Oh, the batteries will charge. But most generators are under 90% efficient. Then a converter from generator voltage to battery pack voltage you’ll lose another 5-10 percent. Mechanical losses (transfering wind to rotational torque) is another 5-10 percent. Now, the charge capacity of a battery, you lose another few percent. Now you have yourself losing at least 25-30 percent. So thats 70% efficient, and thats IDEAL.
What do you think the effective KWH generating capacity of that system is? Multiply that by 70% and Compare that to what the vehicle needs to drive WITH the extra drag? I bet you its almost negligable.
It will charge the batteries, but I doubt you’ll get more than an amp out of a wind generator even if its the most efficient one you can get. You MIGHT get an extra 1/4 mile, but not enough to matter, especially when you’re using hundreds of amps.
If its such a good idea, why isn’t everyone doing it? Because its NOT lossless. Its a LOSSY system. The drag from the propeller/fan assembly is enough to KEEP you from going an extra 1/4 mile.
Physically its not possible. Wind resistance will likely take away any and all gain you would get from the wind powered generator. Its not like you’re going to be pushing amps and amps, its likely only a couple, if that.
Do this for us:
Find a generator that can output the amperage you need (10-20A)
Tell me how bit that generator is
Tell me how much torque it takes to get the rotor moving from a stop to full RPM to produce max amps.
Tell me how large of a fan you need to create that torque on the rotor
calculate the wind resistance of the generator/propeller assembly
Then you calculate Drag
Then you calculate how fast you need to go to produce enough current to charge the batteries. (I bet its quite a bit)
Then you calculate the drag of the bike to see what it needs to be pushed to that speed
Then add the weight and drag of the generator/prop to see what it needs at that speed
Compare the two, subtract, thats the extra capacity you need from the batteries to push along the extra weight and drag.
Then calculate the current you CAN generate, and how much current you NEED and I bet you get a negative number. I bet you’ll find out, that physics rules, and has shot many people down with this same idea.
So if you want to argue some more, go ahead, PROVE IT! You prove it physically and let me know what you find. In fact, I’ll have it published in every technical, engineering and physics magazine out there.
Oh, and I’ve got a bridge to sell you too…