XS60C PCP Repeater project

[Buldawg76]

Lloyd
I had no idea the double tubed gun kits had been stalled out for a time as it states here, but glad to see that thing have been worked out to keep them in supply to customers .

Kudos to you both and I am working on a disco based Prod trigger, challenger hammer and RVA franken gun to be a lightweight FT gun and you just gave me an idea od adding the double tube to it to increase shot count with out much extra weight. It would be a 2240 style setup with the 1399 or AR style butt stock and Prod pistol grip assy.

I was going to drill and install 10/32 screws in the valve to be able to fill to 3000 psi safely and would like to know is the disco double kit capable of filling to 3000 psi safely as well.

Please send me a PM when they are back and available for purchase if you would please.

Mike

[lloyd-ss]

Mike,
All of the double tube kits have at least a 3 to 1 safety factor at 3000 psi, so yes, the "kit" is plenty safe.  That includes the tube, the threaded fittings, and all the other hardware pieces included in the kit.  However, the Benjamin Discovery air rifle, from the factory, is only rated to 2000 psi, so it should not be filled above the factory recommendation.  That said, with proper modification of the factory tube and the valve body to use three 10-32x3/16 high strength alloy steel  low profile socket head cap screws, the security of the valve body is improved.  With that modification done, filling above the factory recommended pressure is still a personal decision.
Just for reference, both the Marauder rifle and pistol are rated at 3000 psi from the factory.
Lloyd

[stalwart]

Wow!! Makes me glad I got my gun from him before he got all famous!!! 

Yeah, I'm not sure what to do first.... buy a Maserati, or get extensive, obvious plastic surgery.

Thanks for the words of encouragement, gentleman!
The positive attitude and cooperative spirit of this forum makes success a whole lot more achievable. Eric and I will do our best.
Lloyd

Lloyd has already said it all.

Guys, SA is about to go through some serious changes, including it's location. All efforts here are toward cost effective progress in products and production, and this will be no exception. There are many more announcements coming, believe me...

You have watched SA grow from the seed planted by an unintended sale of a pistol I built for myself (MG 2240) before it was even finished. That $200, as are all proceeds here, still, was turned back into the endeavor... and the rest is, well... history.

Well, well, well... this is GREAT NEWS,  for a couple of different reasons:

1. I've watched how you two engage and support fellow enthusiasts, and I know that both  of you working together will be even more awesome. Much good will come of this.

2. You just made my job a lot easier: I was tasked with recommending an air gun for a cabin at 7500'. Knowing the doubles will be back, I think a Prod will be the best for their needs.

Congratulations!

GTA rocks... and, I can prove it.

[Buldawg76]

Mike,
All of the double tube kits have at least a 3 to 1 safety factor at 3000 psi, so yes, the "kit" is plenty safe.  That includes the tube, the threaded fittings, and all the other hardware pieces included in the kit.  However, the Benjamin Discovery air rifle, from the factory, is only rated to 2000 psi, so it should not be filled above the factory recommendation.  That said, with proper modification of the factory tube and the valve body to use three 10-32x3/16 high strength alloy steel  low profile socket head cap screws, the security of the valve body is improved.  With that modification done, filling above the factory recommended pressure is still a personal decision.
Just for reference, both the Marauder rifle and pistol are rated at 3000 psi from the factory.
Lloyd

Lloyd
Yes the disco valve would be converted to use the same 10-32 screws as the Mrod uses so I would feel safe filling to 3000 psi since the Prod tube is basically a shorter disco tube is it not in that it is the same diameter and wall thickness as a disco tube. ?

I know the Mrod tube is thicker as well as bigger ID/OD so its not truly comparable to the disco/Prods tube IMO. I was just insuring that the disco double kit was intended to be safe at 3000 psi with proper valve mods to the main disco valve and tube.

Thanks for the info so just need to wait for Eric to get it all up and running with kits ready for delivery.

Mike

[RMM]

Hey guys!!  Check this out!!  

[rsterne]

Yes, folks, that's an adjustable regulator.... A little surprise I have been working on behind the scenes with Eric and Lloyd.... It is installed inside the front plug for the upper tube....

Bob

[StevenG]

Care to share the range for which it is adjustable?

[rsterne]

IIRC, about 500-2200 psi, I can't remember what Lloyd ended up with for a final range of adjustment.... The entire upper tube ends up at the output pressure, so it is suitable for lots of power if required....

Bob

[stalwart]

Yes, folks, that's an adjustable regulator.... A little surprise I have been working on behind the scenes with Eric and Lloyd.... It is installed inside the front plug for the upper tube....

Bob

As a matter of fact, this was Bob's idea. A good one... as usual.

[StevenG]

IIRC, about 500-2200 psi, I can't remember what Lloyd ended up with for a final range of adjustment.... The entire upper tube ends up at the output pressure, so it is suitable for lots of power if required....

Bin

Wow!
Stalwart, put me down for one now.

[stalwart]

IIRC, about 500-2200 psi, I can't remember what Lloyd ended up with for a final range of adjustment.... The entire upper tube ends up at the output pressure, so it is suitable for lots of power if required....

Bin

Wow!
Stalwart, put me down for one now.

Done.

[lloyd-ss]

Yes, folks, that's an adjustable regulator.... A little surprise I have been working on behind the scenes with Eric and Lloyd.... It is installed inside the front plug for the upper tube....

Bob

As a matter of fact, this was Bob's idea. A good one... as usual.

Yes, Bob has been after me for a while to put an integral  regulator in the upper fitting of the Disco Double tube setup.  He had the basic design figured out,  and finally, we  put our heads together for the final design, and I built a prototype. It worked well and I had parts manufactured.  RMM is getting the first production unit.

The range of adjustability is 500-2700 psi.  It works equally well with Eric's XS60C  project and with the Disco Double.  Basically, the bottom tube becomes the high pressure reservoir and the upper tube is the regulated side.
LLoyd

[drewciferpike]

I might have just soiled myself... Will this be an option for all double-tube kits, across supported platforms?

[rsterne]

Sorry, I couldn't remember what the upper limit was on the setpoint.... 2700 it is.... *LOL*.... Nice to see this project come to fruition.... *grin*....

Bob

[Buldawg76]

I might have just soiled myself... Will this be an option for all double-tube kits, across supported platforms?

+1 on Drews question as it being an option for the double tube kits and is it also going to be an option to the XS60C PCPs also..

Mike

[lloyd-ss]

Sorry, I couldn't remember what the upper limit was on the setpoint.... 2700 it is.... *LOL*.... Nice to see this project come to fruition.... *grin*....

Bob

Bob, the regulator  has been quite a successful team effort for the 3 of us and and is an indicator of the direction of the upcoming transition.
The pressure range of the production units goes slightly higher (2700 psi) than the prototype (2200 psi) because the batch of  Bellville washers for the production units, although the same nominal thickness as the proto, were slightly stiffer than the proto Bellvilles.   That does however, come with a strong caution that the factory production arrangement of the Discovery is only rated to 2000 psi for the upper tube, and therefore the regulator should be set no higher than the factory recommended 2000 psi unless proper mods are made to the upper tube valve screws.  The Disco Double LOWER tube is rated for 3000 psi, which could allow for quite a bit of extra air in the lower tube.  An upcoming info sheet about the regulator will have recommendations about the applicability and safe use of the regulator.

I might have just soiled myself... Will this be an option for all double-tube kits, across supported platforms?

Drewciferpike, right now this regulator will work with Eric's XS60C project and the Disco Double kits: kits that have a 7/8" O.D. top and bottom tube, with the air transferring between the tubes at the front front end.  It could also be a retrofit for Disco Double kits that are already in the field.  Eric will be gauging the interest of the regulator and whether it is "needed" for other platforms.

Lloyd

[drewciferpike]

I figure the reg + double-tube option is a no-brainer for a Prod...

[farmerjoe99]

First congrats to Eric and Lloyd really excited for you both!

Second excellent idea with the regulator! 
very interested and excited to here more about it.

[rsterne]

Lloyd, I think making them for the PRod Double is a no-brainer.... Is there any change required, or will they be a drop (screw) in?....

Bob

[Buldawg76]

Interested in one for both a disco and XS60C.

Mike