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mechinasm help
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please help i need to know how to make a gun semi out n no cocking just pull the trigger with a clip in it. i will be so grateful to the people who help me.
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| February 8, 2009, 2:28 am
Quoting Alter Ego ROFL
please help i need to know how to make a gun semi out n no cocking just pull the trigger with a clip in it. i will be so grateful to the people who help me.

Wow, that's tough! I think you got to build a semi auto rubber band gun, then add a clip so that the rubber bands will take the bullets with them when they fly out of the gun. Ask Jonjejanssie for a model.
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| February 10, 2009, 9:21 am
 Group moderator 
Quoting Hoang Phong
Wow, that's tough! I think you got to build a semi auto rubber band gun, then add a clip so that the rubber bands will take the bullets with them when they fly out of the gun. Ask Jonjejanssie for a model.

Thanks. You like my guns don't you? Yeah, he can use my Full-auto brick shooter instructions, or he needs a double-action mechanism.

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| February 10, 2009, 1:51 pm
 Group moderator 
Think about how a revolver works. The trigger and hammer are two separate entities; they are not directly connected to each other, but they push on one another. When you pull the trigger, the hammer pivots back until it crosses an internal threshold. The hammer is on a spring that opposes backward rotational motion. It then pivots forward under full influence of the spring and strikes the primer. Releasing the trigger resets the internal mechanism to the original position. You can adapt this method to a semi-automatic mechanism. Here's an oversimplified way: Pin on a spring behind the ammo. Pull the trigger and it pulls the pin away from the bullet until the trigger passes a point where it lets go of the pin. The pin strikes the ammo with enough force (hopefully) to propel it out of the gun. Here's a good flash object that shows how a revolver works: http://science.howstuffworks.com/revolver2.htm
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| February 10, 2009, 3:49 pm
thanks for the help guys
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| February 10, 2009, 11:49 pm
Quoting PyBrick Replicas
Think about how a revolver works. The trigger and hammer are two separate entities; they are not directly connected to each other, but they push on one another. When you pull the trigger, the hammer pivots back until it crosses an internal threshold. The hammer is on a spring that opposes backward rotational motion. It then pivots forward under full influence of the spring and strikes the primer. Releasing the trigger resets the internal mechanism to the original position. You can adapt this method to a semi-automatic mechanism. Here's an oversimplified way: Pin on a spring behind the ammo. Pull the trigger and it pulls the pin away from the bullet until the trigger passes a point where it lets go of the pin. The pin strikes the ammo with enough force (hopefully) to propel it out of the gun. Here's a good flash object that shows how a revolver works: http://science.howstuffworks.com/revolver2.htm

Yup, that sounds the best way to make a realistic semi-auto. But it won't go very far, considering the smashing action won't transfer its entire force into the projectile, and your finger can't deliver much force while it depends entirely on the trigger pulling force to throw the bullet. I think it is most suitable for a shotgun with fragmentation ammunition like, say, chalk.
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| February 11, 2009, 10:27 am
I'm not in the position to speak anyway, I've never made a brick shooting gun before, and I'm not planning to make one too. Don't wanna lose bricks/break bricks/poke somebody's eyes out.
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| February 11, 2009, 10:31 am
 Group moderator 
Quoting Andrei Rozhin
Quoting Hoang Phong Yup, that sounds the best way to make a realistic semi-auto. But it won't go very far, considering the smashing action won't transfer its entire force into the projectile, and your finger can't deliver much force while it depends entirely on the trigger pulling force to throw the bullet. I think it is most suitable for a shotgun with fragmentation ammunition like, say, chalk.
Yeah thats true most of the force, goes into breaking the gun appart (I tried it on my still in progress SVD) So best way is a spring not a hammer thing.
Yeah, I realize that it would only be good for replicating a semi-auto feature more realistically, with low tension springs or rubber bands.. I'm working on that design right now. So I'm going back and forth between the AR57 and a semi-auto mechanism (non-firing).
Permalink
| February 11, 2009, 5:44 pm
Quoting PyBrick Replicas
Quoting Andrei Rozhin
Quoting Hoang Phong Yup, that sounds the best way to make a realistic semi-auto. But it won't go very far, considering the smashing action won't transfer its entire force into the projectile, and your finger can't deliver much force while it depends entirely on the trigger pulling force to throw the bullet. I think it is most suitable for a shotgun with fragmentation ammunition like, say, chalk.
Yeah thats true most of the force, goes into breaking the gun appart (I tried it on my still in progress SVD) So best way is a spring not a hammer thing.
Yeah, I realize that it would only be good for replicating a semi-auto feature more realistically, with low tension springs or rubber bands.. I'm working on that design right now. So I'm going back and forth between the AR57 and a semi-auto mechanism (non-firing).

You should try some shooting guns. Replica is one thing, shooting is another.
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| February 12, 2009, 10:14 am
If threadnomancy doesn't apply...

I've designed a system extroadinarily close to a revolver, you pull the trigger and the hammer moves back three studs and then the trigger slides off. Hammer flies forward and hits the bullet, trigger clicks back into position.

The problem is despite this it only goes 1/2 metre-1 metres. So it doesn't work so well. (Just to save people the time of trying all this out).

I have ideas though.
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| April 21, 2009, 6:11 pm
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