It is a simple design, (despite appearances), that performs very well. Despite all of boogieman's theories on how tee chambers were detrimental to mini designs, this one works great! I had to make a smaller meter attachment to get the right mix, but that only set me back 13 bucks.
The chamber is 550 mL, and the barrel is 3/4" SCH-40 PVC 5' long. The ignition is provided by two lengths of #6 allthread tapped, (yes, actually tapped, not just screwed), into the bottom of the tee where the tee overlaps the 2" SCH-40 pipe connecting it to the bottom endcap.
The back of the launcher is a SCH-40 NSF-pw pressure rated female cap screwed onto a male adapter.
As with all my launchers, I use male auto couplings, (quick connects), for my metered propane. The Schrader valve is used to vent the chamber, and of course to fuel the launcher to a 1.2x mix.
The reason I used all of these pressure rated fittings and safe construction methods is so I could take it up to a 1.2x/1.2x atm mix. That's about the highest I'm willing to go, though. Any higher than that and I'd be classified as "crazy".
Here's some pictures...
- The full launcher...
- full.jpg (39.87 KiB) Viewed 1702 times
- Chamber detail...
- Breech loading detail...
- The meter attachment...
- Thank McMaster...
- schrader.jpg (12.75 KiB) Viewed 1702 times
- What a compression nut did to a Chek can...
- chek.jpg (27.31 KiB) Viewed 1702 times
They're actually cheaper at the feed store than the hardware store's DWV fittings. Heh heh...