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Hey i just got my self a airbrush and compressor along with it.
but at the moment my airtube from the compressor to the airbrush gun is kinda to long at the moment.
The Compressor the air capacity is 23l / min and the working pressure is 4 bar a dual action cheap one from a swedish store called jula or biltema 17-372 i think the airbrush is called but not sure.
Anyways, since the airtube is to long at the moment and i dont want to cut it off and it will be to short. Couse of that i'll ask you guys, if the airtube is to long i guess you dont get as good effect or outcome
so is there any good measure that you could tell me for the airtube to be?


and since you're already here
could you give me any good sites or adress to any homepage that showing good practice steps, that will improve my painting on miniatures of course
having no plans on making canvas paintings

First thing. Welcome to Dakka,

You are new here so I won't berate you too much for not using the search function....

Here is your basics - From the owner of Badger Airbrush.




As to your compressor. Well not sure about bars and all that. Most compressors are measured in PSI (pounds per square inch) for a gravity fed airbrush with properly thinned paints you will tend to spray any where from 10-20psi (depending on what your doing, needle size etc. To hose length. I have a 6 foot hose and it works well. I have a moister trap at the compressor side and have not noticed an issue that would make me want to get an inline filter.

As far as techneques in using an airbrush I would recommend watching 2 people.

Les from Awesome Paint Job
https://www.youtube.com/channel/UC0vYyCks8CDWZBHz-qtZhbA

Andrew from Schnauzerfaceminis
https://www.youtube.com/channel/UCPtFEqSumWcgmmLsF6cyFhA

I use a ten foot hose. Barring any leaks or kinks, though, too long shouldn't be as much of an issue as too short, especially considering the output of your compressor (4 bar is a bit under 60PSI and 23L is roughly .8CFM - both are plenty for an airbrush).

Some people with large compressors run air lines through their house, allowing them to run the louder compressors in a garage or basement while they spray in another room. You just need to raise the compressor-side pressure to the highest level you'll use and add an inline pressure regulator closer to the gun so you can drop it when you need to - gives you your full working range without having to run across the house whenever you need to tweak the pressure. If the compressor is next to you, you can either cut the hose to whatever length you think you'll need or leave it be, simply coiling up the excess. It will run a little longer on start up, since it needs to pressurize more hose, but once it's running, it should behave just fine.

Yeah, the length is really not a problem when it comes to flow and pressure.

Just out of curiosity, what do you consider too long?

At work, we have a car-sized compressor in a warehouse that provides air to rooms a few hundred feet away on other floors, so distance is definitely not an issue, as long as you don't have a leak.

What you want, though, if you have more than 15' or so, is a second regulator and moisture trap closer to your airbrush. As long as you can consistently supply more air to the last regulator than you need, you will never have a pulsing problem. For instance, if you have a full size compressor in the garage that supplies constant 90psi, and you step that down to 50 psi through a hose that runs through your house to your hobby room, you may have pressure fluctuation near the 50psi mark. Plus, 50 psi is way too much for an airbrush anyhow.

So, in your hobby room, you hook up your air supply hose to a little hobby regulator with a moisture trap (they are about $20 on amazon), and set that to 15 or 20 psi. Connect a standard 6 ft or 10 ftairbrush. hose from there, and you're golden. It is important to have a moisture trap near the end of a long line, because you don't want water to unexpectedly sputter out of your airbrush and ruin your hard work.