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llocust

11/20/09 5:14 PM

#17675 RE: Torvecian #17674

Since it's a CV joint they're testing,
300 RPM could be upwards of 30 MPH depending on the outer diameter of the tire. I doubt a 25 ton mining vehicle gets going much faster than that.

750 lb ft of torque sounds like a pretty good load to me.

--Background math to show work: 36" diameter tire has 9.5 ft circumference (3 ft * pi). At 300 RPM it travels 2850 feet per minute, or about 32.4 MPH--
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allnumbers

11/20/09 6:17 PM

#17676 RE: Torvecian #17674

There is no misinterpreting of the testing plan...

Torvec is testing with a 30 HP electric motor that will simulate the load required for a 25 ton mining vehicle.

All of that is fine.

I still think that the test will be quite successful and be similar to a slam-dunk.

Why exactly is it then, that mining companies don’t put 30 HP motors in the 25 ton mining vehicles?

If the testing is not successful; only then will we have a problem.

Of course if that were ever to happen, it is not likely that word of that will ever be heard.