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#31
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How Beat The High Cost Of Fuel: The ElectraFlyer-C
On Jun 21, 11:42 pm, Richard Riley wrote:
On Jun 16, 7:37 pm, Larry Dighera wrote: How Beat The High Cost Of Fuel The motor is powered by a 78 pound, custom-built lithium-ion polymer battery with a power output of "5.6 kilowatt hours"; projected life is 300 to 500 full discharge cycles or more than 1,000 partial cycles. The battery can be recharged in as little as two hours using a 220-volt charger (or six hours with a 110-volt charger). The cost for a full recharge is 70 cents with the 110-volt charger. Fishman says it's feasible to carry a small 110-volt charger as baggage on cross-country flights. 1 horsepower = .75kw. So 5.6 kilowatt hours is only 7.51 horsepower hours. Good enough for a short burst to get you to altitude and soar the thermals, bu you aren't going anywhere cross country. Compare it to a really inefficient 2 stroke, burning .6 lb/hp-hr. Your battery is equal to .75 gallons of gas. The technology is immature, but this is on the right track. When a suitable battery is invented, there is no arguing that it will easily replace small gasoline engines. And battery development is just getting started, so things can only get better. We have not invested in batteries other than for portable electronics. I am sure many in 1903 argued that a horse drawn carriage could go much farther and safer than the Wright flyer. |
#32
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How Beat The High Cost Of Fuel: The ElectraFlyer-C
In rec.aviation.piloting Andrew Sarangan wrote:
On Jun 21, 11:42 pm, Richard Riley wrote: On Jun 16, 7:37 pm, Larry Dighera wrote: How Beat The High Cost Of Fuel The motor is powered by a 78 pound, custom-built lithium-ion polymer battery with a power output of "5.6 kilowatt hours"; projected life is 300 to 500 full discharge cycles or more than 1,000 partial cycles. The battery can be recharged in as little as two hours using a 220-volt charger (or six hours with a 110-volt charger). The cost for a full recharge is 70 cents with the 110-volt charger. Fishman says it's feasible to carry a small 110-volt charger as baggage on cross-country flights. 1 horsepower = .75kw. So 5.6 kilowatt hours is only 7.51 horsepower hours. Good enough for a short burst to get you to altitude and soar the thermals, bu you aren't going anywhere cross country. Compare it to a really inefficient 2 stroke, burning .6 lb/hp-hr. Your battery is equal to .75 gallons of gas. The technology is immature, but this is on the right track. When a suitable battery is invented, there is no arguing that it will easily replace small gasoline engines. And when fustion reactors are invented they will replace coal and fission plants. And when anti-gravity is invented, it will replace airplanes. And when... And battery development is just getting started, so things can only get better. Batteries have been under development for well over a hundred years. We have not invested in batteries other than for portable electronics. What do you think powered ALL the world's submerged submarines before the Nautilus was launched in 1954? What do you think powers the stuff in torpedoes and missiles and has for about a half century, an extension cord? Have you any idea what has powered telephone offices for over a century? Do you know what a UPS is and have you ever seen one the size of a small house? I am sure many in 1903 argued that a horse drawn carriage could go much farther and safer than the Wright flyer. In 1903 both the airplane and the car were new; it is now 105 years later. -- Jim Pennino Remove .spam.sux to reply. |
#33
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How Beat The High Cost Of Fuel: The ElectraFlyer-C
Larry Dighera wrote:
On Mon, 23 Jun 2008 14:40:39 -0500, Gig 601Xl Builder wrote in : And what is the waste product for Aluminum burned in air? Really I don't have a clue. It's been way too long since I took chem to remember the reaction, but I'd speculate that it would be aluminum oxide. In other words... "Sapphire"... :-) |
#34
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How Beat The High Cost Of Fuel: The ElectraFlyer-C
Jim Logajan wrote:
Gig 601Xl Builder wrote: And what is the waste product for Aluminum burned in air? Really I don't have a clue. Likely combustion equation: 4Al + 3O2 - 2Al2O3 The result on the right is Sapphire. Or sandpaper unless you got it hot enough and cooled it slow enough. -- Jim Pennino Remove .spam.sux to reply. |
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How Beat The High Cost Of Fuel: The ElectraFlyer-C
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#37
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How Beat The High Cost Of Fuel: The ElectraFlyer-C
On Tue, 24 Jun 2008 08:19:52 -0400, "Peter Dohm"
wrote: "Scott" wrote in message . .. wrote: In rec.aviation.piloting Andrew Sarangan wrote: On Jun 21, 11:42 pm, Richard Riley wrote: On Jun 16, 7:37 pm, Larry Dighera wrote: How Beat The High Cost Of Fuel The capacity and endurance numbers still look wrong to me--unless the demonstration aircraft is using two of the largest battery packs. But the point is that these technologies will remain immature for the remaining lifetimes of most members of this group. Also, in case anyone has not been watching, gasolene engines have continued to mature and now weigh less than the did just twenty years ago. Peter I was looking at one of my sons model aircraft batteries. a LiPo about the size of a cigarette packet. the maximim current draw was 54 amps!!!! some of this technology has the potential to go somewhere if it hasnt already plateaued (sp) In the meantime I'll watch, and burn 100/130 avgas. Stealth Pilot |
#38
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How Beat The High Cost Of Fuel: The ElectraFlyer-C
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#39
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How Beat The High Cost Of Fuel: The ElectraFlyer-C
Gig 601Xl Builder wrote:
wrote: Jim Logajan wrote: Gig 601Xl Builder wrote: And what is the waste product for Aluminum burned in air? Really I don't have a clue. Likely combustion equation: 4Al + 3O2 - 2Al2O3 The result on the right is Sapphire. Or sandpaper unless you got it hot enough and cooled it slow enough. That can't be good for exhaust valves. Neither is the 7000 degree flame temperature. -- Jim Pennino Remove .spam.sux to reply. |
#40
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How Beat The High Cost Of Fuel: The ElectraFlyer-C
wrote:
Gig 601Xl Builder wrote: wrote: Jim Logajan wrote: Gig 601Xl Builder wrote: And what is the waste product for Aluminum burned in air? Really I don't have a clue. Likely combustion equation: 4Al + 3O2 - 2Al2O3 The result on the right is Sapphire. Or sandpaper unless you got it hot enough and cooled it slow enough. That can't be good for exhaust valves. Neither is the 7000 degree flame temperature. I think we can take burning Aluminum off the list of thing that will power GA aircraft. |
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