I don't want to press the issue Matt, but just a thought: If you mount the turbine in a simple housing that holds it in front and back, possibly with ball bearings or whatever around the inside, and the "fan blades" of the turbine are slightly angled, the air running through them will make it spin while the car is moving. It's pretty low effort/cost.
Since my first pass at addressing this didn't seem to take, I'll try again. Let me try to put it into a context that will make some sense, specifically to you. What if I told you that *I* think you should build another tennant suit. After all, it's just a simple suit, right? It's pretty low effort/cost, as it's just a suit. I mean, what could be so hard about it? You've already made one, so make another. Right??
Prince Neo, just go ahead and build an iron man helmet. It's pretty simple, pretty low effort and cost. After all, everyone else is doing it. What's the big deal??
Does that help?
I can't be more clear about it than I already have. I'm not doing it. I don't want to. I don't want to spend the money and effort to do something I don't want to do.
ANNNNNNNND, you both have NO idea what you're talking about when you say it's low effort and cost. You do not know what the pieces I have in front of me look like, you don't know how they're constructed, you don't know their limitations or how they fit together. You don't know how much free space there is under the hood, etc, etc etc etc.
So what may seem like something that is quick and easy to you, as an armchair quarterbacker who has no context or understanding of the project, my interests, or the limitations of the parts, I can assure you that your assumptions are wrong. It's not easy. It's not cheap.
And i have a million other things to attend to that I actually WANT to do, and that I consider important to the build.
A spinning turbine that nobody will ever see or notice is not one of those things.
sheesh.