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  1. W

    Idea: How to Search for an Air Compressor

    Aha.....OK, I was in correct to say that an advatage of aluminium SCUBA tanks was less weight. Sorry for that. Although when EMPTY they FLOAT, whereas STTEL ones do NOT tend to float. But it's irrelevant for our application. My main point is that the mechanical properties of aluminium are NOT...
  2. W

    Idea: How to Search for an Air Compressor

    Well, it's not a very constructive comment, and he DOES remind me of the lame brains in high school class. Pretty funny actually, the head lame brain made a smart-ass comment, and the Geograhy teacher, very cool guy, said "Greg (said lmne brain), you know in 10 years time you will be working...
  3. W

    Idea: How to Search for an Air Compressor

    Thanks: good points. i MY case, I have NOT owned a compressor for 15 years. I've NEVER owned my own, but borrowed them, or used one where I work, or study at. So I wanted to get something good. And yes, Abbac seemed OK to me (I'm happy you've found that too). I think they are Italian, but have...
  4. W

    Idea: How to Search for an Air Compressor

    I wouldn't know. Why does it seem like a difficult one for YOU? For me, it was easy: I looked a bit online, including this Forum, and to be honest, nothing really that helpful in narrowing the choice down from the dozens, actually HUNDREDS of compressors available. Sure, there were a few good...
  5. W

    Idea: How to Search for an Air Compressor

    And NEXT, is for a WELDING MACHINE. And THAT is a more complex subject.
  6. W

    Idea: How to Search for an Air Compressor

    OK, so thanks VERY much for all the EXCELLENT comments. They heped me. I'm not trying to sound as if I'm a compressor expert, I was really just trying to describe a way I think is useful to decide what could work. I shall add in the comments that guys have made: - Noise - Reliability -...
  7. W

    Idea: How to Search for an Air Compressor

    Awesome.....am jealous. Err.....Tell me where you live in Crete, please....I have a friend with a big boat....:-}
  8. W

    Idea: How to Search for an Air Compressor

    BTW, what are its details? I can add it to the chart. But it needs its price "normalised", as in was that £350 a 2nd hand price? Because the others are new prices. Obviously at 2nd hand they cost less. But then, maybe pretty worn.
  9. W

    Idea: How to Search for an Air Compressor

    Yeah, good choice. I saw something like it. In fact I think it's just a rebranded Abbac one. It's a belt drive, and I didn't want to go over £250 if i could get what else I needed. It was hard to find lower priced belts to put on. I wonder how loud it's rated at? I saw a YouTube video looking...
  10. W

    Idea: How to Search for an Air Compressor

    Actually, the place I got my data from claims these values ARE indeed FAD. For ALL these machines in my example. But if you have a bit of data for ANY piston pump, you can do a pretty accurate estimate of FAD. You need to estimate a few things, but can do it pretty accurately. The big issue is...
  11. W

    Idea: How to Search for an Air Compressor

    Well, that's basically EXACLY what I did here. (1) Identify important parameters: pressure, supply rate, price, receiver volume (2) Why use an arbitrary "weighting factor" when Mr. Physics is there to help....I'm an engineer, we only use "Arbitrary Weighting Factors" when we need to guess. No...
  12. W

    Idea: How to Search for an Air Compressor

    Hi, Yeah, I was looking at a range of tanks: not all the following are GOOD options though, I'm just showing the possibilities: (1) Scuba tanks: aluminium or steel (2) Conventional gas cylinders; Nitrogen, oxygen, argon, air (3) Fire extinguisher bodies: (4) Propane gas cylinders: I'm a...
  13. W

    Idea: How to Search for an Air Compressor

    Aha, but there's an easy solution. Just buy bigger loudspeakers for your stereo! Is same as if you have a car with annoying grinding or sqealing sounds: turn your radio up. Voila, all that goes away. If leaking oil begins to blur the windscreen, you can add a better degreaser in your wiper...
  14. W

    Idea: How to Search for an Air Compressor

    Yeah, I think the majority of what's sold are pretty crude machines. But £350 is a lot more, and I suspect that was 2nd hand price too, right? And as I said, if less noise is a factor, why not move the MACHINE away from where you WORK? If you do the calcs, you can soon see that you don't need...
  15. W

    Idea: How to Search for an Air Compressor

    Thanks. Yes indeed, I don't really intend it to find the PERFECT machine. I DID consider noise level, and to be honest, I myself would prefer a quiet machine, and would pay extra. But, for a general purpose/home-DIY machine you seem to need to accept what you are given. In any case, I would...
  16. W

    Idea: How to Search for an Air Compressor

    Yeah, good point. Correct me if I'm wrong, but it seems hard to get a reliable/consistent value for FAD. And my feeling is that for a given TYPE (as in direct drive), especiallly for a given manufacturer, then the ratio of CFM/FAD will be pretty constant. Do you have values for FAD for a large...
  17. W

    Idea: How to Search for an Air Compressor

    Yeah, I started out doing that. But then as I said, I wasn't sure what I'd end up needing it for. So this approach is more for trying to get as much as you can, and try not to spend too much $$$. In any case, this way helps you organise a lot of different machines.
  18. W

    Idea: How to Search for an Air Compressor

    Hi there, My first post, and I hope it will be of use. I needed to buy an air compressor for an upcoming project: nothing hard, just needed a mid range DIY type. So do I buy what I need, pay a bit more and get what i need NEXT project, or rent? Sigh. There are a LOT to look at. I decide the...
  19. W

    Hi there,

    I'm a hybrid: one wood leg, one metal leg, and the third is ceramic. I've been a lurker, but am coming out to be able to reply at least. And i've done an interesting analysis on air compressors that I'll post. Hopefully will be of interest. Alan
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