Get rubber washers with an ID the same as the OD of the steel fitting you are worried about. (Garden hose washers ?)

Now stack and glue enough of them, to bring the bumper surface past the steel fitting.

Done.

If you have to grind any of the steel fitting away, on the inside, don't grind too much.

The shot penetrated easily. It went through the plywood. Through a piece of pipe, about 4 feet behind that. Through a fiberglass window cover. Through the window. And through the side of a cabinet about 7 feet further on, after the window. Been taking lessons from DYI, have we? That poor shed of hi...

jackssmirkingrevenge wrote:Also, spudder's bathtub

I believe that is a utility sink.

And while I pay homage to the guy's ingenuity, there should be two check valves in there.

I wondered what would happen if I shot my ramrod, instead. Sectional density FTW! Nice bit of testing :) Thank you. It took me long enough ! ;) My edit was just a small boo-boo correction. I called the Marshmallow Cannon the Mouse Musket. The correction was not new post worthy. I figured that out ;...

Oops.. Made a reply instead of an intended edit... That is what I think is ridiculous about all the push to go back and edit a post, rather than post anew. I would never have known that you edited your post, if you hadn't accidentally posted this way. I think it is just plain stupid to be so insist...

saefroch wrote:You could always go for a basic check-valve design in the piston to improve performance further, instead of using a pilot valve with higher flow.

You know, in time I just might do that.

Selador, the type of explosion you are describing is a BLEVE, which is commonly seen with liquified propane canisters and the like... This was not a BLEVE, and I doubt the rocket moving had anything to do with it. This rocket simply failed as the materials could not handle the rate of combustion. I...

Looking forward to that buckshot round, be sure to film it! I finally got the time to put the one inch barrel on the gun, and give it a try. Here is the gun setup. http://www.quittintime.com/attachments/13128-1inchbarrel.jpg I like this setup. Now I may spend the rest of the winter making it look b...

In pretty much it's simplest form, what you need is a way to 'trigger the trigger'. Attach something to the valve rod. Now, use the trigger you have, to pull back on that something. But have no connection between the two. So that, once your trigger pulls back on the valve far enough to start it open...

I want to insert a piece of pipe in a fitting in the pilot of my 2" piston valve, and fill around it with Great Stuff. I am just not sure if it will be able to withstand the pressure? I will be using a max of 120 psi. Use the foam in the way that you wish. But then cut away some of it, and fill the...

I found a video showing someones "hybrid rocket" failing violently. It made me nervous because my cannons are aluminum, like this guy's rocket. Why did this rocket blow up like that? Anyone know whats going on here? IMO that "rocket" failed because it moved. And because the parts were not solidly c...

velocity3x wrote:I always wondered what was inside my arm. I discovered that it just contains more arm. Be careful when in your shop. This is what sheet metal can do.

Man, I had to block that image.

It was giving me the heebie jeebies.

Gippeto wrote:And I've been tossing around ideas for my own version of the shoebox compressor.

Ok.

Dish.

So for a even remote safety margin, you can have a differential of 50,000 psi between each layer. If you made something with all these layers... Wouldn't each layer have to be fully contained, and floating within it's outer layer, without touching, anywhere ? (To be effective in the way theorized h...

See my Monsoon hunting here Hi coolshare. Welcome to spudfiles. I would like to suggest that you don your fireproof undies, because you just might get flamed here, pretty soon. LOL You have not only brought back a thread that is over two years old... (Personally, I don't think that is a bad thing. ...