20 replies to this topic

[Bullshit Dragon]

Okay, so while i was doing some work on my current project (I'll put it up in the homemade pic thread when it's done) and I wonder what I should do to stiffen a portion of it that's going to be used to "barrel tap" people. The problem I ran into was what I should do to stiffen it, or if I should run the risk of it splitting every time I tap someone with it. I have some pics to aid in what I'm talking about.


This is the main shape of the "tap" portion. (the contact surface is the longest side)


This is option 1 for reinforcing it.


This is option 2 for reinforcing it. (note that there are fewer ribs, but they run a longer distance)


Which rib set would be more viable?

EDIT: 400th post!

Edited by Bullshit Dragon, 11 May 2009 - 08:05 PM.

[diamondbacknf1626]

It seems as if your force is primarily coming from beneath that side, even though it is drawn as a diagonal. Personally, I would recommend the vertical support struts. Yes, they are smaller, but that provides them with less of a chance of breaking. Also, that would cushion more of the force that you have drawn.

Personally, I'd go with a completely different design. Will edit the pic in shortly.

[nerfer63]

What are you going to do with it kill some one? What will it be made out of? If it is for killing some one use option 1.

[GoldHawk]

Ideally, I'd recommend placing the ribs perpendicular to the striking surface, but if that can't be done I'd say option 1 would be the next best. Option 2 looks like it'd collapse toward the smaller point, which if that's the end of the barrel might end up hitting someone.



Edit: rethought, changed my mind
Edit2:pic

Edited by GoldHawk, 11 May 2009 - 08:02 PM.

[diamondbacknf1626]

Something like that would be your best bet. The triangular structures give you a ton of support, but I'm not quite sure if you're willing to go that in depth into it. I highlighted each area (Triangles facing each direction), and the green are the vertical support struts I had said would be the best. Don't necessarily take my word on it, but I think this would be your best bet.

But yeah, are you killing someone with this? I mean, the barrel tap's more of a mercy rule...not meant to kill someone with.

Edited by diamondbacknf1626, 11 May 2009 - 07:57 PM.

[Bullshit Dragon]

@Nerfer63: I'm not trying to kill someone with it, although it would be kind of funny to read the headline "College Student Killed by Nerf Blaster" Don't worry, I'm going to be removing all sharp edges and points. This is just the general shape of it.

@Diamondback: While your design is good and would offer A LOT of support, it unfortunately adds a lot of WEIGHT. I'm trying to figure out which rib set would give me the most support for the least amount of weight.

[diamondbacknf1626]

You could use the same material used for +bow plunger rods. It's ligthweight, and would most likely be sufficiant strength-wise. How large is this structure? Dimensions would help.

[One Man Clan]

Just "barrel tap" with your barrel. A bayonet is a stupid idea and it will only look ridiculous.

As for ribs, I prefer a dry spice rub and some kind of honey glaze on mine.

[TantumBull]

I'm fairly certain that's the best way to do it. I've taken CAD engineering if that helps my case at all. Adding ribs will give a lot of extra space to get a gun hit, though.

Edited by TantumBull, 11 May 2009 - 08:16 PM.

[nerfer63]

@Nerfer63: I'm not trying to kill someone with it, although it would be kind of funny to read the headline "College Student Killed by Nerf Blaster" Don't worry, I'm going to be removing all sharp edges and points. This is just the general shape of it.

@Diamondback: While your design is good and would offer A LOT of support, it unfortunately adds a lot of WEIGHT. I'm trying to figure out which rib set would give me the most support for the least amount of weight.

added that hilarious quote to my signature, while playing with my butthole

[Bullshit Dragon]

@OMC: It's not a "bayonet" per se, it's deliberately built into the shell.

@Diamondback: the portion I'm getting help with right now is 15.5"x4"x16" and the entire blaster is 26" from tip to tail, and 1.5" thick.

EDIT: Hell yes! I got added that hilarious quote to my signature, while playing with my butthole!

Edited by Bullshit Dragon, 11 May 2009 - 08:16 PM.

[diamondbacknf1626]

Personally, I'd go with OMC's suggestion. I'd say "sounds delicious," but something tells me people are hunting for sigs in this thread already.

Second choice though, I would go with tantum, but the problem is is that some of the struts would get to the point where they would not provide any structural support from that angle (The ones towards the top). Due to those dimensions, the support struts towards the top if they all extend from the vertex that tantum dEffeminateted, would not provide very much if any support. Out of the options, I'd personally go with A, or a combination of both, like mine.

Good point about the gun hit though. I'd just barrel tap with your barrel. This adds too much surface area.

[Bullshit Dragon]

Well, since option A (or a variation there of) has been the general consensus (other than "this part is useless") I'm going to go with option A.

This thread can be ended now.

I'll probably be looking for help on this later once I actually have it cut out and ready to go.

Edited by Bullshit Dragon, 11 May 2009 - 08:29 PM.

[wingd man]

@OMC: It's not a "bayonet" per se, it's deliberately built into the shell.

@Diamondback: the portion I'm getting help with right now is 15.5"x4"x16" and the entire blaster is 26" from tip to tail, and 1.5" thick.

EDIT: Hell yes! I got added that hilarious quote to my signature, while playing with my butthole!

Well (I hope) your not going to be pistol whipping somebody with this, I mean, emphasis on "tap". But I'd go with Tatum Bull.

Also: added that hilarious quote to my signature, while playing with my butthole

EDIT: sorry, didn't see the last post.

Edited by wing'd man, 11 May 2009 - 08:30 PM.

[BustaNinja]

hehehe, you are gonna try to barrel tap people? Awesome. I really wanna be there for this.

Jokes aside, just make it a solid piece and foam the edge. its worked for me. Like using a solid piece of polycarbonate.

[diamondbacknf1626]

In engineering terms, if the strength is in the edges, then the appropriate rule is to triangulate. Only diamondback's suggestion actually does that, though it's rather excessive about it. Your best bet, really, is to run a rib from the middle of each side, to the middle of each other side, for a total of three ribs, subdividing the original triangle into four.

Good call. Yeah, mine was a bit excessive...but like bob said, it's the same concept he's talking about. I like this better though; it's far more simple and would do the job.

Edited by diamondbacknf1626, 11 May 2009 - 09:59 PM.

[Bullshit Dragon]

hehehe, you are gonna try to barrel tap people? Awesome. I really wanna be there for this.

Jokes aside, just make it a solid piece and foam the edge. its worked for me. Like using a solid piece of polycarbonate.

Wait... you mean instead of reinforcing it, I should make the shell portion of it then fill it with expanding foam (like GreatStuff?)

[BustaNinja]

hehehe, you are gonna try to barrel tap people? Awesome. I really wanna be there for this.

Jokes aside, just make it a solid piece and foam the edge. its worked for me. Like using a solid piece of polycarbonate.

Wait... you mean instead of reinforcing it, I should make the shell portion of it then fill it with expanding foam (like GreatStuff?)

No, like make it one solid piece, then put foam (like pipe insulation or something) on the edge.

[Ogami]

In terms of putting the ribs vertically or horizontally it really depends on the angle of the force, if the x-axis of the force is greater the the y-axis then horizontal ribs would be best, y-axis>x-axis then vertical ribs would be best. (Hopefully this makes sense with the diagram.)

If you want to use a more elaborate rib system I would go with Just Some Bob's diagram.

[nerfnukerz]

This entire thread makes me want to pull my brains out through my eyes.

GO WITH REINFORCEMENT OPTION 1. There is no need to overcomplicate this that much. Option 1 would provide good resistance to force going in the direction shown in the diagram, and for force coming from the direction of the tip, the wedge shape would shunt off the blow. Really, how complicated does it have to be?

[Bullshit Dragon]

This entire thread makes me want to pull my brains out through my eyes.

GO WITH REINFORCEMENT OPTION 1. There is no need to overcomplicate this that much. Option 1 would provide good resistance to force going in the direction shown in the diagram, and for force coming from the direction of the tip, the wedge shape would shunt off the blow. Really, how complicated does it have to be?

I know I should go with option one. I posted a bit back that this thread could die, but I see hardly anyone taking the hint.

Seriously people, I got the help I need, let this die.

Edited by Bullshit Dragon, 12 May 2009 - 07:49 PM.