I'm not an expert in this field, but I was also interested... A google search gave me this -- maybe you'll find it interesting, as well:
It doesn't look to me based on that information that 50% is a reasonable assumption for the use case here, even at 20+ft of hose, given the small diameter? Maybe I'm interpreting this wrong... admittedly not going to do the actual math
(not an expert) I agree, it didn't seem even close to that scale.It doesn't look to me based on that information that 50% is a reasonable assumption for the use case here, even at 20+ft of hose, given the small diameter? Maybe I'm interpreting this wrong... admittedly not going to do the actual math
Best I've gotten so far was 1.2KW/hr with the 120V charger. About 20 miles added over night. Pathetic obviously. I get my 240V/60A charger installed today/tomorrow and very much looking forward to it.
Observationally for this system it's easily more than a 10% drop. When the tire you're filling is 40psi, the setpoint needs to be over 50 psi to allow it to put more than a pulse worth of air into the tire. If you are trying to fill something to 10 PSI the setpoint will likely have to be so high to be potentially unsafe if it doesn't act like expected.It doesn't look to me based on that information that 50% is a reasonable assumption for the use case here, even at 20+ft of hose, given the small diameter? Maybe I'm interpreting this wrong... admittedly not going to do the actual math
Honestly this probably explains why I assumed my compressor was broken. When I had to put the spare on the pressure in the spare was 4-5 psi low. Having a similar compressor from Dewalt that you just set to the set pressure and it does the job I assumed the R1T should be the same.
That's flow rate, not pressure, which is largely irrelevant to measuring pressure - if the compressor is off, measured pressure at each end of a 20' pneumatic hose will be within a couple PSI of each other (eventually converging given enough time to reach equilibrium). Using flow rate to govern fill times is not ideal, because the volume needed to reach spec'd pressure has to be calculated from starting pressure, desired end pressure, atmospheric pressure, ambient temperature, and calculated (or measured) flow rate. It's much simpler (and cheaper, and more reliable) to program the controller to "run compressor X seconds, stop compressor, measure pressure, run compressor X seconds if <Y pressure, repeat until Y pressure" but as I mentioned earlier the time it takes to stop and measure adds up for longer fills. Rivian's implementation of "run compressor, measure constantly, stop at X pressure" is likely the best option for this use case, provided operators are able to account for the offset between measured impulse and desired static pressures and set the pressure limit accordingly.
This is only true if you're able to measure close to the final container you're filling and have the majority of your restriction upstream of your measurement.
I'm hoping I have some time soon to tear that stuff down. Wouldn't be upset if someone did it before me though. It seemed pretty quick to add a couple PSI into a tire on my Hummer but I did spend most of my time trying to figure out why setting it to 45 PSI meant it only ran for a second or two at most when the tire was at 39 psi starting off. I think I had the setpoint up to 53 psi and it was still shutting off before the tire was at 45 psi. I was in a hurry to do other stuff so I didn't keep playing with it.
1) Their are 12V outlets under the center display and in the front truck.
Also a 12V DC outlet in the gear tunnel (as well as a 120V AC outlet)
If you really want one, hard wire it. Why spend so much on a vehicle to have a coiled wire running across your dash?
