[CONCEPT] Homemade Longshot-ish blaster - Seeking input/advice

So after seeing that guys home made longshot on nerf haven i figured i could build that, being stuck with bordem while i way for my uni results come in i decided to try and whip something up.

Dimensions are totally inaccurate. After some advice ill re-model it in inventor after this weekend when i go see what's available to me. Then I'll have some

I plan to use polycarbonate,perspex or maybe even aluminium though it might end up too heavy, probably perspex for the first build as it will be cheaper though in the sizes it will be cut it should be strong enough, but we'll see.

It will have a bath plug plunger, brass breech and accept nerf clips. Most of the stuff looks floating in the pics as i was too lazy to attach it but you can image where the spacers and bolts will be. I'm not entirely sure on how ill do the pump action need to put some more thought into it, any suggestions?



Here's what it will basically look like



Here is the plunger, tube and catch assembly in a cut away so you can see, like the nerf haven blaster the whole plunger tube will move backwards



Once the plunger rod goes back far enough it will engage the catch, i did ring style catch ring



Close up of the catch ring



The trigger i sthe same as the long shots, it will move backwards and that will lift the catch up releasing the plunger rod





Here is what i planned for the shot gun grip, connect straight to the plunger tube



This is how i plan to keep the plunger tube attached, it will run on some rail type things.


If anyone has any suggestions on improvements it would be great, im still a noob to nerf so im sure some things could of been done better.

Thanks

Wow, this is one awesome looking blaster already, one day my skills will be as awesome as yours... and it looks like it will come up with few seal problems, you only need to worry about the breach, and the plunger head, once you have tweaked them to your liking, you will be set
after buggering about with the catch, and actually building the thing of course)

I'm currently designing something similar (although more designed for use as a full-length rifle as opposed to a carbine). Consequently, I'll be following your work closely.

So i went over it and did things closer to scale, ill get some materials in a couple weeks.

The back part will be some kind firm foam so the handles are comfortable. I still need to work out how to attached the front barrel

natious wrote:Close up of the catch ring

https://i.imgur.com/5J7pS.jpg

The trigger i sthe same as the long shots, it will move backwards and that will lift the catch up releasing the plunger rod

Just thought I'd let you know that in you're first post there is an image that is as url link instead of a image displaying.

natious wrote:So i went over it and did things closer to scale, ill get some materials in a couple weeks.

The back part will be some kind firm foam so the handles are comfortable. I still need to work out how to attached the front barrel

Looks good, can't wait to see a working pro-type of it : )

I went and did some research at bunnings today, the most expensive part will be the polycarbonate but it looks to be enough to make 3 maybe 4 blasters.

I might use a 65mm Plunger tube, that is if i can find a local spring that will be enough, though i could shorten the blaster quite a bit and use a 16kg longshot spring

looks like you've got some pretty decent CAD skills going on there, what program are you using?

natious wrote:I went and did some research at bunnings today, the most expensive part will be the polycarbonate but it looks to be enough to make 3 maybe 4 blasters.

I might use a 65mm Plunger tube, that is if i can find a local spring that will be enough, though i could shorten the blaster quite a bit and use a 16kg longshot spring

They sell polycarb at Bunnings?

natious wrote:I went and did some research at bunnings today, the most expensive part will be the polycarbonate but it looks to be enough to make 3 maybe 4 blasters.

I might use a 65mm Plunger tube, that is if i can find a local spring that will be enough, though i could shorten the blaster quite a bit and use a 16kg longshot spring

Which Bunnings did you see polycarbonate at ? All I can find is Acrylic sheets at the couple near me.

I've seen some in The Altona bunnings, they come in 3mm/6mm of 2.4m2 sheets. They range from 20 to 40 a sheet depending on colour and tint.

cfb_rolley wrote:looks like you've got some pretty decent CAD skills going on there, what program are you using?

Im using Maya, though i just model to scale. I downloaded Inventor thinking the toolset would be similar, and it kinda is so ill give it ago in that. (i do 3d modeling/animation thats why i used maya)

Eclipse wrote:

natious wrote:I went and did some research at bunnings today, the most expensive part will be the polycarbonate but it looks to be enough to make 3 maybe 4 blasters.

I might use a 65mm Plunger tube, that is if i can find a local spring that will be enough, though i could shorten the blaster quite a bit and use a 16kg longshot spring

They sell polycarb at Bunnings?

Yeh the brand is called Sunbright, i think its used for window replacement, comes in 600x900x5mm & 3mm, the 5mm is $56. they also have 400x400x12mm 10mm & 8mm it was $46

lech wrote:

natious wrote:I went and did some research at bunnings today, the most expensive part will be the polycarbonate but it looks to be enough to make 3 maybe 4 blasters.

I might use a 65mm Plunger tube, that is if i can find a local spring that will be enough, though i could shorten the blaster quite a bit and use a 16kg longshot spring

Which Bunnings did you see polycarbonate at ? All I can find is Acrylic sheets at the couple near me.

Corner of cheltenham and springvale road.

natious wrote:

cfb_rolley wrote:looks like you've got some pretty decent CAD skills going on there, what program are you using?

Im using Maya, though i just model to scale. I downloaded Inventor thinking the toolset would be similar, and it kinda is so ill give it ago in that. (i do 3d modeling/animation thats why i used maya)

I've been meaning to get in to maya, but I never really get the time to sit down and try. I use AutoCAD for almost everything and for CNC stuff I just build a 3d model in acad and export to rhino 3d to save it as a .igs file. If you're need any kind of custom precisely machined parts, I suggest doing that and contacting rpworld.net for anyone doing that sort of thing for themselves.

Anyway, back on topic, I think the model looks great. If you have a set of vernier calipers, I would measure the tolerances of sliding rail type things in Nerf blasters, and try and copy those measurements on yours. Great work!

cfb_rolley wrote:

natious wrote:

cfb_rolley wrote:looks like you've got some pretty decent CAD skills going on there, what program are you using?

Im using Maya, though i just model to scale. I downloaded Inventor thinking the toolset would be similar, and it kinda is so ill give it ago in that. (i do 3d modeling/animation thats why i used maya)

I've been meaning to get in to maya, but I never really get the time to sit down and try. I use AutoCAD for almost everything and for CNC stuff I just build a 3d model in acad and export to rhino 3d to save it as a .igs file. If you're need any kind of custom precisely machined parts, I suggest doing that and contacting rpworld.net for anyone doing that sort of thing for themselves.

Anyway, back on topic, I think the model looks great. If you have a set of vernier calipers, I would measure the tolerances of sliding rail type things in Nerf blasters, and try and copy those measurements on yours. Great work!

cool thanks, i want to stray away from custom parts so if its a success other people can make it with ease, yah i have a vernier and most the slides in nerf blasters are around 3mm, but i dont want to buy 2 sheets of polycarbonate.

I still have some things to work out on mounting the barrel and real plunger assembly stuff, though im drawing a blank on doing something that will be easy to create.

If you have any ideas/suggestions it would be helpful, i can upload a .obj if that would help