Super Soaker Central forums

Ben · 01-27-2008, 10:44 PM

That's actually exactly how my Lanard Triple Shot advances the turret. I guess he got the idea from other manufactured guns. Sadly that was the project he never completed.

I might post my turret at NerfHaven depending on how busy I am this week. I'll repost the link here when I do. Right now my schedule doesn't look too bad. I used to have Thursdays nearly free with 8 hours of class on Wednesday... now that I switched into a different Physics lab I have 5 hours on Wednesday and 4 hours on Thursday, which is much better than 8 hours on one day.

Ben · 01-28-2008, 09:42 PM

Today I asked my ENES102 teacher about workshops on campus, and he told me the only one students can use are in JMP. I knew about those ones, but I thought they were only for ENES100 students, but he said they can be used by anyone given that they're not being used at the moment. That's good for me, because this semester there are fewer ENES100 classes than last semester, and they don't start using the workshops until the second half of the semester. I might be able to make something at school now, depending on my schedule of course. They have some pretty good equipment in there with a wide variety of saws, drill bits, saw blades, etc., and some nice people who know how to use them very well.

I also now have access to ProEngineer CAD software, which is a lot easier to use than AutoCAD and more precise than SketchUp. It also can be used with the stereolithography equipment, which means I should be able to get pretty neat custom parts for free now. I'm still investigating it obviously, but I can't wait. There are a whole lot more possibilities now.

Silence · 01-28-2008, 10:08 PM

Sounds good for you...I guess I'll just have to wait a couple years for my turn. I'm still waiting to see how far you can go in terms of complexity and requirement of fabrication. So far things have been kept fairly simple.

I'm not much of a CAD person, and I even like drawing things out by hand. Good luck to you though.

Ben · 01-28-2008, 10:13 PM

I'm not much of a CAD person either, but you probably know that. If I could plug the rapid prototyping equipment directly into my head and make whatever I imagined, that would be perfect. CAD is just an intermediate step to me, but it's becoming more necessary in more complex designs not only to aid in the fabrication of parts (whether with a printed guide or CNC equipment) and visualization.

Now I'm thinking about designing something like a small pistol sized water gun to test out what I know... shouldn't be too hard.

Silence · 01-30-2008, 08:43 PM

A small water gun would be a really unique step. You could easily get decent flow, although below average shot time, with a pistol. Couple that with a solid nozzle and performance shouldn't be very shabby at all.

I'm not sure where the complexity comes into play though. Even a simple pressurized reservoir water gun, with a piston to separate air and water in a horizontal tank, would have robust design. You could reverse the pump to make it even more compact, although you'd be pushing and not pulling on the handle.

Ben · 01-30-2008, 10:54 PM

The small water gun doesn't need to be complex. I just think something small would be easier to design due to the size and it could be made in one step by the stereolithography machine. PVC doesn't do well for size sadly.

If that works I think I might make a cross between the XP 150 and the XP 300 with some improvements on both designs. That would be neat...

In other news, I finally got around to posting about my Nerf turret on NerfHaven: http://nerfhaven.com/forums/index.php?showtopic=10684

Normally I'd write more, but I'm pretty tired.

Silence · 01-31-2008, 04:53 PM

Air pressure finally seems to be working its way into Nerf homemades. Drenchenator's homemade was probably ignored mainly because everybody was obsessed with springs at the time.

Good point you made there regarding why you should fire from the barrel at the bottom, not the one at the top. Actually you could calculate the normal force coming from the weight of the barrel, torques, etc.

Well, I'm interested to see what you do for the pistol. It sounds like you're heading down the commercial water gun style route. Just make sure you do stress-testing and the like.

01-27-2008, 10:44 PM	#61
Ben Founder Join Date: Mar 2003 Location: Maryland Posts: 5,985 UserID: 1	Re: Water gun structures That's actually exactly how my Lanard Triple Shot advances the turret. I guess he got the idea from other manufactured guns. Sadly that was the project he never completed. I might post my turret at NerfHaven depending on how busy I am this week. I'll repost the link here when I do. Right now my schedule doesn't look too bad. I used to have Thursdays nearly free with 8 hours of class on Wednesday... now that I switched into a different Physics lab I have 5 hours on Wednesday and 4 hours on Thursday, which is much better than 8 hours on one day. __________________ email: ben at sscentral dot org / Forum rules Read this page before emailing me. Do not send me a PM or email with a water gun question if someone else could answer the question. Post at the forums. You will get a response from me along with others' views or ideas. Do not send me a PM or email about reading a certain post unless it's been a few days since you've posted. I try to read every post.

01-28-2008, 09:42 PM	#62
Ben Founder Join Date: Mar 2003 Location: Maryland Posts: 5,985 UserID: 1	Re: Water gun structures Today I asked my ENES102 teacher about workshops on campus, and he told me the only one students can use are in JMP. I knew about those ones, but I thought they were only for ENES100 students, but he said they can be used by anyone given that they're not being used at the moment. That's good for me, because this semester there are fewer ENES100 classes than last semester, and they don't start using the workshops until the second half of the semester. I might be able to make something at school now, depending on my schedule of course. They have some pretty good equipment in there with a wide variety of saws, drill bits, saw blades, etc., and some nice people who know how to use them very well. I also now have access to ProEngineer CAD software, which is a lot easier to use than AutoCAD and more precise than SketchUp. It also can be used with the stereolithography equipment, which means I should be able to get pretty neat custom parts for free now. I'm still investigating it obviously, but I can't wait. There are a whole lot more possibilities now. __________________ email: ben at sscentral dot org / Forum rules Read this page before emailing me. Do not send me a PM or email with a water gun question if someone else could answer the question. Post at the forums. You will get a response from me along with others' views or ideas. Do not send me a PM or email about reading a certain post unless it's been a few days since you've posted. I try to read every post. Last edited by Ben : 01-28-2008 at 09:49 PM.

01-28-2008, 10:08 PM	#63
Silence Administrator Join Date: Apr 2006 Location: Virginia Posts: 3,251 UserID: 576	Re: Water gun structures Sounds good for you...I guess I'll just have to wait a couple years for my turn. I'm still waiting to see how far you can go in terms of complexity and requirement of fabrication. So far things have been kept fairly simple. I'm not much of a CAD person, and I even like drawing things out by hand. Good luck to you though. __________________ Forum Rules

01-28-2008, 10:13 PM	#64
Ben Founder Join Date: Mar 2003 Location: Maryland Posts: 5,985 UserID: 1	Re: Water gun structures I'm not much of a CAD person either, but you probably know that. If I could plug the rapid prototyping equipment directly into my head and make whatever I imagined, that would be perfect. CAD is just an intermediate step to me, but it's becoming more necessary in more complex designs not only to aid in the fabrication of parts (whether with a printed guide or CNC equipment) and visualization. Now I'm thinking about designing something like a small pistol sized water gun to test out what I know... shouldn't be too hard. __________________ email: ben at sscentral dot org / Forum rules Read this page before emailing me. Do not send me a PM or email with a water gun question if someone else could answer the question. Post at the forums. You will get a response from me along with others' views or ideas. Do not send me a PM or email about reading a certain post unless it's been a few days since you've posted. I try to read every post. Last edited by Ben : 01-28-2008 at 10:21 PM.

01-30-2008, 08:43 PM	#65
Silence Administrator Join Date: Apr 2006 Location: Virginia Posts: 3,251 UserID: 576	Re: Water gun structures A small water gun would be a really unique step. You could easily get decent flow, although below average shot time, with a pistol. Couple that with a solid nozzle and performance shouldn't be very shabby at all. I'm not sure where the complexity comes into play though. Even a simple pressurized reservoir water gun, with a piston to separate air and water in a horizontal tank, would have robust design. You could reverse the pump to make it even more compact, although you'd be pushing and not pulling on the handle. __________________ Forum Rules

01-30-2008, 10:54 PM	#66
Ben Founder Join Date: Mar 2003 Location: Maryland Posts: 5,985 UserID: 1	Re: Water gun structures The small water gun doesn't need to be complex. I just think something small would be easier to design due to the size and it could be made in one step by the stereolithography machine. PVC doesn't do well for size sadly. If that works I think I might make a cross between the XP 150 and the XP 300 with some improvements on both designs. That would be neat... In other news, I finally got around to posting about my Nerf turret on NerfHaven: http://nerfhaven.com/forums/index.php?showtopic=10684 Normally I'd write more, but I'm pretty tired. __________________ email: ben at sscentral dot org / Forum rules Read this page before emailing me. Do not send me a PM or email with a water gun question if someone else could answer the question. Post at the forums. You will get a response from me along with others' views or ideas. Do not send me a PM or email about reading a certain post unless it's been a few days since you've posted. I try to read every post.

01-31-2008, 04:53 PM	#67
Silence Administrator Join Date: Apr 2006 Location: Virginia Posts: 3,251 UserID: 576	Re: Water gun structures Air pressure finally seems to be working its way into Nerf homemades. Drenchenator's homemade was probably ignored mainly because everybody was obsessed with springs at the time. Good point you made there regarding why you should fire from the barrel at the bottom, not the one at the top. Actually you could calculate the normal force coming from the weight of the barrel, torques, etc. Well, I'm interested to see what you do for the pistol. It sounds like you're heading down the commercial water gun style route. Just make sure you do stress-testing and the like. __________________ Forum Rules

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