Hello, Does anyone any experience with (chinese) digital pressure gages for hybrid fueling? I would be using oxygen/propane mixture with highest ratios easily achievable (yes, my upcoming hydrid can handle that) Would something like this chinese meter be accurate enought? http://www.ebay.com/itm/Bat...

Now it works fine with aluminum burstdisk from soda can. I will post it soon to hybrid showcase.
Thanks for helping me.

Okey I will give it try I will upload results here. Two layers of soda can aluminium probably makes good burstdisk for 6x on 1" union but probably best way to find good burstdisk is by testing.

But anyway thanks for helping I greately appreciate it

Now I got it firing with aluminium burstdisk and it did fire pretty well (I think :D ). But when I tried harder burstdisk (metal part from springless can 0.2mm thick) mixture did burn but burtsdisk didn't break. I believe that my mixture isn't powerfull enought to break anything harder than aluminiu...

I'm filling air from normal compressor so should I rapidly open ball valve or wery slowly to get best bossible mix. I will try that your "shaking" method tomorrow.

I'm using manometric meter and it's volume is aprox 33 cubic centimeters including hose from propane tank. That black/gray thing top of the propane tank is regulator. Chamber volume is aprox 400 cubic centimeters. http://i1373.photobucket.com/albums/ag398/c0ff/IMG_3036_zps3981ac5a.jpg Gauge close-up...

I got bit of problem with my hybrid, I won't get it fire. Propane burns but it won't be powerfull enought to break burstdisk. I get it fire once with 6x mix so it was 5 bars of air and 25 kpa of propane but I had no luck getting it fire after that. Burstdisk I used was few layers of aluminium foil. ...

Hmm why you don't want o-rings?
Othervise looking good :thumbright:

If those batterys arent requirement buy this
http://www.finnkone.fi/index.php?section=9

Hi, Lets say that your compressor is draving 2A @ 230v so it is 500w copmressor. That means you need 700w AC converter to be on safeside. If you have four 100Ah 12v batterys each of them holds 1200w so with 4 batterys you have 4800w So if you run your 500w compressor for one hour it takes 500w/h and...

Semi Auto marble sniper and 300psi filled bottle in backpack.

I don't think so,
Combustion is quite hot but fast.
If you don't believe me make small test cannon and put O-Ring inside then will you know.

Well it's over size pen
But heres damage.

http://imageshack.com/a/img571/3305/o7cb.jpg
http://imageshack.com/a/img443/9026/czhb.jpg

sory about those blury pics and last but not leats a shooting video
[youtube][/youtube]

Thanks,
I will post some more pic's and mayby a video tomorrow.

Hi I just made pengun for unreg Co2. Here some specs. Caliber: 6mm Velocity: Aprox 170-200 m/s Body: 15mm copper pipe w/1mm wall Lenght: 30cm Pressure used: 60bar/1000psi Ammo: 6mm 0.30g Plastic BBs for now Pilot: Standard epoxy piston with rubber seal Some parts of this gun is machined. Now some pi...