Disco double air tube - improved version - opinions wanted

[grumpy]

Zero man. If it involves wood skills, count me out. I cant make a straight cut on wood to save my life.
 
[/quote]
Come on Grumpy,  absolutely ZERO woodworking skills???  Can ya whittle a tooth pick? Seriously, what Mike says is right. 
Also, I am getting a website set up that will have some do-it-yourself videos of the install and stock modification.  Plus there are some folks on this forum that I bet will be happy to offer the service of doing the stock mods for people.
Lloyd
[/quote]

[tkerrigan]

Just use a 13XX or 22XX pistol action and a Crosman plastic carbine stock.  The lower tube would help make the pressure gauge look better.  A forestock could be mounted to the new tube clamp.  Regards, Tom

[lloyd-ss]

I worked on the QB78 stock and routed out the inside to accept the Disco action.  At 5/8" wide, the disco trigger is wider than the QB78 so that worked out fine.  The slot was about 1/4" too long, but is ok.
I just slipped the Disco Double parts into the freshly routed stock to see how they might look.  The stainless tube showing thru the peek-a-boo slots in the stock look pretty cool, I think. 

QB78 stock fully routed for a Disco action.


This shows how the slot for the tube has to be 7/8" deeper than standard.
Both tubes are 7/8" diameter.


Disco Double tube kit in a QB78 target stock.
The front ends of the tubes would normally be even, not stepped.
The barrel band will be different, too.

[ericclarkbandit]

I now believe I need one of these kits.  Let us know when you start shipping them.

Eric

[rsterne]

Looks nice.... Gauge on the front of the tube?....

Bob

[lloyd-ss]

Looks nice.... Gauge on the front of the tube?....

Bob

Bob,  Normally the gauge would stay unchanged in its original location on the main tube, thru the hole in the stock.  Because this stock had open slots in it, I thought bringing the new tube all the back past all the cutouts would look better.  In this case I would probably move the gauge to the side of the lower tube, but out very near the front.  I want it visible when filling, but not in the way or vulnerable.
Lloyd

[lloyd-ss]

I now believe I need one of these kits.  Let us know when you start shipping them.

Eric

Eric,
I have added you to my list and will PM you when I have the info website about it up and running.
Lloyd

[rsterne]

Makes sense.... I forgot that the gauge was mounted in the upper tube.... Could you mount if in the lower tube (usual location) but without an adapter?....

Bob

[lloyd-ss]

Makes sense.... I forgot that the gauge was mounted in the upper tube.... Could you mount if in the lower tube (usual location) but without an adapter?....

Bob

Yes, you could, but then you'd have to plug the original hole in the main tube. The plug for the lower tube could stick out from the back end of the tube by 5/8" or so and then could have a tapped hole to accept the gage.

[rsterne]

Ahhhhhhhh.... enter the extended valve front end which covers the gauge port in the tube and allows more airflow into the valve like I did on my .308/9mm build.... 

Bob

[lloyd-ss]

Yes, excellent!  Lets see, doing it that way would give you  a better flowing valve, and also allow the lower tube to come back another inch and half or two to get a little more air volume.  Definitely for a Power Gun!
Bob, have you looked inside an Mrod valve for power mod options?  Disco valve is .75 O.D., Mrod is 1.00.  That's 78% more cross section. Hmmm...... sorry....... temporary diversion.... one thing at a time.
Lloyd

[aack73]

looks really cool lloyd. i'm sure many will like the added air.  and the overall look of the gun and design looks nice.

[MustangMike]

lloyd

ur not helping me to keep focused on one project.. im tempted to start pondering a 25 disco, ur dual tube kit just opens to whole door to a world of projects that on the norm wouldnt be able to be done becuase the amount it would cost to have some do custom work like this. you are paving the way for awhole new level of airgunning

must stay focused on current project. just gotta keep telling myself that..now if i could just get the darn invoice for a certain part so i can pay for it and get it in my hands.....

[lloyd-ss]

lloyd

ur not helping me to keep focused on one project.. im tempted to start pondering a 25 disco, ur dual tube kit just opens to whole door to a world of projects that on the norm wouldnt be able to be done becuase the amount it would cost to have some do custom work like this. you are paving the way for awhole new level of airgunning

must stay focused on current project. just gotta keep telling myself that..now if i could just get the darn invoice for a certain part so i can pay for it and get it in my hands.....

Mike,
I agree, it is hard to stay focused on one project because of all the great ideas we see on this forum.  The projects do take on an organic nature and change and evolve  from their original concept.  But I think they usually end up better because of it... or at least different.
Lloyd

[MustangMike]

lloyd
that is very very true, but as they evolve they are refined into safer better projects that end up as a finished product with most of the bugs worked out.. ive gone over my build so many times and it is very awesome to have a set course nailed down.

i think ur going to make a pretty penny or 2 with these dual airtube kits, but it will also allow others in the airgun world to see things they hadnt thought of. thus the evolution continues and it can only get better.. as i said i think you have paved the way for awhole new level for the airgun world.

[lloyd-ss]

Just use a 13XX or 22XX pistol action and a Crosman plastic carbine stock.  The lower tube would help make the pressure gauge look better.  A forestock could be mounted to the new tube clamp.  Regards, Tom

Tom, are you describing a skeletonized airgun where instead of the tubes and action being cradled in the stock, you have a more minimalist group of parts attached to the action?  Like a pack rifle with only enough "shaped " parts to give you something to grip? 
I have wondered about the feasibility of a gun where there was a structural air tube that went almost from the muzzle all the way back to the butt, with a few slight contouring bends around the grip or cheek piece.  It could have tremendous volume and still be fairly light weight. Using the normally accepted DOM hydraulic tubing would allow for some mild sculpting of the frame.
Lloyd

[lloyd-ss]

lloyd
that is very very true, but as they evolve they are refined into safer better projects that end up as a finished product with most of the bugs worked out.. ive gone over my build so many times and it is very awesome to have a set course nailed down.

i think ur going to make a pretty penny or 2 with these dual airtube kits, but it will also allow others in the airgun world to see things they hadnt thought of. thus the evolution continues and it can only get better.. as i said i think you have paved the way for awhole new level for the airgun world.

Mike, thank you for the kind words.  I do appreciate them.
I always seem to be in the "development mode" and finalizing an airgun concept into a finished and executed and "pretty" design is something I don't do very often.  I will have to get that satisfaction vicariously from the members with the creative and artistic ability to complete an attractive and balanced design.  I think you have something coming along that will fill the bill.
Lloyd 

[rsterne]

I have a brand new .25 cal MRod valve, plus a poppet, sitting on my bench, I ordered them because I figured that it just MUST be better than a Disco valve.... Well, the exhaust port is TINY compared to a Disco, and so is the poppet.... so much so that I haven't even taken it apart to see what I could do with it.... I was thinking I might be able to borrow something for my Hayabusa project but I sincerely doubt it....

I guess with 3000 psi available instead of 2000, Crosman decided they could get all the performance they needed without flowing much air.... It's interesting we see so little about hogging out MRod parts to increase the performance, isn't it?.... One thing I can see is that the wall of the valve is very thick because of location of the side mounting screws for the breech.... I guess one of these days I will get over my disappointment and actually pull the valve apart and measure it up.... 

Bob

[MustangMike]

lloyd
that is very very true, but as they evolve they are refined into safer better projects that end up as a finished product with most of the bugs worked out.. ive gone over my build so many times and it is very awesome to have a set course nailed down.

i think ur going to make a pretty penny or 2 with these dual airtube kits, but it will also allow others in the airgun world to see things they hadnt thought of. thus the evolution continues and it can only get better.. as i said i think you have paved the way for awhole new level for the airgun world.

Mike, thank you for the kind words.  I do appreciate them.
I always seem to be in the "development mode" and finalizing an airgun concept into a finished and executed and "pretty" design is something I don't do very often.  I will have to get that satisfaction vicariously from the members with the creative and artistic ability to complete an attractive and balanced design.  I think you have something coming along that will fill the bill.
Lloyd 

ya there is a little something something in the works..lol..

like i said on the phone that night, i can look at a car for 10 seconds and then tell you what i would do to make it look like a show car. but i cannot for the life of me pick out clothes that make me look good.. we all have the things were good at, its when people come together with their own design skills that the magic really happens..

its eating at me not sharing the details of the project. but when its done it will be a show stopper

[Rescue35]

It's interesting we see so little about hogging out MRod parts to increase the performance, isn't it?.... One thing I can see is that the wall of the valve is very thick because of location of the side mounting screws for the breech.... 

Bob

I think a lot of it is the cost of the Mrod plus the fact that it does so well out of the box. The disco is more abundant and easier to experiment on.