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The voltage droop isn't as bad as you'd think, I don't get limited power until I'm below 10% in our Tesla 85D. Even "full throttle" for most electric motors isn
by vvanders 10y ago
The voltage droop isn't as bad as you'd think, I don't get limited power until I'm below 10% in our Tesla 85D. Even "full throttle" for most electric motors isn't near the max C rating(because amps = heat = power loss).
The rest of the stuff thought, yeah that's an issue and I feel like one of the areas where Fuel Cells might actually be applicable(you don't have the long-term leakage/storage/fueling issues as with cars).
- paulmd 10y agoAn aircraft can't afford to be hauling around 2-3x as much battery as is actually necessary to fly, as is common in electric cars. I can assure you than when an electric airplane is at the limit of its range, its performance characteristics will change in a negative way. Electric planes are already at a 100x disadvantage in terms of Specific Energy - liquid fuels (JP-1 jet fuel or gasoline) contain about 46 MJ/kg while Li-ion batteries contain about 0.36-0.875 MJ/kg. They cannot afford to make that a 300x disadvantage. It doesn't work in terms of lift. As someone else posted in a thread, electric power already takes you from a 900 mile range to a 150 mile range. 50 miles is not acceptable because you're talking <30 minutes of endurance including takeoff, and you have zero safety margin if something should go wrong.