so you can ride at night
Dave@lemmy.nz 2 weeks ago
Sorry can someone explain how the turbines work? Is the turbine pulling the motorbike forward or is it there to generate power?
The bike has an electric motor so the turbine seems unnecessary. But if the motor is pulling it forward then it’s fighting the turbine so it’s wasting energy (it’s not some perpetual motion device).
Are the solar and turbines there so you park up and the bike charges while you’re shopping?
I just can’t understand why the addition of turbines is helpful here.
NaibofTabr@infosec.pub 2 weeks ago
Dave@lemmy.nz 2 weeks ago
But it doesn’t help. If you are travelling forward under the force of the motor using the electricity, then using the wind from that forward motion to generate electricity with the turbine will produce less electricity than the extra energy needed to propel you forward when you have a turbine on the top creating air resistance. If you could use a motor to travel forward and use a wind turbine to capture energy from that motion in a way that produces more power than you put in, well that would be a source of infinite energy. It violates the law of conservation of energy.
The only thing I can think of is that it generates electricity when you are not moving. But considering the size of it, I can’t imagine it’s worth it to generate that tiny amount of electricity when stopped to then have that increased drag when moving causing you to use more power.
Swedneck@discuss.tchncs.de 2 weeks ago
you can actually gain energy while moving upwind, it’s counterintuitive but the existence of tacking in sailing (doing a zig-zag upwind) makes it a bit easier to internalize for me.
www.youtube.com/watch?v=u5InZ6iknUM
Dave@lemmy.nz 2 weeks ago
That’s a little bit different.
In your case, the wind is blowing and the craft is getting energy from it.
I was referring to the energy coming from the motor pushing you through the air and then trying to claim some energy from the wind you created by pushing yourself through the air with the motor.
If there is wind blowing you could in theory get some energy from it, but the thing about sailboats is there is a constant need to adjust the sail when you turn. A turbine on the front isn’t going to be angled correctly whichever direction you turn.
But I think I worked out the reason for the turbine. It’s powered by the battery (it’s not intended to charge the battery) and I think is there to pull the top of the contraption forward so it doesn’t fall over when accelerating.