|Dec 26, 2012, 04:20 AM|
Denmark, Region Zealand, Roskilde
Joined Oct 2012
It really all comes down to capacity per weight unit.
Good LIPO's are just above 150 Wh/kg, and I think the super/ultra capacitors currently on the market are around 5.5 Wh/kg.
The coming Lithium Sulfide rechargeable batteries will hold around 450 Wh/kg - Yes, that's tripling modern battery packs' capacity
My guess is, these kind of cells will hit the market in a year or two..
But compare it to gasoline, which holds around 12200 Wh/kg, or Liquid Hydrogen: 39000 Wh/kg (without container, valves and engine/fuel cell).
I still like the idea of burning some kind of fuel, as it decreases the flight weight while used. Preferably in a fuel cell, since they have the greatest efficiency. But the technology just isn't there yet, the numbers still don't add up right...
|Dec 26, 2012, 09:30 AM|
Good data Mr Dane...
History has taught me, that is there is a demand for something, someone will figure out how to make it work… There is a huge demand for better batteries, no question… for full size cars, cell phones, laptops…. Ect… Its only a matter of time before 45-60 min flights are common. I would rather HD video to fly FPV… because 17 min is long enough for my flights…
|Dec 26, 2012, 02:47 PM|
From what I've read, I assumed the next big jump in Lithium energy density would be Li-air or Li-O2 technology. Even the suggestion Wh/kg would compare to liquid fuels. Add to this the possibility of carrying capsules of 100% O2 to be analogous to nitrous used in top fuel racing systems.
I understand a real-world application of the tech is formidable, but it sounds as if it would be a grand game changer if it could be made practical.
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