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From the article: Even though it looks tiny and so lightweight (it’s made of aluminum), it can easily carry 120kg and you can travel at max speed of 10 kmph fo

From the article: Even though it looks tiny and so lightweight (it’s made of aluminum), it can easily carry 120kg and you can travel at max speed of 10 kmph for at least 12 km. After that you’ll probably need a re-charge, and apparently it’ll take 3 hours for that. Essentially, you're saying they are flat-out lying. Could be, of course. But that's quite a claim.

ChuckMcM 11y ago
I was just working backwards from the physics, one of the things I've done in the past if build battlebots, and one of the interesting thing about those machines, typically ~100kg weight limit, is figuring out how long you can run them so they will last 5 minutes in the ring but you aren't carrying any extra weight in batteries. So from the article you have two things, you have 10mph for 12km (that is 1.2 hours of driving) and a recharge time of 90 minutes (1.5hrs) Batteries charge at a rate called 'C' (their capacity) so a battery that charges at 2C means that it can charge (accept current) twice as fast as its rated capacity. They need at least 500W (2/3hp approximately) to move a vertical human at 10kph. And they do that for 1.2 hours? so 600Watt-hours. Assuming your battery is driving brushless motors with a 48V working voltage that is 12.5 Amp hours net, so at 85% efficiency (good batteries) that is a 15 amp-hour, 48V battery. (or four 12V 15Ah batteries wired in series). So yeah, the physics doesn't work for me on their specs. I would love to learn how the do that differently and get that much energy into such a small and light package. That would help me make a more competitive battle bot (lots of energy left over for weapons like spinners and what not.)
- Jedd 11y ago
  > So from the article you have two things, you have 10mph for 12km > (that is 1.2 hours of driving) and a recharge time of 90 minutes Were we reading the same article? 10 km/hr for at least 12 km. Recharge time of around 3 hours.

ChuckMcM 11y ago

I was just working backwards from the physics, one of the things I've done in the past if build battlebots, and one of the interesting thing about those machines, typically ~100kg weight limit, is figuring out how long you can run them so they will last 5 minutes in the ring but you aren't carrying any extra weight in batteries. So from the article you have two things, you have 10mph for 12km (that is 1.2 hours of driving) and a recharge time of 90 minutes (1.5hrs) Batteries charge at a rate called 'C' (their capacity) so a battery that charges at 2C means that it can charge (accept current) twice as fast as its rated capacity. They need at least 500W (2/3hp approximately) to move a vertical human at 10kph. And they do that for 1.2 hours? so 600Watt-hours. Assuming your battery is driving brushless motors with a 48V working voltage that is 12.5 Amp hours net, so at 85% efficiency (good batteries) that is a 15 amp-hour, 48V battery. (or four 12V 15Ah batteries wired in series). So yeah, the physics doesn't work for me on their specs. I would love to learn how the do that differently and get that much energy into such a small and light package. That would help me make a more competitive battle bot (lots of energy left over for weapons like spinners and what not.)

Jedd 11y ago
> So from the article you have two things, you have 10mph for 12km > (that is 1.2 hours of driving) and a recharge time of 90 minutes Were we reading the same article? 10 km/hr for at least 12 km. Recharge time of around 3 hours.