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Working Lego Cartridges
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 Group admin 
Quoting Max S.
Some time ago someone ( I doesn`t know who it was any more) asked for working Lego cartridges, which can be shot only by the hit of a hammer. Well, I made one, and I want that you take a look on it and comment it, because for the contest on Automatic Legoïŋ― Rifles I would build a gun that fires this rounds, and I wanna know what you think about it. You find the cartridge there: http://www.mocpages.com/moc.php/126457

Dude you're only allowed to add guns to the group with the acceptation of bow and arrows... No gun attachments or any of the sort. I'm sorry but it wouldn't be fair to the others if I let you keep your bullets here.
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| June 9, 2009, 5:52 pm
I believe I commented in an earlier thread about this... now I've made some pictures of my latest cartridge to clarify my story: http://mocpages.com/moc.php/127634
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| June 13, 2009, 4:38 pm
 Group moderator 
Quoting Jasper Jasper
I tried your cartridge Max S and it works great. Good accuracy and range. But if you put in a magazine fed weapon. I think the power will be drasticly reduced. Cuzz in Thomas Cooper his weapons the round is "stucked" inside. I guess you want to use this cartridge in that sort of weapon. Well if it is "stucked" that means there is preasure on it and I think that preasure screws up the power/accuracy. You should use it in a weapon where the round is not stucked in it. Some kind of bolt action....


Jasper your right. I noticed something about the cartridge as well. If you don't have enough pressure holding the bullet in the gun, the whole thing will fly out as you hit it with a hammer. If you can get it to stay in the gun with enough pressure it would work.

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| June 14, 2009, 11:06 am
 Group moderator 
I was also just thinking, what if you could make a full auto machine gun out if it? Have a bolt/piston that is tensioned forward, then have a bar,gear, or whatever pull the bolt/piston back then release it. If you could solve the problem of having the whole cartridge flying out, this could technically be possible.
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| June 14, 2009, 11:12 am
 Group moderator 
I just came up with a bolt action mechanism using Tom Cooper's spring system. But here is the major problem. There has to be a handle instead of having the handle in the stock. I will be researching this bolt idea, so I will give you guys feed back on it.
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| June 14, 2009, 1:07 pm
Quoting Max S.
Some time ago someone ( I doesn`t know who it was any more)

Me!

Well anyway, I did design a cartridge that 'some time ago', take a look at my home page to find it. I posted it a minute ago. It is similar, but more powerful than Thomas Coopers, and works off a pen spring.
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| June 15, 2009, 7:31 am
Only a tube and pin with spring? I'd be curious to see how that works.
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| June 16, 2009, 3:27 am
 Group moderator 
Quoting Jasper Jasper
guyz I discoverd (at the one I made) another problem. You see I use Max S his version with yellow pin, but I have to press the yellow pin realy hard before it even moves. I don't think that power can be genrated by a lego "hammer". I don't know if you guyz have the same problem so plz reply


That's what I was getting at earlier. How would you keep the whole round in the gun? You would have to put a lot of pressure on the round just to keep the casing in the gun.
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| June 16, 2009, 1:14 pm
 Group moderator 
I got my idea to work now. My research project will use a side feed striper clip to hold some of Tom's ammo. I will also get it to eject just like his. The only major difference would be that mine is bolt action. Instead of having the trigger do two things, mine will only stop the round from flying out. Hopefully I can get this all to work, but this is just research until my next weapon arrives in the mail.
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| June 17, 2009, 12:57 pm
Quoting Weston Wedeward
I was also just thinking, what if you could make a full auto machine gun out if it? Have a bolt/piston that is tensioned forward, then have a bar,gear, or whatever pull the bolt/piston back then release it. If you could solve the problem of having the whole cartridge flying out, this could technically be possible.

I made an automatic brick shooter once: http://www.mocpages.com/moc.php/90421 I had to cut a gear, it was ugly, and it failed miserably, but I bet that it's possible. I smell an epic gun... and me getting the 1400th comment!

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| June 22, 2009, 4:34 pm
Quoting Max S.
Some time ago someone ( I doesn`t know who it was any more) asked for working Lego cartridges, which can be shot only by the hit of a hammer. Well, I made one, and I want that you take a look on it and comment it, because for the contest on Automatic LegoŪ Rifles I would build a gun that fires this rounds, and I wanna know what you think about it. You find the cartridge there: http://www.mocpages.com/moc.php/126457

i experimented with your design of the cartridge and made one that the spring stuck to the bullet and it works very well. its just hard to come up with a gun design that will take the cartridges.
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| July 6, 2009, 4:00 pm
Quoting Max S.
You all donīt understand it. -.-
First, on the cartridge, but not on the projectile is pressure, so it works in Thomas Cooperīs design.
Second, take a chamber like Thomas Cooperīs and only the projectile (that is the black pin!!!!)
flies away, together with the spring, the pin flies ca. 6 metres and the spring ca. 3 metres.
And the projectile is only the pin and not other parts together with the pin!

im not sure who your talking to, but the only thing that flys out in the modified version of yours i made is the pin which is attached to the spring so you dont have to look for both. the shell that the pin/spring were in gets ejected out of the side through the breach
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| July 7, 2009, 11:35 am
Quoting Max S.
I donīt meant you, but when I see what the others write...Where should there be any pressure on the proectile, and why should the whole round flies out when you use a chamber like Thomas Cooperīs ones? I donīt know whats hard to understand on this. For those, who didīnt understand it yet: A technic pin hits the firing pin, the firing pin hits the black two stud lock rod(the projectile) and because of the power of the hit and the spring compressed behind the pin it flies out. You neednīt to pull the whole firing pin in, only a little hit is enough. Itīs similar to all the other designs in its basics how it should work, only in an other design. And the spring everytime comes out, too.
If this didnīt help, I donīt know what to do...

on mine you need to add quite a bit of pressure but it still works very well. i just uploaded my version of your cartridge. check it out here http://mocpages.com/moc.php/133844
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| July 8, 2009, 12:17 pm
I managed to figure out an automatic mechanism for this, which would obviousl us e a motor of some kind. If any of you have noticed the forbidden lego brick shooter, you will see the basic mechanism in play. Use a long technic beam, with the studded top covered in toothed plates, and a rubberband strung through the end hole as your bolt. Then take a lego motor, and attach a Clutch gear, which is a wonderful little piece, that when a certain amount of force is placed on the gear, an internal mechanism will allow the toothed outside to slip until no force remains. Basically, the bolt is pulled back by the motor with the clutch gear, until the force of the rubberband overcomes the gear, causing it to slip, letting the bolt slam foward, which would hit the end of the cartridge, propelling the round forward. Notice to all: by having the motor constantly pulling backwards, it removes the need for mindstorms programming, and the incredibly expensive cpu blocks, leaving you with just the need for a battery box and motor. The trigger would obviously be the buttons on the motor.
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| July 27, 2009, 9:11 am
nice idea. this clutch gear, is it mostly white? i think i have it, but mine doesnt work as you described it, but maybe im wrong. anyway, an alternative would be to use 3 40t gears, and use some pins to offset the middle one from the centre axis, so the teeth only connect with the rack at a certain point, and release it later. i did this when building that gun, as i didnt want to strip teeth from any cogs. the gun wasnt good anyway, as the motors werent strong enough, but with these bullets it might work
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| July 27, 2009, 2:26 pm
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