16 replies to this topic

[Vintage]

I posted my homemade that resembled the P90 over at NHQ, but I thought I should put it here as well. This is my working P90:



It gets around 120 feet angled (around 95 feet flat) with a brass barrel. I am currently working on a different brass setup to improve range now.

The main thing that I was not satisfied with was the angle of the stock. Now, I am almost ready to start building a new P90, that will use two hose handles to correct the angle problem, and give me a semi-auto design at the same time.

Here are my latest plans:



The bike pump can handle pressure up to 90 PSI, so I should get good regulation. It came with a short cord that I will use to connect it to the tire valve. The pump will be mounted along the bottom pipe facing forward. The pump handle will be operated at the front of the gun.

I would like feedback concerning the overall look of the gun, and the ergonomics of the pump location.

~Vintage

[CustomSnake202]

I think that the first design is pretty sweet. There's not too many couplers involved and it looks sturdy. The second design looks a little more bulky, especially with the two hose sprayers. But that's only my opinion. Just go with what is more comfortable for you, but I would go small.

[GeneralPrimevil]

Very nice job. Two wings up.

I love the first design: the one that's made. If you don't mind, I will be making one close to it, but not the same. It will be semiautoish, using a ballvalve as the second hose handle. That way, it would be small, yet have a fast ROF, a militiaman's dream. I also would have the top rail lower, even though it takes a bit away from the realism.

[rawray7]

try using one or two 45* PVC couplers. it will make up for most of the angle problem, from the looks of your original. no point using two hose handles...especially if you can't lock one open.

[Vintage]

Using two hose handles gives me the perfectly correct angle I need. The other thing it gives me is the semi-auto capability (open first valve/shut first valve/open second valve to fire concept).

Yes, the nozzles can lock open, and I could use that function to waste the rest of the pressure in one final shot.

~Vintage

Edit: Go ahead, GeneralPrimevil. I don't care if you use my idea, as long as you don't go around claiming you made it first.

Edited by Vintage, 07 July 2004 - 09:57 PM.

[NinjZ]

Hes useing two nozzles so they will lineup and make his guns angles line up. In the first it is crooked. His nozzles also hold 90psi, so teh first nozzle fills the second, and the second fires the dart.

EDIT: vintage beat me to it ^--------

Edited by NinjZ, 07 July 2004 - 09:58 PM.

[Langley]

Edited by Langley, 07 July 2004 - 10:03 PM.

[Vintage]

On another note, I am currently brainstorming for ways to attach that front "L" shaped piece.

NinjZ suggested a PVC tee to connect the "L" to the barrel piece and then plugging up the connection.

The Inventor Guy from NHQ suggested a splint of some kind to epoxy it on.

I could use some more ideas, to give me options.

~Vintage

Edit: Ha Ha, great minds think alike. Langley and I were thinking the same thing at the same time.

Edited by Vintage, 08 July 2004 - 11:24 AM.

[Langley]

You don't really need it. you could easily leave it off. It will only mean more fittings. I also think you should try and connect the pump with cable ties or something to the bottom of the gun. If you could keep it off centered and move that pice that just sticks out into the middle so you could hook the pump up to that, pumping would make alot more sense.

[NinjZ]

Takeing the L peace off defeats the purpose of getting the shape and feel of a P90.

[Vintage]

NinjZ, on Jul 7 2004, 10:12 PM, said:

Takeing the L peace off defeats the purpose of getting the shape and feel of a P90.

Well, I already smidged a little with the grip, but I definitely don't want to go wrong on the shape. If I didn't care if it looked like a P90, there are a dozen other ways I could have designed the gun.

~Vintage

[Langley]

What's a P90? Is it some kind of firearm made of pvc and hose nozzles?

Edited by Langley, 07 July 2004 - 10:28 PM.

[Avatar of WoeBrian]

The P90 is a sub-machine gun that has a 50 round clip.


EDIT:P90

Edited by Avatar of Woe(Brian), 07 July 2004 - 10:35 PM.

[okto]

...and will blow holes in the moon. designed as a powerful, but small, accurate weapon for rear-echelon personnel (ammo dump crews, medics, central battlefield comm). designed to be fired slung or from the hip, which explains the funky shape.

anyway, nerf. are you planning to leave it all pipey, or encase it? cos really, the cachet of the p90 is in its one-piece ergonomically molded frame.
also, have you considered battery-powered solenoid valves to give to semi-auto fire? im not sure how this matters in a single-barrel, magazineless weapon, but it would get rid of the awkward dual-sprayer arrangement and give you much more precise bursts of air.

[Vintage]

Dual solenoids is an awesome concept that I did consider, but that adds $22 to the making of the gun. Also, if I ever use that idea, I won't try to smash it all into a P90 size. Solenoids are kinda bulky, so I would use them in a rifle design.

Yes, I might try to fill in the empty spots between pipes, but sometimes piping gives a nice "not-real-but-cool-looking" impression to the thing. When I made my first ball-valve homemade, I used a pile of newpaper to flatten and fill in the gaps. It made the gun very heavy, and required a layer of ugly duct tape. Now, I took off the tape and paper, gave the gun a coat of glossy black, and it looks awesome.

If anyone has ideas for space-filling techniques, I sure could use them. Maybe if I could get some 'spray-insulation' foam stuff that dries stiff enough to bond to the PVC and be painted.

~Vintage

Edit: An idea just hit me! What about cutting those big blocks of styrofoam that come in packaging so that they fit in the gaps?

Edited by Vintage, 08 July 2004 - 08:42 AM.

[GeneralPrimevil]

I was just going to say that. I use styrofoam as a filler in most of my projects. If you cover it with the cardboard from cereal boxes (designs and crap pointing toward the styrofoam), then it can be spraypainted without melting anything.

Instead of having dual solenoids, try to make one with a solenoid/hose handle and a ball valve. That's how I would/will make one of the Vintage P90s. I f you can though, use a trigger style hose handle. I think they are better than the rear levered ones. Try looking in Meijer's gardening section. I always find them there.

[okto]

papier mache, epoxy, wood, theres no end to the meterials you could use
i would use wood, the basswood or birch or whatever you can find in 3" wide bits in almost any craft/hobby store.