Engineering

Further thoughts on energy density:
- Jet Fuel energy density: ~12,000 Wh/kg 
- Batteries energy density: ~500 Wh/kg 
- Electric Motors efficiency: ~85-90%
- Jet engine efficiency ~30-40% 

So batteries at 1,000-2,000 Wh/kg starts to be competitive with Jet Fuel, and would really start to surpass it at 5000 Wh/kg

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Any idea what the energy density of nanoelectrofluids are? Would probably be good for rapid refueling of aircraft

I've always wondered this. Does it matter what kind of jet fuel? Like some of them airlines are doing biofuels, what kind of watt hours difference is seen from those?

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It’s from an article pushing SAF (sustainable aviation fuel) so I was extrapolating further I was thinking what it would take to get to electric air travel being fully viable without hybrid systems and what the energy density of batteries would have to be to make that happen

Are they alluding to the viability of electric air travel or simply making an abstract comparison of energy densities?

fuels cells or possibly direct hydrogen turbines seem like a possible way forward as well, since hydrogen is between 30,000-40,000 Wh/kg depending on the source you use

though the energy density by volume isn't quite as good because the compressed gas isn't liquid

When do you think it could be possible?
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