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How high can you fly?
Jim Logajan wrote:
Mark wrote: I keep running across new technologies and it takes time to come up with hard data and numbers that would allow me or anyone else to tell you what the new batteries weigh or what their energy density and durations are. I'm trying to point out that some of us have some of idea of what is possible within the next 10 years and what the ultimate physical limits are of energy density. Wikipedia has a table of energy densities for several battery technologies compared with traditional energy storage: http://en.wikipedia.org/wiki/Energy_density So far as I can tell it appears roughly correct. Avgas has an energy density of ~44MJ/kg. The best _emerging_ battery technology has an energy density of ~3.6MJ/kg. Ground vehicles can still be useful with low energy densities, but aircraft rapidly decline in utility. Put another way, airlines will be flying jets burning jet fuel for the forseeable future. The only aviation market I can see for electric airplanes, if batteries ever get good enough and cheap enough, is for self launched gliders. -- Jim Pennino Remove .spam.sux to reply. |
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How high can you fly?
Mark wrote:
On Sun, 19 Sep 2010 14:44:28 -0000, wrote: Jim Logajan wrote: Mark wrote: I keep running across new technologies and it takes time to come up with hard data and numbers that would allow me or anyone else to tell you what the new batteries weigh or what their energy density and durations are. I'm trying to point out that some of us have some of idea of what is possible within the next 10 years and what the ultimate physical limits are of energy density. Wikipedia has a table of energy densities for several battery technologies compared with traditional energy storage: http://en.wikipedia.org/wiki/Energy_density So far as I can tell it appears roughly correct. Avgas has an energy density of ~44MJ/kg. The best _emerging_ battery technology has an energy density of ~3.6MJ/kg. Ground vehicles can still be useful with low energy densities, but aircraft rapidly decline in utility. Put another way, airlines will be flying jets burning jet fuel for the forseeable future. The only aviation market I can see for electric airplanes, if batteries ever get good enough and cheap enough, is for self launched gliders. Doesn't surprise me, you have no vision. Most people don't which is why I am wealthy beyond your imagination. Get on board. I can make you loads of money. You could afford to buy a hat for your pinhead. Mark Of The Financial World More like Mark the babbling child-man. -- Jim Pennino Remove .spam.sux to reply. |
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