JD-550 "Bullpub" APH

[Justice_Drencher]

this idea came into my head months ago when i was trying to think of a really compact aph that could in theory be duel wielded. that might sound crazy but if an trigger is installed i genuinely believe that this design could be a duel wielded able aph. here's my design https://make.craftyamigo.com/design/Qp3 ... m7QHMeD1Bx. now there are some issues that i could see, number one is that actually hooking up two of these things to a reservoir like a solar shower might be a bit difficult because your working with 2 hoses not one, number two is that due to the short pump volume pumping time might get long, lastly id imagine these things being very "water hungry" which could be an issue. overall though i think that this could be a interesting project to try in the future if i have the time. also if your wondering how i would attach a trigger ,i made a diagram of a homemade pull valve trigger concept that i think would be easy to build using pvc. anyways that's about it would love to hear feedback.

-with excitement

Justice_Drencher

[SSCBen]

Nice 3D model.

Is the idea to connect the pump to your shoulder so that you can pump by moving the blaster forward and backwards? I had a similar idea for a modification to an old foam dart blaster called the Max Shot. It's a neat idea that I'd like to see, so I encourage you to try it.

As for the trigger, Drenchenator tried something similar for a Nerf gun a long time ago. I think if you're limiting it to PVC pipe then it'll probably be too bulky. Something 3D printed might work better, though I'm not sure how 3D printed parts hold up under pressure. You might need to make it very thick to handle the pressure, or maybe consumer 3D printing can't handle the pressure at all.

[Justice_Drencher]

Is the idea to connect the pump to your shoulder so that you can pump by moving the blaster forward and backwards?

yup that's the idea. thought it would make a more ergonomic homemade pumping action. and would double as a shoulder stock. as for the trigger i don't have a 3d printer so i will try to make a pvc version as compact as possible oh yeah and the blaster as well. but ill have to make it first, would you recommend short 3" chambers or 2" as i cant make the chambers too tall as that would make the weight hard on the blaster and on the wrists. anyways thanks for the feedback as always.

-with radiance

Justice_Drencher

[SSCBen]

I would suggest making the chambers swappable by using threaded connections for them. Then if you pick one size and decide the other would work better, you can switch without too much trouble.

[Justice_Drencher]

sounds great.thanks for the reply, seems like my metal pump will be perfect for this homemade. also as of writing this a major water warfare opportunity has come to me, my school hosts a senior assassin at the end of the year with money involved. the format being a 2v2 bracket surely my water warfare background will give me an advantage vs there dollar store squirt guns but i still need to practice and get ready now. lastly i finally after years have gotten discord so i can communicate that was as-well, but ill still mainly use wwn. ok that's about it.

-with seniority

Justice_Drencher

[Drenchenator]

This is an interesting idea. The trigger system is in fact a reversed version of what I used on my Nerf gun a while back, but ultimately both are just versions of a pull valve. I wouldn't use a 3D printed firing valve due to safety concerns, so if you want to build this, I suggest sticking to PVC.

In my own Nerf gun (labeled on the site as a water balloon launcher), I did not put the return spring inside the firing valve. I put it in the back where the piston emerges. That makes it much easier to adjust the strength of the spring and to lubricate the system periodically. If the spring is in the valve, you'll likely be unable to ever replace it, and it will be harder to get all of the parts into the right position. That said, old-school Larami firing valves put the spring inside, but it is possible to open those up if you need to do anything with the spring. This is just something to think about.

[Justice_Drencher]

Thanks for the feedback Lt. Col. Drench. i feel like a trigger module that can be adapted for many homemades would be a big leap forward for not only battle practicality but also the hobby as a whole.i have done some tests with 1/2" check valves and the trigger pull force is not bad at all, however take this with a grain of salt because i have no idea how much force the water pressure will apply. my biggest fear this my design is how it will seal, if there is even a slight leak i fear that will not make this module worth it. as for the springs and stuff. i will be using a pre-made check valve so i will be keeping the spring.now i might have some problems with the trigger itself. what do i mean by this? well if the pump/seal rod is the trigger that would mean i would have to bend the rod into a U shape in order for the trigger to extend to the blaster grip which in my case would be a lot of threaded rod. a solution would be to weld or solder the rod but im not trained in that field yet so that is not currently a option. anyways sorry for the half essay. also maybe someone could answer this question. would a battle practical APH be of interest in this hobby, i see alot of people trying to make a "next gen CPH" but strangely no next gen APH. this is probably because of the pressure drop off but i could be wrong anyways that's about it.

-with great apology's

Justice_Drencher