SpudFiles

I have a 0.1 - 3.5bar regulator that I want to use for my experiments with hybrids. I think that the idea is acctually pretty good as you can adjust power on the spot.

Copperboy wrote:(I'm waiting for some 0-1bar meters right now.. maybe I'll just go for burstdisk manometric with onboard pump as air source.. portable..mmmm.. )

If you are going to use a burst disk on a portable cannon I HIGHLY suggest using a cam lock instead of a union to hold it.
I have never seen one in Norway but I just found a PDF with every fitting you could possibly imagine up to 6" rated to 100-1000bars.

They also have some nice pneumatic equipment that can be used for your meter (Including a pretty high quality regulator) along with manometers ETC.

They also have hydraulic rated pipes to good sizes that can be used for a high mix handheld hybrid. I mention this since you asked me for part vendors, you might have heard about them but it can't harm to have a look

Edited by jrrdw, bad url removed.

In regards to a regulator for a 1X mix, a BBQ grill regulator is set for 11 inch water column of pressure. Natural gas furnace regulators take an input pressure of about 6 inch WC and regulate to 3 or 4 for the pilot and burner. Many of these regulators can be disassembled and the regulation spring "adjusted" for a 1X mix pressure. A water Manometer can be built with clear tubing to set the pressure.

Most 1X builders use a meter pipe instead and higher pressure because it is easier to find pressure gauges for higher pressure.

There is no reason a 1X hybrid with regulated gas delivery into the chamber would not work. The difficulty with a piston 1X hybrid is getting the piston to seal. An air leak will over fuel it.

A burst disk 1X hybrid should work fine with a modified BBQ pressure regulator.

Be sure to shut off the gas before firing.

I think the only place where there should be mixed fuel and air is inside the combustion chamber. Anywhere else is dangerous. Just like having a premixed tank of oxy and acetylene. That would be exagerating it, but since the shock pump has a very small volume, and can contain some high pressures, I wouldn't be /too/ worried.