:33 PM   #6
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One of dem Gods have spoken..
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Old 01-30-2008, 04:37 PM   #7
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Default Re: B747-800

only a demigod. JK. wikipedia.org is the guru here
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Old 01-30-2008, 04:38 PM   #8
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Default Re: B747-800

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are nacelles the little pointy cone thing on the inside with the spirales on it?
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Originally Posted by B-16707 View Post
personally there, i have no idea what you are referring to. im guessing youre referring to the fan cone.
I thought he was referring to the nacelles themselves which have the pointy cone like shapes at the end of it... Like on the 747-800 and the 787 (Should have left it to you guys to answer)

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Old 01-30-2008, 04:43 PM   #9
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only a demigod. JK. wikipedia.org is the guru here
Okay then, one of dem demi-gods have spoken
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Old 01-30-2008, 04:45 PM   #10
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The nacelles are the covered housings.
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Old 01-30-2008, 04:48 PM   #11
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Default Re: B747-800

hmmmm now that i look at it more carefully there definitely is a bigger top and i have now leared what nacelles are. they're the whole entire covering of the engine right?(the painted part of the engines in this case). and yes B-16707 you are indeed a demi-god and i idolise you. you and your airport are an inspiration and i hope to one day have an airport half as good as yours.
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Old 01-30-2008, 04:54 PM   #12
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and yes B-16707 you are indeed a demi-god and i idolise you. you and your airport are an inspiration and i hope to one day have an airport half as good as yours.
Kai, I mean B-16707 you just got upgraded from demi god to God...
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Old 01-30-2008, 05:29 PM   #13
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I am very confused. What is the difference between a 747-800 and a 747-400?
For the record, it's not called B747-800 but rather B747-8IC (pax) and B747-8F (cargo).
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Old 01-30-2008, 05:32 PM   #14
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Default Re: B747-800

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Originally Posted by Gargle Jus View Post
hmmmm now that i look at it more carefully there definitely is a bigger top and i have now leared what nacelles are. they're the whole entire covering of the engine right?(the painted part of the engines in this case). and yes B-16707 you are indeed a demi-god and i idolise you. you and your airport are an inspiration and i hope to one day have an airport half as good as yours.
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Kai, I mean B-16707 you just got upgraded from demi god to God...
lol i appreciate the appreciation but im not a god. just another individual out there to inspire and be inspired back.
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Old 01-30-2008, 05:39 PM   #15
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For the record, it's not called B747-800 but rather B747-8IC (pax) and B747-8F (cargo).
Okay, I had to look that one up to find out why Boeing refers to it as a B747-8IC. IC = Intercontinental. Interesting.
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Old 01-30-2008, 06:25 PM   #16
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Default Re: B747-800

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Originally Posted by 1:200Freak View Post
I thought he was referring to the nacelles themselves which have the pointy cone like shapes at the end of it... Like on the 747-800 and the 787 (Should have left it to you guys to answer)

you are referring to the noise-reducing chevrons ... they cause interference patterns in the air which help muffle the noise of the exhaust
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Old 01-31-2008, 02:48 PM   #17
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Okay, I had to look that one up to find out why Boeing refers to it as a B747-8IC.
Good to hear that! There's a lot of info on their website...the same can be said about Airbus too.
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Old 01-31-2008, 03:14 PM   #18
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Default Re: B747-800

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I am very confused. What is the difference between a 747-800 and a 747-400? They look exactly the same! It doesnt look like a stretched version up top, and i thought Boeing abandonned that idea when the whole UHCA idea thing was going on between them and Airbus. Can someone tell me the difference?
You can see the dimension differences on this link.

Freak posted this link on Mr.CX thread.

Boeing's New Airplane - the 747-8 Intercontinental
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