Pump spooler

jhyan · 07-26-2008, 12:19 AM

So, I love my dm6. And I've thought long and hard about how to make a good pump spooler. I couldn't figure out some stuff until I had this epiphany yesterday morning.

So, here is a gif of my thoughts. Imagine, if you will, a pump arm connecting to the thicker part of the bolt. Then imagine the 3-way is a fabco 3-way (normally closed, very light actuation pressure), like the ones used in pneumags.

Okay... who wants to build me one????

p.s. I used the gif of the dm4 that I pulled off of ZDSPB's website... chopped it up real good, but you can see it based off that. Credit is given on his website for the original animation.

Contour · 07-26-2008, 02:28 AM

Wow I love that design, don't have the tools or experience to help with your project though.

BigOldSkool · 07-26-2008, 02:39 AM

wow....

I like....

And your a ram and another three way away from a closed bolt spooler.

russc · 07-26-2008, 04:37 AM

That's actually pretty elegant. Nice job!

Tyler_durden · 07-26-2008, 11:06 AM

could you attach the pump arm to the bolt via the hole in the back cap? Possible threading the tail of the fuse bolt?

jhyan · 07-26-2008, 11:34 AM

Quote:

Originally Posted by Tyler_durden

could you attach the pump arm to the bolt via the hole in the back cap? Possible threading the tail of the fuse bolt?

Thorpydo (sp?) made a pump dm4 by attaching the pump arm to the tail of the fuse bolt and disabling the port on the solenoid that pushed on the front of the sail.

I like my design better, as it is a true closed bolt pump, although his has a slight advantage in that it actually exists *grin*

jhyan · 07-27-2008, 06:08 PM

An explanation I posted on PBN......

The bolt is pumped back by the pump arm, pushing the ummm, lets call it the powertube, back, allowing the dump chamber to fill, and pressurizing the lpr, which in turn, pressurizes the 3-way.

Opening the 3-way allows the Low Pressure air into the can, pushing forward on the sail, overcoming the balanced pressure in the dump chamber (I made sure to make the surface areas in the dump chamber even, to have balanced pressure). When the powertube moves forward, air is released around the stem, flowing through the tip and pushing the ball.

Yes, you could pull the trigger before you get the bolt all the way forward, but you can do that on a sniper as well. Although.... in the more advance drawing of my idea, the pump rod rubs along the top of the trigger. Not until the pump arm gets all the way forward does it allow the trigger to be pulled... thus stopping you from firing until the bolt is set, and creating an autotrigger!

This pump spool is similar to a pump mag, because mags are also spools, just with an inverted tail. This idea of mine differs in that it has a pneumatic trigger which is inactivated until the dump chamber fills. Cool huh?

It's also different than a pump mag in that the bolt would be fully connected to the pump arm. In a pump mag, the pump arm just pushes the bolt back and it resets against the sear (my design has no sear!)... meaning the pump mag is an open bolt pump. You cannot have the mag be a closed bolt pump without serious mods, as the bolt being forward means the valve is open. My two part system allows for a closed bolt spool valve.

noelydeeznutz · 07-27-2008, 07:05 PM

i would do this to my PM6... in a heartbeat... this is an AWESOME idea.

Paintballer50505 · 07-28-2008, 12:20 PM

i really like this it solves all dwell issues using a mechanical three way because of the sealed dump chamber and it solves the issue of the gun firing without it being pumped first. its a very doable design.

only thing i can see is its gonna have a very strange pump stroke because it is gonna be really light then its gonna smack into the "valve" (i guess thats what to call it or powertube like you said earlier)

its a great design but i think you can still simplify it a little bit.

y0da900 · 07-28-2008, 01:48 PM

Very cool concept. I don't see a need for the LPR to be pressurized by the dump chamber, since the spool is neutrally balanced and the rearward forces are provided by the bolt being pumped back. The system should operate as a single shot gun even if the LPR was constantly pressurized.

If you wanted to make a pump DM without modifying the bolt, it could be done much the same way that you make a pump Ion. Have one normally closed 3-way for the pump, another for the trigger. Since the spool is balanced, you should be able to vent the front of the piston (pump stroke) without the gun firing (hence the 3-way).

07-26-2008, 12:19 AM	#1 (permalink)
jhyan Cheffer Join Date: Apr 2006	Pump spooler So, I love my dm6. And I've thought long and hard about how to make a good pump spooler. I couldn't figure out some stuff until I had this epiphany yesterday morning. So, here is a gif of my thoughts. Imagine, if you will, a pump arm connecting to the thicker part of the bolt. Then imagine the 3-way is a fabco 3-way (normally closed, very light actuation pressure), like the ones used in pneumags. Okay... who wants to build me one???? p.s. I used the gif of the dm4 that I pulled off of ZDSPB's website... chopped it up real good, but you can see it based off that. Credit is given on his website for the original animation.

07-26-2008, 02:28 AM	#2 (permalink)
Contour Active Member Join Date: Jun 2007	Wow I love that design, don't have the tools or experience to help with your project though. __________________ ]PB4L Industries Vertebrae Sniper

07-26-2008, 02:39 AM	#3 (permalink)
BigOldSkool MCB Member Join Date: Jul 2006 Location: Deer Park, NY	wow.... I like.... And your a ram and another three way away from a closed bolt spooler. __________________ RIP - Ed "BigDaddy" Roth and "Indian" Larry "Reading APG does not make you an airtech" Wild Geese - Coney Isand White Fish - Brotrocity - ECA BOS's Feedback! What Serial Number Is Your Cocker? WTB

07-27-2008, 07:05 PM	#8 (permalink)
noelydeeznutz Seasoned Member Join Date: Mar 2008	i would do this to my PM6... in a heartbeat... this is an AWESOME idea. __________________ AbsolutePaintball.net ball till you fall SplatterEffectPaintball the ONLY place to shop PM me for feedback links

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

07-26-2008, 11:06 AM	#5 (permalink)
Tyler_durden MCB Member Join Date: Feb 2008	could you attach the pump arm to the bolt via the hole in the back cap? Possible threading the tail of the fuse bolt?

07-27-2008, 06:08 PM	#7 (permalink)
jhyan Cheffer Join Date: Apr 2006	An explanation I posted on PBN...... The bolt is pumped back by the pump arm, pushing the ummm, lets call it the powertube, back, allowing the dump chamber to fill, and pressurizing the lpr, which in turn, pressurizes the 3-way. Opening the 3-way allows the Low Pressure air into the can, pushing forward on the sail, overcoming the balanced pressure in the dump chamber (I made sure to make the surface areas in the dump chamber even, to have balanced pressure). When the powertube moves forward, air is released around the stem, flowing through the tip and pushing the ball. Yes, you could pull the trigger before you get the bolt all the way forward, but you can do that on a sniper as well. Although.... in the more advance drawing of my idea, the pump rod rubs along the top of the trigger. Not until the pump arm gets all the way forward does it allow the trigger to be pulled... thus stopping you from firing until the bolt is set, and creating an autotrigger! This pump spool is similar to a pump mag, because mags are also spools, just with an inverted tail. This idea of mine differs in that it has a pneumatic trigger which is inactivated until the dump chamber fills. Cool huh? It's also different than a pump mag in that the bolt would be fully connected to the pump arm. In a pump mag, the pump arm just pushes the bolt back and it resets against the sear (my design has no sear!)... meaning the pump mag is an open bolt pump. You cannot have the mag be a closed bolt pump without serious mods, as the bolt being forward means the valve is open. My two part system allows for a closed bolt spool valve.

07-28-2008, 12:20 PM	#9 (permalink)
Paintballer50505 Post Whore Join Date: Jul 2007 Location: New Jersey	i really like this it solves all dwell issues using a mechanical three way because of the sealed dump chamber and it solves the issue of the gun firing without it being pumped first. its a very doable design. only thing i can see is its gonna have a very strange pump stroke because it is gonna be really light then its gonna smack into the "valve" (i guess thats what to call it or powertube like you said earlier) its a great design but i think you can still simplify it a little bit.

07-28-2008, 01:48 PM	#10 (permalink)
y0da900 MCB Member Join Date: Oct 2007 Location: Plattsburgh, NY	Very cool concept. I don't see a need for the LPR to be pressurized by the dump chamber, since the spool is neutrally balanced and the rearward forces are provided by the bolt being pumped back. The system should operate as a single shot gun even if the LPR was constantly pressurized. If you wanted to make a pump DM without modifying the bolt, it could be done much the same way that you make a pump Ion. Have one normally closed 3-way for the pump, another for the trigger. Since the spool is balanced, you should be able to vent the front of the piston (pump stroke) without the gun firing (hence the 3-way).