If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#71
|
|||
|
|||
Boeing 747 turns 35 Years Old
not necessarily - volume varies linearly with length, as the square of the
radius You can have "short and fat" (747-SP) and 747-200 (same upper deck) - no doubt that the -200 has a larger volume (longer) but the same "diameter' unless you meant the if you make it fatter, you need to make it longer (and that isn't necessarily true, either) "devil" wrote in message news On Thu, 19 Feb 2004 20:19:43 +0800, Nik wrote: "Ulf Kutzner" wrote in message ... Nik schrieb: "devil" wrote in message news On Wed, 18 Feb 2004 23:07:21 +0800, Nik wrote: "Ulf Kutzner" wrote in message ... Nik schrieb: To put it into perspective: The 380 is intended to improve the seat/mile cost compared to the 747 by about 20 percent. A significant part of this is no doubt being achieved by making the 380 bigger than the 747 - volume grows by the power of two compared to the surface. Sure? Regards, ULF Sure? - well I have no clue as to whether or not they will succeed. Therefore I deliberately wrote "intended" as this is what they (at least at some point) said on their web page (haven't looked recently at this issue). I think his point was that volume does not usually go with the square of the surface... Oh I see he don't know the formulas for surface and volume of a cylinder. Your cylinders only have diameters, no length? Just tell me more. http://www.airliners.net/info/stats.main?id=29 Regards, ULF 2PiRD versus PiR^2D (as far as I remember from many many years ago) Point is that if you make your fish fatter, you make it longer too. |
#72
|
|||
|
|||
Boeing 747 turns 35 Years Old
"devil" wrote in message news On Thu, 19 Feb 2004 20:19:43 +0800, Nik wrote: "Ulf Kutzner" wrote in message ... Nik schrieb: "devil" wrote in message news On Wed, 18 Feb 2004 23:07:21 +0800, Nik wrote: "Ulf Kutzner" wrote in message ... Nik schrieb: To put it into perspective: The 380 is intended to improve the seat/mile cost compared to the 747 by about 20 percent. A significant part of this is no doubt being achieved by making the 380 bigger than the 747 - volume grows by the power of two compared to the surface. Sure? Regards, ULF Sure? - well I have no clue as to whether or not they will succeed. Therefore I deliberately wrote "intended" as this is what they (at least at some point) said on their web page (haven't looked recently at this issue). I think his point was that volume does not usually go with the square of the surface... Oh I see he don't know the formulas for surface and volume of a cylinder. Your cylinders only have diameters, no length? Just tell me more. http://www.airliners.net/info/stats.main?id=29 Regards, ULF 2PiRD versus PiR^2D (as far as I remember from many many years ago) Point is that if you make your fish fatter, you make it longer too. Well that's correct (I did say that math is a long way back). However, the 747-400 and the A380 are supposed to be of about the same length: about 71 m compared to 75 m as far as I remember. So by far (so it seems to me) the extra volume in the A380 is going to come from making it thicker rather then just longer... Nik. |
#73
|
|||
|
|||
Boeing 747 turns 35 Years Old
I took it that the 747 and the A380 were to be of about the same length 71
versus 75 meters... Nik. "DALing" daling43[delete]-at-hotmail.com wrote in message ... not necessarily - volume varies linearly with length, as the square of the radius You can have "short and fat" (747-SP) and 747-200 (same upper deck) - no doubt that the -200 has a larger volume (longer) but the same "diameter' unless you meant the if you make it fatter, you need to make it longer (and that isn't necessarily true, either) "devil" wrote in message news On Thu, 19 Feb 2004 20:19:43 +0800, Nik wrote: "Ulf Kutzner" wrote in message ... Nik schrieb: "devil" wrote in message news On Wed, 18 Feb 2004 23:07:21 +0800, Nik wrote: "Ulf Kutzner" wrote in message ... Nik schrieb: To put it into perspective: The 380 is intended to improve the seat/mile cost compared to the 747 by about 20 percent. A significant part of this is no doubt being achieved by making the 380 bigger than the 747 - volume grows by the power of two compared to the surface. Sure? Regards, ULF Sure? - well I have no clue as to whether or not they will succeed. Therefore I deliberately wrote "intended" as this is what they (at least at some point) said on their web page (haven't looked recently at this issue). I think his point was that volume does not usually go with the square of the surface... Oh I see he don't know the formulas for surface and volume of a cylinder. Your cylinders only have diameters, no length? Just tell me more. http://www.airliners.net/info/stats.main?id=29 Regards, ULF 2PiRD versus PiR^2D (as far as I remember from many many years ago) Point is that if you make your fish fatter, you make it longer too. |
#74
|
|||
|
|||
Boeing 747 turns 35 Years Old
On Thu, 19 Feb 2004 21:16:16 +0000, DALing wrote:
not necessarily - volume varies linearly with length, as the square of the radius You can have "short and fat" (747-SP) and 747-200 (same upper deck) - no doubt that the -200 has a larger volume (longer) but the same "diameter' unless you meant the if you make it fatter, you need to make it longer (and that isn't necessarily true, either) Not necessarily. But odds are, if you make itr fatter, you'll make it longer also. Not necessarily in the same ratios either. Still, surely a better assumption to make both vary in the same proportion than keeping the length fixed and only change the diameter. "devil" wrote in message news On Thu, 19 Feb 2004 20:19:43 +0800, Nik wrote: "Ulf Kutzner" wrote in message ... Nik schrieb: "devil" wrote in message news On Wed, 18 Feb 2004 23:07:21 +0800, Nik wrote: "Ulf Kutzner" wrote in message ... Nik schrieb: To put it into perspective: The 380 is intended to improve the seat/mile cost compared to the 747 by about 20 percent. A significant part of this is no doubt being achieved by making the 380 bigger than the 747 - volume grows by the power of two compared to the surface. Sure? Regards, ULF Sure? - well I have no clue as to whether or not they will succeed. Therefore I deliberately wrote "intended" as this is what they (at least at some point) said on their web page (haven't looked recently at this issue). I think his point was that volume does not usually go with the square of the surface... Oh I see he don't know the formulas for surface and volume of a cylinder. Your cylinders only have diameters, no length? Just tell me more. http://www.airliners.net/info/stats.main?id=29 Regards, ULF 2PiRD versus PiR^2D (as far as I remember from many many years ago) Point is that if you make your fish fatter, you make it longer too. |
#75
|
|||
|
|||
Boeing 747 turns 35 Years Old
On Fri, 20 Feb 2004 07:49:25 +0800, Nik wrote:
I took it that the 747 and the A380 were to be of about the same length 71 versus 75 meters... Making it just fatter without changing the length would probably make it less efficient at least relatively? "DALing" daling43[delete]-at-hotmail.com wrote in message ... not necessarily - volume varies linearly with length, as the square of the radius You can have "short and fat" (747-SP) and 747-200 (same upper deck) - no doubt that the -200 has a larger volume (longer) but the same "diameter' unless you meant the if you make it fatter, you need to make it longer (and that isn't necessarily true, either) "devil" wrote in message news On Thu, 19 Feb 2004 20:19:43 +0800, Nik wrote: "Ulf Kutzner" wrote in message ... Nik schrieb: "devil" wrote in message news On Wed, 18 Feb 2004 23:07:21 +0800, Nik wrote: "Ulf Kutzner" wrote in message ... Nik schrieb: To put it into perspective: The 380 is intended to improve the seat/mile cost compared to the 747 by about 20 percent. A significant part of this is no doubt being achieved by making the 380 bigger than the 747 - volume grows by the power of two compared to the surface. Sure? Regards, ULF Sure? - well I have no clue as to whether or not they will succeed. Therefore I deliberately wrote "intended" as this is what they (at least at some point) said on their web page (haven't looked recently at this issue). I think his point was that volume does not usually go with the square of the surface... Oh I see he don't know the formulas for surface and volume of a cylinder. Your cylinders only have diameters, no length? Just tell me more. http://www.airliners.net/info/stats.main?id=29 Regards, ULF 2PiRD versus PiR^2D (as far as I remember from many many years ago) Point is that if you make your fish fatter, you make it longer too. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Boeing design practice | Dick Locke | Air travel | 38 | January 13th, 2004 06:13 PM |
Boeing to launch 7E7 today (tuesday) | nobody | Air travel | 20 | December 24th, 2003 10:16 AM |
Winglets in Southwest | Alec D. Plotkin | Air travel | 6 | November 20th, 2003 04:42 PM |
Oldest Operational Boeing 707? | Dan Foster | Air travel | 6 | October 15th, 2003 03:48 AM |
SIA Crew vs Boeing Test Pilots (was SQ222 Diversion) | Vector | Air travel | 13 | September 16th, 2003 09:01 AM |