qev vs piston
- jackssmirkingrevenge
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A QEV is a commercially manufactured piston valve, so if you want to fork out a bit more and save yourself some work, go for a it
hectmarr wrote:You have to make many weapons, because this field is long and short life
- POLAND_SPUD
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keep in mind that making a piston valve costs money too...
so don't listen to people who say that piston valves are better because they cost nothing...
you have to buy all the parts and building takes some time... what is more, qevs simply have better performance than homemade piston valves... so all in all it is better to use QEVs... (unless you need a large porting valve (bigger than 3/4") if that is the case it's much cheaper/better to build your own piston valve)
spend some time searching for places selling QEVs you can find shops that sell them really cheap
so don't listen to people who say that piston valves are better because they cost nothing...
you have to buy all the parts and building takes some time... what is more, qevs simply have better performance than homemade piston valves... so all in all it is better to use QEVs... (unless you need a large porting valve (bigger than 3/4") if that is the case it's much cheaper/better to build your own piston valve)
spend some time searching for places selling QEVs you can find shops that sell them really cheap
Children are the future
unless we stop them now
unless we stop them now
- jackssmirkingrevenge
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That's a bit of a sweeping generalisation. I can make an epoxy piston for a tiny fraction of the cost of a QEV with a performance that's just as good, however for someone not willing to invest the time and effort in materials etc. then a QEV is a perfectly acceptable choice for what is not really that much money.POLAND_SPUD wrote:keep in mind that making a piston valve costs money too...
so don't listen to people who say that piston valves are better because they cost nothing...
you have to buy all the parts and building takes some time... what is more, qevs simply have better performance than homemade piston valves... so all in all it is better to use QEVs...
Also, if you're working on something more complex than a single-shot launcher, having a ready-made QEV will leave you more capacity to dedicate attention to more challenging parts.
hectmarr wrote:You have to make many weapons, because this field is long and short life
- POLAND_SPUD
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LOL JSR not everyone is an epoxy god like you.... epoxy costs quite a lot plus you have to know how to use it (which means you first have to spend some $ and practise using it)....That's a bit of a sweeping generalisation. I can make an epoxy piston for a tiny fraction of the cost of a QEV with a performance that's just as good, however for someone not willing to invest the time and effort in materials etc. then a QEV is a perfectly acceptable choice for what is not really that much money.
overall I agree with your reasoning - in some circumstances and for some of us it might be cheaper to make your own piston valve but not much... sometimes it's better to spend that 5-10$ more and buy a product that does perfectly what it is supposed to do
Children are the future
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unless we stop them now
- jackssmirkingrevenge
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The thing with epoxy is most people look at the unit cost per container, ignoring the fact that the actual amount you use per project is very little.POLAND_SPUD wrote:epoxy costs quite a lot plus you have to know how to use it (which means you first have to spend some $ and practise using it)...
I remember paying around $100 for 4.5 kilos a few years ago, a typical mini-piston airsoft calibre launcher (piston + endcaps) doesn't use more than 30 grams of epoxy, that works out at just 66 cents!
You have point though that until you get used to working the material, there might be some waste on the way useful to note though that epoxy fragments from unwanted projects make an excellent filler when broken up and added to an epoxy mix.
hectmarr wrote:You have to make many weapons, because this field is long and short life
okay... I cant vote yet due to the fact of my just having joined, but in your case - that of an airsoft gun - a QEV would be better, because your chamber probably has a small diameter. but I like piston valves for the big guns but in your case i would vote for QEV
- MaxuS the 2nd
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You're being a bit general there.
Yes, you have a 9oz tank at 270psi with a Brakeline barrel.
But that's like saying:
I got a car,
It's got 4 wheels
It weighs 1500kg..
How fast will it go?
Yes, you have a 9oz tank at 270psi with a Brakeline barrel.
But that's like saying:
I got a car,
It's got 4 wheels
It weighs 1500kg..
How fast will it go?
Badman
I personally like mcmaster- Carr, its a bit overwhelming when you first go on it but it is really a great source of parts, luckily for me I know the people that run my local hardware store so they can get me stuff cheap, so other than mcmaster I cant help you.
edit: about the brake line, they are actually a little bit to big, but still work well. but if you really want a good looking high performance barrel invest in a length of 6mm copper its great, expensive - at least in Australia- but great
edit: about the brake line, they are actually a little bit to big, but still work well. but if you really want a good looking high performance barrel invest in a length of 6mm copper its great, expensive - at least in Australia- but great
what about in america any good barrels for a cheap hard to bend barrels that about a yard long is this a good barrel length for a sniper??
also any good free design programs to design my rifle on???ive been usen paint really bad
also any good free design programs to design my rifle on???ive been usen paint really bad
- Gippeto
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What kind of "good free design program" did you have in mind?
GGDT is free, and in my opinion, it's a great tool to have.
http://www.thehalls-in-bfe.com/GGDT
Or, are you looking for CAD software?
Just google "free cad"(without the quotes of course). There are many to choose from.
And please,..try using the spell check button.
GGDT is free, and in my opinion, it's a great tool to have.
http://www.thehalls-in-bfe.com/GGDT
Or, are you looking for CAD software?
Just google "free cad"(without the quotes of course). There are many to choose from.
And please,..try using the spell check button.