Originally Posted by
AGD
Given the overwhelming support for this idea I am looking at it seriously. I have been running the numbers and it looks possible. I estimate a 4500 psi fill in 30 hours run time but this doesn't take into effect heating losses etc at the moment.
I can estimate the size motor that it would need and while its fairly small, its expensive at about 80 bucks. This means there is no way this would come in around 100 bucks. I think realistically we are in the 200-275 range.
It would be fairly quiet since the motor only rotates at 60 rpm in my current design. It would be designed so it CAN'T pump any more than 4500 psi so you would just turn it off.
Let me know if the price point sinks the ship.
AGD
Since this isn't going to be an "on field" device. why not use a big motor. a 1/8hp 110vac motors are cheap, common, and reliable. They're not small, but they're definitely smaller than a nitro tank. I think the kicker for a project like this would be to have the compressor roughly the same size as a nitro tank. (no need to match the form factor, but something you could stack int the same carrier as a 68ci tank would be magic)
60rpm makes me think you're concerned about pump heating, and piston pump speed. Those cheap 1/8hp motors are usually 3600rpm motors, so you'd need to look at some fun reduction gearing to keep the pump life sane.
is this going to be "par for the course" agd type design? As in most of the parts will be all industry standard size seals?
Now i'm wondering what you're doing for the check valves, given the pump speed, and pump volume those valves are going to need to be pretty small and very close to the pump itself.
In a later post you mentioned that this would come out to be lunch box sized. I think that's a good form factor too. :-) Lots of room to put a logo, and a name on it.
To be an AGD supporter, one cannot be an AGD bigot. -Nero
Truth is a complex thing. One must govern by simplicity. -M. Mercier, special counsel to his Majesty for domestic matters. The Brotherhood of the Wolf
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