InsidiousTechnique t1_ja6gtqn wrote on February 27, 2023 at 4:49 AM

Reply to comment by jaa101 in ELI5: Why does farming equipment require such low horsepower compared to your average car? by thetravelingsong

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.thescipub.com/pdf/ajabssp.2010.247.255.pdf&ved=2ahUKEwjLocOc8rT9AhWXlIkEHfzuBN4QFnoECBUQAQ&usg=AOvVaw3A1t4DfoJgCQDmG8Etdlju

So I read the paper, and saw it did assert that. But here's another paper (that looks more researched) that has draft force compared to speed, and there's definitely not a squared relation there although it does show an increase on draft force compared to speed it appears more linear.

jaa101 t1_ja6iqeq wrote on February 27, 2023 at 5:08 AM

Looks like you're right, in fact it shows closer to a power of 0.33 than 1, and far from 2. Neither document goes into the physics involved.