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#11
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"Gord Beaman" wrote in message
... "Keith Willshaw" wrote: "Gord Beaman" wrote in message .. . Steve Hix wrote: Well, speaking of size, doesn't it look pretty small for an RB-211?...I googled for info and found that the fan on a 211 is 6.5 feet in diameter. I realize that the fan is gonna be bigger than the turbine/compressor discs but this one looks to be maybe 2.5 to 3 feet wide judging from the fireman's leg in the foreground. Seems a bit small doesn't it?. My brother, whos a turbine engineer tells me the inner compression disks of this engine are between 29 and 41 inches in diameter and it looks like that section to him. The IP compression stage is behind the main fan which which would have taken the brunt of any impact. Keith Ok thanks Keith...I did notice in the info that I found that there was a surprisingly large difference in diameter between the fan and the other discs (just going by a sketch that I saw) Sorry if I'm being dense here but isn't this the whole point of a modern turbofan? John |
#12
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"John Mullen" wrote in message ... "Gord Beaman" wrote in message ... "Keith Willshaw" wrote: Ok thanks Keith...I did notice in the info that I found that there was a surprisingly large difference in diameter between the fan and the other discs (just going by a sketch that I saw) Sorry if I'm being dense here but isn't this the whole point of a modern turbofan? Indeed, there's a nice picture at the URL below which shows the sort of relationship between fan and core sizes on high bypass engines. http://home.swipnet.se/~w-65189/tran...747_series.htm Keith |
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#15
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"John Mullen" wrote:
"Gord Beaman" wrote in message .. . "Keith Willshaw" wrote: "Gord Beaman" wrote in message .. . Steve Hix wrote: Well, speaking of size, doesn't it look pretty small for an RB-211?...I googled for info and found that the fan on a 211 is 6.5 feet in diameter. I realize that the fan is gonna be bigger than the turbine/compressor discs but this one looks to be maybe 2.5 to 3 feet wide judging from the fireman's leg in the foreground. Seems a bit small doesn't it?. My brother, whos a turbine engineer tells me the inner compression disks of this engine are between 29 and 41 inches in diameter and it looks like that section to him. The IP compression stage is behind the main fan which which would have taken the brunt of any impact. Keith Ok thanks Keith...I did notice in the info that I found that there was a surprisingly large difference in diameter between the fan and the other discs (just going by a sketch that I saw) Sorry if I'm being dense here but isn't this the whole point of a modern turbofan? John Well, I don't know if 'the whole point' is a valid assessment but yes, the fan is larger than the compressor discs on turbofan engines. Just seemed to be out of proportion to me. The discs in that photo seemed smaller than I expected to see from a 757 engine, that's all. But by Keith's answer it seems ok... -- -Gord. |
#16
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On 17 Oct 2003 19:11:53 GMT, B2431 wrote:
Don't you guys understand the black helicopters are on our side? Do you really believe we have learned nothing from the space aliens held at Area 51? Actually the space aliens are just a cover story. Area 51 is *really* the seat of the Illuminati Secret World Government. -- "It's easier to find people online who openly support the KKK than people who openly support the RIAA" -- comment on Wikipedia (My real email address would be if you added 275 to it and reversed the last two letters). |
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