3 ms·
I'm actually a little curious about how great the practical energy density would be in this case with a 2-stroke engine compared to a modern lithium ion battery
by eigenspace 5y ago
I'm actually a little curious about how great the practical energy density would be in this case with a 2-stroke engine compared to a modern lithium ion battery and motor. 2 stroke engines are pretty famously inefficient, expelling quite a bit of unburned fuel.
That and I'd guess that the engine itself is pretty bulky compared to the electric motor, so the total bulk might even out compared to an electric setup for the same amount of energy, but I'd have to look at the actual numbers.
- photojosh 5y agoI'm wondering what's the smallest possible fossil fuel _generator_ you could make, you could effectively make an ebike "hybrid" and it could be way more efficient since you can just run the engine at optimum speed constantly. Off-the-shelf units are 1000W, but a 200W constant unit would be the best.
- ezconnect 5y agoThis guy made a study: https://www.youtube.com/watch?v=1yB49G756OI https://www.youtube.com/watch?v=1yB49G756OI
- bluGill 5y agoBatteries are still worse. Power to weight of a two cycle is extensive. In ideal conditions a two cycle eninge is more fuel efficient than a four cycle, but you only get about 50 rpm range where this is the case, and you need to be near full throttle. (Read you can prove this in the lab, but not in real world use)