Quote:
Originally Posted by freebeard
Are you saying that to make me feel better? I got multiple results and had no way to choose between them. maybe they made the same mistake. 37 and 35MPH are pretty close.
IIRC there's nothing in the gear-train that would freewheel. Even with no power, one would think there'd be eddy currents and/or back EMF.
I may consider using it for a generator in a micro-hydro installation. Put a sprocket on each hub and attach both to a jackshaft.
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Nope, I honestly made the same mistake twice. I included my work so it could be checked. If I made any errors, I want to know. The only difference I can see is I didn't round my numbers. I suppose that could account for the 2 MPH difference. I had to take a break and come back to it. My wife was wondering what was wrong with me!
You mentioned, "Maybe they made the same mistake." Very possible, especially if they aren't the ones who normally do it. As I recall, you said the owner was out of town. I'd bet they did screw up. Have you considered bench testing it to see if it is indeed limited to 35 MPH?
As for my "free-wheel" comment, I misspoke. Toyota/Lexus would probably make use of any eddy currents and/or back EMF to charge the traction battery instead of letting it go to waste.