3 ms·
An important point EV advocates often gloss over is that you don't get to burn battery. In aviation, especiaslly, this really matters - over half an aircraft's
by TylerE 3y ago
An important point EV advocates often gloss over is that you don't get to burn battery. In aviation, especiaslly, this really matters - over half an aircraft's weight at takeout is often fuel. The later in the flight it is, the more fuel has burned off, the lighter the plane is, and the more efficient the rest of the flight will be. You have to lug that empty battery around at full weight.
- wilg 3y agoTechnically the battery gets a teeny bit lighter because of E=mc².
- anyoneamous 3y agoOver long journeys, those 3 nanograms really add up.
- fragmede 3y agohttps://physics.stackexchange.com/questions/34421/does-the-mass-of-a-battery-change-when-charged-discharged https://physics.stackexchange.com/questions/34421/does-the-m... It's about a microgram.
- hermitdev 3y agoSo, in other words, you gained more mass from bugs splating on the windshield than you lost in the battery.
- deleted 3y ago[deleted]
- jacquesm 3y agoThe simple sum is to use half the weight of the fuel as though you have it with you all the time. That's not quite accurate but close enough.
- tpurves 3y agoWell now you've just made me an engineering scenario of aircraft equiped with drop tanks full of heavy batteries used to extend range. Drop tanks that they let go mid flight 'bombs away!' as they discharge.
- harpiaharpyja 3y agoSo all we need then is parachutes, some kind of GPS based glide guidance control, and a network of aviation battery collection stations :) I guess overseas flights will just have to absorb the cost, unless it happens to be economical somehow to operate floating stations for the purpose of collecting dropped batteries.
- stetrain 3y agoRocket Lab's Electron rocket actually does this with the batteries that power its electric turbo pumps. > The electric pumps are powered by lithium-polymer batteries. The second stage uses three batteries which are "hot swapped", two of the batteries are jettisoned once depleted to shed mass. https://en.wikipedia.org/wiki/Rocket_Lab_Electron https://en.wikipedia.org/wiki/Rocket_Lab_Electron
- justahuman74 3y agoAnother interesting dynamic is that mid-air refueling is possible (though rare), where as for batteries that's impractical with current tech