Quote:
Originally Posted by Kevin Sevcik
First off, if you're using the 100C like I think you should be, it has a 9 minutes per 60 duty cycle.
If you need LOTS of air, I think an onboard 350C IG makes sense. It weighs as much as 2 gallons of storage using the standard plastic tanks. 2 gallons of storage at 120 psi gets you 2 gallons of air to use at 60psi. If you're putting air back in at 100 psi, you're putting in .6 SCFM, which in 2 minutes gives you 9 gallons of air at 14.7 psi, or 2.2 gallons at 60 psi. So if you're constantly using air such that you need more than 2 gallons of it per match, you can increase the density of your storage by putting a 350C-IG onboard. If you're using less than 2 gallons per match, you'd be better leaving the 350C-IG offboard unless you can't find room for storage. Which I think means that the 350C-IG offboard is the correct solution for almost all robots unless you can't find room for enough storage.
EDIT: The 350C-IG has a 0.08 SCFM at 100psi advantage over the 100C. That's 0.3 gallons of air at 60psi in a 2 minute match. For a 5 pound penalty. You can make that up with 2 tanks for a 1.2 pound penalty. So, really, the only reason to use the 350C-IG onboard is if you don't have room for 2 more 36 cu.in. tanks. The 100C can fill 4.5 gallons from 0 to 120 psi in its 9 min per 60. So call that 2.25 gallons every match, since 30 min per match is worst case-ish. And that's assuming you're draining the tanks every match. So yeah, I think the 100C is the weight/performance tradeoff winner unless you're using absolutely massive amounts of air per match and really need that 100% duty cycle or you really don't care about wasting weight and power, since the 350IG has a slightly higher current draw.
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You kind of lost me with the calculations. How does 0.08 CFM difference at 100PSI over 2 minutes equates to to 0.3 gallons of air at 60PSI?
By my calculations it's almost 1 gallon (0.97)
But in any case, I think mentally I was still comparing it to old 90C compressor. Looking at stats again, 100C does look a lot more impressive.