I’ve probably asked too many questions in this forum about compressors, but I guess it’s helpful for others so they don’t have to ask too. I’ve mentioned before I want to setup a horn ‘rig.’ Actually going out in the woods and doing lengthy recordings, which is why I got this. It being on clearance was probably the biggest driving factor though.
It puts out a whopping 26.9cfm at 175psi, which would essentially allow me to keep up with anything on a 20 gallon tank for nearly two minutes, except for the mighty M5 of course. While I was able to get quite far with research on horn air consumption, I’m stumped on the motor part. I’ve figured a run of the mill cheap 420cc gas motor could get me 25.2cfm at 175psi. That’s still decent, but I’ve been second guessing using gas because I also want to use this as a shop compressor, and it would be nice to have something a bit quieter than gas. It seems anything involving those 230 volt electric motors is out of the question. I’ve heard about winch motors being used on York’s, and based on random calculations, winch motors seem to have about 75% efficiency of an AC induction motor at higher rpm’s being DC and brushed. It seems most winch motors can run on 24 volts, which would be the plan. Using two 12 volt deep cycle batteries to run the compressor for a significantly greater period of time down to around 12 volts. I’d use two 6hp winch motors to drive it, which at 75% efficiency of an AC induction motor, should give me an equivalent of 9 AC horsepower.
The question I have is, would it be worth it? I’m not sure if brushed DC motors are really built for heavy duty usage like running a two stage compressor for a 40 minute period over 4-5 hours a few times a month. Trying to be realistic rather than optimistic, I’d imagine I’d toast the motors within a month or so requiring a full rebuild (mostly because of the brushes). Then again, I’ve never operated a winch motor before so perhaps I’m underestimating their abilities. My goal is to run a portable car and garage setup on electric power. I can see how this is probably out of reach though without spending some extra big bucks.
Dan, I sent you a personal message about this, but I figured nobody really checks their messages anymore on here. I’m not the best at it myself.