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air powered car
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air powered car
In article
, pig brother wrote: http://www.guardian.co.uk/environmen...r-hybrid-franc e Yet more balonium-based technology! -- Remove _'s from email address to talk to me. |
#3
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air powered car
Orval Fairbairn wrote:
In article , pig brother wrote: http://www.guardian.co.uk/environmen...r-hybrid-franc e Yet more balonium-based technology! Well, I believe compressed air vehicles have been used in special environments like coalmines where there is a risk of explosions. Wikipedia has info. The main problem is the inefficiency which arises from the heat lost in the compression and expansion cycle. T. |
#4
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air powered car
In article ,
Tom P wrote: Orval Fairbairn wrote: In article , pig brother wrote: http://www.guardian.co.uk/environmen...-car-hybrid-fr anc e Yet more balonium-based technology! Well, I believe compressed air vehicles have been used in special environments like coalmines where there is a risk of explosions. Wikipedia has info. The main problem is the inefficiency which arises from the heat lost in the compression and expansion cycle. T. .... and the poor energy density of the compressed air. The only way they would work is if they all had a LONG air hose connected to them! -- Remove _'s from email address to talk to me. |
#5
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air powered car
"Tom P" wrote in message ... Orval Fairbairn wrote: In article , pig brother wrote: http://www.guardian.co.uk/environmen...r-hybrid-franc e Yet more balonium-based technology! Well, I believe compressed air vehicles have been used in special environments like coalmines where there is a risk of explosions. Not just in special environments. Several French cities had compresssed air tram systems in the late 19th / early 20th century. They were tested in Britain, but rejected on the grounds of operating costs. The French systems were later electrified. Wikipedia has info. The main problem is the inefficiency which arises from the heat lost in the compression and expansion cycle. Stored steam was a more satisfactory system for fireless locomotives, but still not that good. However, the reservoirs for both compressed air locomotives and stored steam locomotives were a lot bigger than you could fit into a car. Colin Bignell |
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air powered car
On Fri, 15 May 2009 08:36:30 +0100, "nightjar" cpb@insert my surname
here.me.uk wrote: Several French cities had compresssed air tram systems in the late 19th / early 20th century. They were tested in Britain, but rejected on the grounds of operating costs. The French systems were later electrified. Brunel tried it on the Broad Gauge, however just because it didnt work with leather and tallow doesnt mean it cannot work now or in the future. -- Mike |
#7
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air powered car
On Fri, 15 May 2009 08:47:15 +0100, "Mike"
wrote: On Fri, 15 May 2009 08:36:30 +0100, "nightjar" cpb@insert my surname here.me.uk wrote: Several French cities had compresssed air tram systems in the late 19th / early 20th century. They were tested in Britain, but rejected on the grounds of operating costs. The French systems were later electrified. Brunel tried it on the Broad Gauge, however just because it didnt work with leather and tallow doesnt mean it cannot work now or in the future. Makin a compressedair-powered car is a fairly simple engineering problem. Making one that makes sense economically is almost impossible unless it's intended for a specialize usage where cost isn't a concern. The simple fact is that themodynamics is against the common usage of compressed air vehicles. You have to use a lot of energy to compress the air, and a large part of that energy is lost when releasing the air. It's easy to think that because there's no heat involved thermodynamics doesn't apply, but it does. -- ************* DAVE HATUNEN ) ************* * Tucson Arizona, out where the cacti grow * * My typos & mispellings are intentional copyright traps * |
#8
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air powered car
"Mike" wrote in message ... On Fri, 15 May 2009 08:36:30 +0100, "nightjar" cpb@insert my surname here.me.uk wrote: Several French cities had compresssed air tram systems in the late 19th / early 20th century. They were tested in Britain, but rejected on the grounds of operating costs. The French systems were later electrified. Brunel tried it on the Broad Gauge, however just because it didnt work with leather and tallow doesnt mean it cannot work now or in the future. Brunel's atmospheric railway used fixed pumping stations and was, effectively, a linear motor system. That is a lot different in principle to using compressed air from on-board reservoirs to run an expansion engine. Colin Bignell |
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air powered car
On May 15, 6:59*pm, "nightjar" cpb@insert my surname here.me.uk
wrote: "Mike" wrote in message ... On Fri, 15 May 2009 08:36:30 +0100, "nightjar" cpb@insert my surname here.me.uk wrote: Several French cities had compresssed air tram systems in the late 19th / early 20th century. They were tested in Britain, but rejected on the grounds of operating costs. The French systems were later electrified. Brunel tried it on the Broad Gauge, however just because it didnt work with leather and tallow doesnt mean it cannot work now or in the future. Brunel's atmospheric railway used fixed pumping stations and was, effectively, a linear motor system. That is a lot different in principle to using compressed air from on-board reservoirs to run an expansion engine. Colin Bignell less rats too |
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air powered car
On May 15, 9:10*pm, hackamore wrote:
http://www.guardian.co.uk/environmen...owered-car-hyb.... e Yet more balonium-based technology! Well, I believe compressed air vehicles have been used in special environments like coalmines where there is a risk of explosions. Wikipedia has info. The main problem is the inefficiency which arises from the heat lost in the compression and expansion cycle. T. Hi, the article was on an experimental vehicle used only on airport grounds. no real range, not fast enough even for city traffic, and only "green" if you neglect to count the pollution created by the power plant to run the compressor, the petrochemicals for the air tanks, etc. someone probably said that about cars v horses some time back......was that you ? although....thinking about it....perhaps we should have stuck with horses ;-) |
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