Search found 361 matches

by MRR
Tue Mar 03, 2009 3:36 pm
Forum: Pneumatic Cannons
Topic: Gas Operating Ammo Feeder (Semi Auto)
Replies: 24
Views: 2992

I simply drill a release hole in the housing where the piston shall stop.
by MRR
Tue Mar 03, 2009 3:13 pm
Forum: Pneumatic Cannons
Topic: Gas Operating Ammo Feeder (Semi Auto)
Replies: 24
Views: 2992

@POLAND_SPUD I simply like the idea of "recycling" pressure. When so many people tried it and didn't succeed it's even more a challenge. And if I fail than I'm not the first. I always have more fun building things than actually using them. @jsr I will build the piston rod as light as possible. I was...
by MRR
Tue Mar 03, 2009 12:03 pm
Forum: Pneumatic Cannons
Topic: Gas Operating Ammo Feeder (Semi Auto)
Replies: 24
Views: 2992

I think the main problem, when you operate at low pressure, is that the pressure escapes through the "catching holes" before the piston is able to overcome inertia and friction (thanks POLAND_SPUD for that idea). So I'm going to build a simple check valve system to prevent losing pressure. http://im...
by MRR
Mon Mar 02, 2009 3:54 pm
Forum: Pneumatic Cannons
Topic: Gas Operating Ammo Feeder (Semi Auto)
Replies: 24
Views: 2992

Maybe because your diagram is a little confusing . :wink:

A little bigger and slower animation would help.

I understood it but only after watching it several times.

....or did I !? :lol:
by MRR
Mon Mar 02, 2009 3:14 pm
Forum: Pneumatic Cannons
Topic: Gas Operating Ammo Feeder (Semi Auto)
Replies: 24
Views: 2992

Yea, it's more tricky than I guessed.

Otherwise there would be a lot more semi / auto on this website.
by MRR
Mon Mar 02, 2009 2:22 pm
Forum: Pneumatic Cannons
Topic: Gas Operating Ammo Feeder (Semi Auto)
Replies: 24
Views: 2992

@POLAND_SPUD I saw your diagram and thought, wouldn't it be easier to build a chamber sealer and connect the piston in the green housing with the pilot chamber? The spring would release the "blow barrel" a little before the main chamber opens. @THUNDERLORD I will sure try it and if it doesn't work I...
by MRR
Mon Mar 02, 2009 1:51 pm
Forum: Pneumatic Cannons
Topic: Gas Operating Ammo Feeder (Semi Auto)
Replies: 24
Views: 2992

I had the idea when I blew up a homemade silencer, so the potential is there. I think the problems are: >construction of a light piston that glides easy in the housing >the moving tee should glide easy but seal well >the return spring shouldn't be to strong or to weak >the position of the pressure c...
by MRR
Mon Mar 02, 2009 1:33 pm
Forum: Pneumatic Cannons
Topic: Gas Operating Ammo Feeder (Semi Auto)
Replies: 24
Views: 2992

Gas Operating Ammo Feeder (Semi Auto)

This is my idea of a gas operating ammo feeder. http://img404.imageshack.us/img404/9870/neu1.jpg Well it's nothing new (many weapon use it --> Ak47, BAR...) but I was asking myself if it works on a pneumatic or if someone already build something similar :evil3: (Yes, I used the search function). The...
by MRR
Mon Mar 02, 2009 11:49 am
Forum: Pneumatic Cannons
Topic: burst disk cartridge idea
Replies: 139
Views: 12525

Damn, every time I think that I have a good idea someone else did it before :evil3: .

I also had an idea about a gas operating ammo feed but a dead guy named "Browning" :wink: already did that.
by MRR
Sun Mar 01, 2009 12:46 pm
Forum: Pneumatic Cannons
Topic: burst disk cartridge idea
Replies: 139
Views: 12525

Nice, you already did. 8)

I had this idea for building a mortar. Dropping the cartridge into a pipe with a nail on the ground.

But i guess your new design has more flow....
by MRR
Sun Mar 01, 2009 12:08 pm
Forum: Pneumatic Cannons
Topic: burst disk cartridge idea
Replies: 139
Views: 12525

Has someone ever thought of building a cartridge with a mini coax piston? http://img523.imageshack.us/img523/9870/neu1.jpg When you place a tiny equalization hole in the piston and a light spring behind it, it's like a check valve and you can fill it from the front (red arrow). Now all you need is a...
by MRR
Sun Mar 01, 2009 9:46 am
Forum: General How-To & Discussion
Topic: Poweful new spudgun!
Replies: 22
Views: 1658

At least you can recycle you projectiles :lol:
by MRR
Thu Feb 26, 2009 12:43 pm
Forum: Pneumatic Cannons
Topic: A Good Tutorial For Beggining Spudders
Replies: 26
Views: 2754

@markfh11q
The blades that I'm using are extra thick handcraft blades. I use them alot at work, cutting all different kind of materials. Even with pliers they are hard to snap off (they never break at the breaking point).
by MRR
Tue Feb 24, 2009 12:06 pm
Forum: Pneumatic Cannons
Topic: Piston vs. Piston [Update: video comparison]
Replies: 59
Views: 4471

@jsr If I understand your post right the piston is "ONLY" actuated by the negative pressure when piloted ?
by MRR
Tue Feb 24, 2009 9:31 am
Forum: Pneumatic Cannons
Topic: Piston vs. Piston [Update: video comparison]
Replies: 59
Views: 4471

Perhaps it's just one of these "bumblebee cases". None knows how they do it, but they fly. Right now I feel like a creationist in front of a science tribunal, trying to proof something without facts. At least there was a discussion about it and that's what forums are about. And yes, I know that scie...