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#11
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DANGER - CARBON FIBER FRAMES
On Fri, 22 Jul 2016 11:29:45 -0700, SMS wrote:
On 7/22/2016 9:38 AM, wrote: WARNING! IF YOU OWN A CARBON FIBER BICYCLE THAT IS MORE THAN TWO YEARS OLD - GET RID OF IT NOW!!! IT CAN CAUSE SERIOUS INJURY OR DEATH! Pretty common knowledge that carbon fiber ("carbon fiber" is a nice way of saying "plastic") frames, forks, seatposts, etc. have a limited useful life. This must be why my local airplane manufacturer (Boeing) is using this material all over its latest commercial jet designs. {Sure, planes are not jets. Is one model Colnago representative of all bikes?} |
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#12
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DANGER - CARBON FIBER FRAMES
On 26/07/16 07:55, Frank Miles wrote:
On Fri, 22 Jul 2016 11:29:45 -0700, SMS wrote: On 7/22/2016 9:38 AM, wrote: WARNING! IF YOU OWN A CARBON FIBER BICYCLE THAT IS MORE THAN TWO YEARS OLD - GET RID OF IT NOW!!! IT CAN CAUSE SERIOUS INJURY OR DEATH! Pretty common knowledge that carbon fiber ("carbon fiber" is a nice way of saying "plastic") frames, forks, seatposts, etc. have a limited useful life. This must be why my local airplane manufacturer (Boeing) is using this material all over its latest commercial jet designs. {Sure, planes are not jets. Is one model Colnago representative of all bikes?} Yes, there is a lot more to reliability than just material choice. I'm sure an ultra reliable bicycle frame can be manufactured from any of the common frame building materials. What's most important is how the materials is applied to the job. Wafer thin, close to stress limits, and prone to damage and collapse, are recipes for early disaster. -- JS |
#13
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DANGER - CARBON FIBER FRAMES
On 7/25/2016 2:55 PM, Frank Miles wrote:
On Fri, 22 Jul 2016 11:29:45 -0700, SMS wrote: On 7/22/2016 9:38 AM, wrote: WARNING! IF YOU OWN A CARBON FIBER BICYCLE THAT IS MORE THAN TWO YEARS OLD - GET RID OF IT NOW!!! IT CAN CAUSE SERIOUS INJURY OR DEATH! Pretty common knowledge that carbon fiber ("carbon fiber" is a nice way of saying "plastic") frames, forks, seatposts, etc. have a limited useful life. This must be why my local airplane manufacturer (Boeing) is using this material all over its latest commercial jet designs. http://www.seattletimes.com/business/boeing-readies-patch-for-fire-damaged-787/ They are also using aluminum https://vibrationdata.files.wordpress.com/2014/03/aloha.png. They are using CF because it's light and the fuel savings are worth the fragility. |
#14
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DANGER - CARBON FIBER FRAMES
On 7/25/2016 6:38 PM, sms wrote:
On 7/25/2016 2:55 PM, Frank Miles wrote: On Fri, 22 Jul 2016 11:29:45 -0700, SMS wrote: Pretty common knowledge that carbon fiber ("carbon fiber" is a nice way of saying "plastic") frames, forks, seatposts, etc. have a limited useful life. This must be why my local airplane manufacturer (Boeing) is using this material all over its latest commercial jet designs. http://www.seattletimes.com/business/boeing-readies-patch-for-fire-damaged-787/ They are also using aluminum https://vibrationdata.files.wordpress.com/2014/03/aloha.png. They are using CF because it's light and the fuel savings are worth the fragility. :-) According to SMS, they should make all aircraft out of steel. Or perhaps cast iron. -- - Frank Krygowski |
#15
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DANGER - CARBON FIBER FRAMES
Frank Krygowski writes:
On 7/25/2016 6:38 PM, sms wrote: On 7/25/2016 2:55 PM, Frank Miles wrote: On Fri, 22 Jul 2016 11:29:45 -0700, SMS wrote: Pretty common knowledge that carbon fiber ("carbon fiber" is a nice way of saying "plastic") frames, forks, seatposts, etc. have a limited useful life. This must be why my local airplane manufacturer (Boeing) is using this material all over its latest commercial jet designs. http://www.seattletimes.com/business/boeing-readies-patch-for-fire-damaged-787/ They are also using aluminum https://vibrationdata.files.wordpress.com/2014/03/aloha.png. They are using CF because it's light and the fuel savings are worth the fragility. :-) According to SMS, they should make all aircraft out of steel. Or perhaps cast iron. Spruce is real. -- |
#16
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DANGER - CARBON FIBER FRAMES
In article ,
Radey Shouman wrote: Frank Krygowski writes: .... :-) According to SMS, they should make all aircraft out of steel. Or perhaps cast iron. Spruce is real. Yes, but the Spruce Goose[1] only flew once. Hardly economical on multiple, long-haul flights. Perhaps it *should* have been made of spruce, rather than birch ?-) [1] https://en.wikipedia.org/wiki/Hughes_H-4_Hercules -- Dennis Davis |
#17
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DANGER - CARBON FIBER FRAMES
On Mon, 25 Jul 2016 15:38:12 -0700, sms
wrote: On 7/25/2016 2:55 PM, Frank Miles wrote: On Fri, 22 Jul 2016 11:29:45 -0700, SMS wrote: On 7/22/2016 9:38 AM, wrote: WARNING! IF YOU OWN A CARBON FIBER BICYCLE THAT IS MORE THAN TWO YEARS OLD - GET RID OF IT NOW!!! IT CAN CAUSE SERIOUS INJURY OR DEATH! Pretty common knowledge that carbon fiber ("carbon fiber" is a nice way of saying "plastic") frames, forks, seatposts, etc. have a limited useful life. This must be why my local airplane manufacturer (Boeing) is using this material all over its latest commercial jet designs. http://www.seattletimes.com/business/boeing-readies-patch-for-fire-damaged-787/ They are also using aluminum https://vibrationdata.files.wordpress.com/2014/03/aloha.png. They are using CF because it's light and the fuel savings are worth the fragility. The facts are that Boeing states that, by weight, the 787 is built using steel - 10%, Titanium - 15%, aluminum 20%, and composites 50%, and "other - 5%. So you are arguing that as the airplane is 50% composite it is fragile? Of course these silly people at Boeing just went ahead and built the damned thing out of crappy plastic in spite of everything. And of course their experience with the 777 is meaningless although they did discover that: "Reduced scheduled maintenance. Experience with the Boeing 777 proves that composite structures require less scheduled maintenance than noncomposite structures. For example, the 777 composite tail is 25 percent larger than the 767's aluminum tail, yet requires 35 percent fewer scheduled maintenance labor hours." And of course the experiences of Airbus with composites is meaningless. One can only imagine, I suppose, your astonishing knowledge of aircraft design and the use of composites in aircraft design. I am amazed that you choose to hide this vast knowledge. -- cheers, John B. |
#18
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DANGER - CARBON FIBER FRAMES
Dennis Davis writes:
In article , Radey Shouman wrote: Frank Krygowski writes: ... :-) According to SMS, they should make all aircraft out of steel. Or perhaps cast iron. Spruce is real. Yes, but the Spruce Goose[1] only flew once. Hardly economical on multiple, long-haul flights. Perhaps it *should* have been made of spruce, rather than birch ?-) [1] https://en.wikipedia.org/wiki/Hughes_H-4_Hercules The goose was *enormous*. That much aircraft quality spruce would be worth a fortune today. -- |
#19
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DANGER - CARBON FIBER FRAMES
On 7/26/2016 12:51 PM, Radey Shouman wrote:
Dennis Davis writes: Yes, but the Spruce Goose[1] only flew once. Hardly economical on multiple, long-haul flights. Perhaps it *should* have been made of spruce, rather than birch ?-) [1] https://en.wikipedia.org/wiki/Hughes_H-4_Hercules The goose was *enormous*. That much aircraft quality spruce would be worth a fortune today. The Spruce Goose _is_ *enormous* still. It's in a very nice aircraft museum in Oregon. http://www.evergreenmuseum.org/the-spruce-goose It's well worth a visit. -- - Frank Krygowski |
#20
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DANGER - CARBON FIBER FRAMES
On Tuesday, July 26, 2016 at 1:15:48 PM UTC-7, Frank Krygowski wrote:
On 7/26/2016 12:51 PM, Radey Shouman wrote: Dennis Davis writes: Yes, but the Spruce Goose[1] only flew once. Hardly economical on multiple, long-haul flights. Perhaps it *should* have been made of spruce, rather than birch ?-) [1] https://en.wikipedia.org/wiki/Hughes_H-4_Hercules The goose was *enormous*. That much aircraft quality spruce would be worth a fortune today. The Spruce Goose _is_ *enormous* still. It's in a very nice aircraft museum in Oregon. http://www.evergreenmuseum.org/the-spruce-goose It's well worth a visit. Yes, the Spruce Goose avoided liquidation in bankruptcy, but I'm told that significant portions of the incredible plane collection did not. I haven't been down there since Evergreen went down the toilet. -- Jay Beattie. |
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