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"In the world of spuds today"

A place to ask general spud cannon related questions.
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Re: "In the world of spuds today"

Unread postAuthor: jackssmirkingrevenge » Mon Aug 27, 2018 4:47 am

A larger smoothbore definitely gives you a lot of options in terms of projectiles, I love my Farco :D
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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Re: "In the world of spuds today"

Unread postAuthor: farcticox1 » Wed Sep 12, 2018 4:38 pm

Just playing with an old 5/3 air pilot valve and a small push button 3/2 for the trigger, this actually works for a single shot, if I take the plug out of the port on the bottom right it goes full auto crazy :shock: it dumps the pilot air, closes the valve which brings back the pilot air, not what I want but pretty neat if I did.

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Re: "In the world of spuds today"

Unread postAuthor: farcticox1 » Thu Nov 01, 2018 5:48 pm

Going to make a 4.5mm BB gun, not sure if it will end up being select fire or full auto. Using wood for the first time, the body will be 2 pieces of 3/4 plywood joined together, magazine will be spiraled around the chamber and be air fed from air bleed off the barrel. Should hold at least 200 bbs.

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Re: "In the world of spuds today"

Unread postAuthor: keks2033 » Fri Nov 02, 2018 2:45 am

200 bar :shock: ?
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Re: "In the world of spuds today"

Unread postAuthor: jackssmirkingrevenge » Fri Nov 02, 2018 6:02 am

keks2033 wrote:200 bar :shock: ?


I think he means 200 rounds of ammunition ;)

Here's something I pondered a while back, with the air both pushing the BBs down the mag and firing them, limited by a detent.

Image

The issue with detent type mechanisms as I found here is that the next BB tends to block off the flow for the one in the barrel before it leaves the muzzle.

One solution is to have a "blocker" that allows air to go through but doesn't let another BB feed until the chamber depressurizes, but it all gets a little complex:

Image

It sort-of worked but lacked reliable feeding in the prototype I made, didn't take it further though:



Theory and development is listed in this thread with plenty of other designs and configurations discussed.
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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Re: "In the world of spuds today"

Unread postAuthor: farcticox1 » Fri Nov 02, 2018 4:36 pm

keks2033 wrote:200 bar :shock: ?


Only 10 bar :?

I got one of these coils which is a perfect fit around 1" stainless tubing, also will be able to see the BB's inside, going to fill it from the back through a capped T fitting :idea: :idea:

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Re: "In the world of spuds today"

Unread postAuthor: wyz2285 » Mon Nov 05, 2018 10:25 am

The air from the barrel probably won't give you consistent feeding, from my experience what happens with magazines like this is like the Schrodinger's cat, never know when the pressure is pushing the bbs to feed or the Venturi effect is sucking them other way. The magazine need to be more linear to the barrel so the pressure is high enough. But that's back when I didn't have a steady air supply. worked well for this guy tho
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Re: "In the world of spuds today"

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Re: "In the world of spuds today"

Unread postAuthor: farcticox1 » Mon Nov 05, 2018 7:07 pm

It's going to be Full Semiauto. :shock:
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Re: "In the world of spuds today"

Unread postAuthor: hectmarr » Tue Nov 06, 2018 8:36 am

In my case, the shutter of the BBs worked quite well. The BB that goes off always comes out, and then the other enters. Cute project farcticox 1
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Re: "In the world of spuds today"

Unread postAuthor: hectmarr » Tue Nov 06, 2018 8:39 am

jackssmirkingrevenge wrote:
keks2033 wrote:200 bar :shock: ?


I think he means 200 rounds of ammunition ;)

Here's something I pondered a while back, with the air both pushing the BBs down the mag and firing them, limited by a detent.

Image

The issue with detent type mechanisms as I found here is that the next BB tends to block off the flow for the one in the barrel before it leaves the muzzle.

One solution is to have a "blocker" that allows air to go through but doesn't let another BB feed until the chamber depressurizes, but it all gets a little complex:

Image

It sort-of worked but lacked reliable feeding in the prototype I made, didn't take it further though:



Theory and development is listed in this thread with plenty of other designs and configurations discussed.

In minute 1 of the video the ammunition hitting the target sound better than my drummer! :shock: jajajajaja :bounce:
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Re: "In the world of spuds today"

Unread postAuthor: hectmarr » Tue Nov 06, 2018 8:39 am

jackssmirkingrevenge wrote:
keks2033 wrote:200 bar :shock: ?


I think he means 200 rounds of ammunition ;)

Here's something I pondered a while back, with the air both pushing the BBs down the mag and firing them, limited by a detent.

Image

The issue with detent type mechanisms as I found here is that the next BB tends to block off the flow for the one in the barrel before it leaves the muzzle.

One solution is to have a "blocker" that allows air to go through but doesn't let another BB feed until the chamber depressurizes, but it all gets a little complex:

Image

It sort-of worked but lacked reliable feeding in the prototype I made, didn't take it further though:



Theory and development is listed in this thread with plenty of other designs and configurations discussed.

In minute 0, 34 of the video the ammunition hitting the target sound better than my drummer! :shock: jajajajaja :bounce:
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Re: "In the world of spuds today"

Unread postAuthor: keks2033 » Tue Nov 06, 2018 12:01 pm

Theory and development is listed in this thread with plenty of other designs and configurations discussed.[/quote]
In minute 0, 34 of the video the ammunition hitting the target sound better than my drummer! :shock: jajajajaja :bounce:[/quote]
I also did the machine, worked on 10 bar
here's another one with a different automation system
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