Which Rainbird valve did you use? I used the CP-100, I believe... I did a search on it as soon as I got home from the store, and only one thing came up on this website. It was a person saying that they did NOT like it because they thought it opened too slowly. One other person out there in the worl...

this guy has contributed more to the forums in his 9 posts than you have in your 375.

That is a lovely thing to say. Thank you.

hey mtaylor were not mofos but dont effing come abck here crying saying u blew ur hand off because u forgot to sand clean and prime the pipes...i can guarentee 100 percent that that gun is not primed and wont hold 200 psi...letalone maybe 120...it will hold for like the first 5 time but then ur glu...

you sure you cement is rated for 200 psi? look at the fine print it most likey says something along the lines of The container says: A regular bodied, fast set PVC Solvent Cement (clear) designed for use on PVC pressure pipe and fittings: Schedule 40 through 4", & Schedule 80 up to 2", Types I & II...

I checked the cement that I used. It is pressure rated up to the limit of the pipes that I used, which max out at 230psi. The end caps will are also pressure rated. These fittings are for natural gas piping etc. Plus, the T-joints are layed, as they have the pressure rated piping inside the length o...

By the way, I was able to fit the control circuitry into one of those little Starbucks After Coffee mint tins... So, it shouldn't take up too much space.

This is a follow up for TwitchTheAussie: Below is a scanned schematic for the laser-activated combustion circuit. Note: You have to modify an electronic barbeque ignitor. I got mine from Lowes Hardware store. It came with a AAA battery installed, with a big dumb red button on the top. Two leads came...

use it next time. because you didnt use primer, you probably shouldnt go past about 100 psi or so, something might pop off. If you were wondering if I used a pvc appropriate cement, well then, duh... Of course. I don't want to kill myself. This is only a hobby for me. I have bigger things to fry.

and could you put up the circuit diagram for the remote ignition? I had a feeling that someone would ask for a schematic for the laser-ignition... I will draw one up and attach it to this topic. What size is your tank gonna be It will have a base that is slightly shorter than the length of the gun....

you did a really good job with the primer. (you did use primer didnt you?) By primer, do you mean paint? i would suggest shotening the hose though I was planning on making it shorter once I got the turret portion of the robot completed. The hand-held valve will be compressed using a pull-type solen...

This is MY first pneumatic spud gun. I have made several combustion guns before, but I grew tired of the hassle of the right mixtures of propellant/air and having to keep it so darn clean... Actually, my combustion guns were cool: I made my own sparking device by inserting threaded rod in towards th...