3 ms·
Neglecting the weight of the engine / motor itself, the energy density of jet fuel is about 46 MJ/kg, and with batteries you can only get to about 1.5MJ/kg. Mob
by ohadron 13y ago
Neglecting the weight of the engine / motor itself, the energy density of jet fuel is about 46 MJ/kg, and with batteries you can only get to about 1.5MJ/kg. Mobile phone batteries are about 0.5MJ/kg.
So thats at least 30 times more weight than is required with jet fuel.
Electricity is probably not it.
- mfenniak 13y agoIt's actually worse than this when you consider that aircraft become more fuel efficient the longer they fly, because they're not carrying around the fuel they've already burnt. An electric aircraft would presumably have a constant weight (stuff + batteries).