Thanks guys!
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Originally Posted by ill steez
...and what are the details on the motor?
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It's an 11"(dia), DC, General Electric motor from a Hyster forklift. Stock so far, but eventually it will get a full race build. A lot of times the biggest part of that is just re-wrapping the coils with higher temp insulation, and going over the rest of the motor with a fine-toothed comb. The wrapped coils get coated with epoxy and baked, brushes are upgraded, etc. It's pretty amazing that a slightly reworked forklift motor is capable of the performance it is.
I'm going much further. I'm eventually having the coils custom wound, and a couple other tricks inside. Rewinding the coils is like grinding a custom cam in a gas engine. You can put the powerband where you need it. The thing is, I need to do some testing in near stock configuration to develop a powertrain baseline and gauge vehicle dynamics. With enough information, I can tell the guy what I want the motor to do and he'll design the internals - another will do the custom winding and rebuild the motor.
Quote:
Originally Posted by ill steez
...so what kind of acoustic tricks did you have in mind??...
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In a nutshell, to really push a DC electric motor you have to provide external forced air cooling. I'm doing the CAD model now for a blower that will push around 500cfm at 190+ mph (more air speed and volume than pressure). I am modeling the case to lightly resemble an old Frenzel supercharger. It will be mounted directly to the motor case, be driven by the motor, and blow directly into the cooling ports. The combination of the huge blower running with the accelerator pedal, sucking and pushing large volumes of air, and its thin aluminum case resonating the internal sounds of the motor, are what I am working with. I have to determine the frequencies of as many of those sounds as possible, and tune the enclosure to amplify some, cancel some...
The intake side of the forced-air system will have three spun metal velocity stacks, for a retro touch, and these will also serve as megaphones to amplify the good stuff. Hope all that makes sense.
