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by darth_avocado
44 days ago
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Well arguing load isn’t a factor and the real limitation is the volume is still wrong. EVs aren’t infinite in size and real world constraints exist. At the end of the day, your semi cannot be 90% battery and ferry only a pallet of chips. Total energy spent on moving an object by a distance is still proportional to the mass of the object. So if you’re absolutely spending more energy hauling 10000lbs vs 100lbs. The only point where the cargo is relatively immaterial to the range is when it is a very small percentage of the actual weight of the vehicle. But that doesn’t mean the vehicle is efficient. It’s just that now you’re spending more energy hauling the battery itself than the cargo. Energy density matters in semis because companies want to spend less money hauling the battery itself than the cargo to make it viable. Rivian an electric car company admits that towing will reduce your range. There’s a reason for that. https://rivian.com/support/article/how-does-towing-affect-ra... |
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It is not. The energy spent to change momentum is proportional to mass. For mass to affect momentum you need a second order effect linking it to increased system losses e.g. a heavier plane needs more lift, which requires higher speeds, higher angle of attack, larger lifting surfaces, …, all of which increase drag, which is the primary way planes lose energy.
> Rivian an electric car company admits that towing will reduce your range. There’s a reason for that.
The reason is the increased resistances (air and rolling) from the trailer: https://youtu.be/UmKf8smvGsA