chickensevil
Active Member
I don't know... Far be it from me to doubt what elon musk has up his sleeve, but IMHO, there are several reasons why electric powered commercial jets is not practical at this time.
1) In airplanes, weight is paramount. Every pound is scrutinized. And given the energy density of fossil fuels vs. electric, at this point, hauling a huge battery for long distances just doesn't make economic sense for flights. Whatever savings in cost of electricity vs. jet fuel would be swamped by the loss of freight / passenger capacity due to increased weight.
2) Jets have really short turnover time. I believe Southwest turns its flights within 15 minutes at the gate. I don't think you'll be able to re-charge a plane's battery within 15 minutes. Every extra minute spent at the gate is hugely expensive and would again swamp any savings in fuel efficiency. And battery swap would be a huge deal given the expected size of the battery, likely requiring a larger crew than current refueling crews, again washing out any savings.
3) The process of certifying a battery to meet the safety standards of international flight is long, expensive, and fraught with difficulty. Witness Boeing's troubles with a much smaller, less critical battery in its 787. Think those tesla fires were unfairly damaging to the company? In the 787, a few battery fires and the FAA grounded the entire fleet! I'm not sure why Tesla would want to tackle something like that when there are so many other low-hanging fruit it could pursue right now (grid storage, pickup trucks, delivery trucks, etc.)
4) Annual revenue for commercial jet manufacturing is dwarfed by annual revenue for automobiles. Why go after a much smaller, more difficult market when there's still plenty of automobile market to chase?
There is a lot of information out there detailing that the primary cost of your airfare is the jet fuel. They have to put a LOT in there, and it isn't cheap. It would be smart to start with airplanes that are smaller already and only make short regional jumps (say DC to New York in distance)
It was mentioned by someone else by the recharge time is going down, and since you can hit a 2C recharge rate a larger battery does not mean a longer recharge time. If you can get enough electricity going into the battery, you will have a recharge time of around 1 hour to 75 minutes. If you could then design a hot swap system, you would have the quick refuel time and not need a large stockpile of batteries. I assume though that they won't go that route until they can just straight get recharge time down to 10-15 minutes.
You know, if a fuel station was something that was brand new today it would NEVER get passed as "safe". We want you to take this nozzle from a tank full of explosive chemicals, and pour it into another tank, all the while being sure not to get too close and inhale these liquids and ensuring that you are extra careful not to cause electric shock or otherwise accidentally ignite the liquid/gas. You want to talk about safety?
that might be true, but boeing still seems to be getting by.