I have a bit of a dilemma. A minor one, really. But it's something that I've been thinking about a lot lately. As many of you know, I come up with some hare-brained ideas sometimes, but they're fun to explore, so how 'bout this one.
On my project truck, I'm putting the motor behind the cab. To gain sufficient airflow across the radiator, I want to go ahead and put the it up front. Unfortunately, this leaves quite a distance between the motor and the radiator. Plumbing isn't an issue, but moving air while at a standstill is. So, the obvious solution is to use an electric fan. I HATE ELECTRIC FAN NOISE ON OLD VEHICLES! It just seems so out of place.
So, I had thought about a jackshaft, but that would have to be balanced and fairly stiff (think driveshaft) to cover that distance. Jackshaft is out.
Next idea - hydraulic motor. Seems simple enough. Plumb it into the power steering and as long as the motor's running, so is the motor, and so is the fan.
New idea, that seems perfect - hydraulic motor powered by water. This seems great at a couple of levels. First, the water is already there. Except that I don't think it'd be efficient enough, I could just take a water pump and run the water through it. So, the motor would have to be more efficient at turning the flowing water's energy into rotational energy to drive the fan. Second plus, the motor only does work when it's really needed. Well, that's not entirely true. It will turn the fan whenever the water is flowing, so it will be spinning even when going down the road, but then again, so is every other mechanically driven fan. Here's the cool (no pun intended) part. If the vehicle is sitting still, and the water isn't yet warm, so the thermostat isn't open yet, there's no water flowing. No water flow -> no rotation!
It's just a fart in the wind, but has anybody thought of this? And more importantly, how practical would it be to implement on my truck?
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