Author Topic: .25 cal Disco Pumper Carbine (Read 46493 times))

rsterne · « **Reply #60 on:** October 27, 2012, 11:44:38 PM »

IF that's the one with the extra link and relatively constant force.... they warn against using more than 8 pumps in a 392 or the linkage will buckle....

Bob

PakProtector · « **Reply #61 on:** October 28, 2012, 09:33:01 AM »

Quote from: Pellethuntr on October 27, 2012, 10:51:14 PM

Quote from: PakProtector on October 27, 2012, 10:32:27 PM
Also, just in case you've never seen it, check out the 392 linkage from Airchanic. Site says it is no longer made, but their pump handle pressure v. angle sure looks nice.
cheers,
Douglas

Got a link for that? Google search came up with nothing

Sorry Bob...just ad a frustrating search on 'airchanic'...all the more frustrating 'cause I remembered finding it quickly before...

I forgot the 's' at the end...D-Oh!!! http://www.airchanics.com/

I saw that one with hopes of setting up my son with a pumper he could manage better than the stocker on the Sheridans. In this case more than 8 pumps will not be an issue for a while...

cheers,
Douglas

ten.ring · « **Reply #62 on:** October 28, 2012, 02:09:58 PM »

one of the reasons crosman is unlikely to put one like this on the market is ALL the statements on the forums of how people hate to pump. we are a lazy world. so those of us who love pumpers are far and few between. look at the new webely rebel it is selling at a dismal rate. the fact that it is only .177 most certianly is not helping their sales. pumper people tend to be hunters and .22 works better on a rabbit than .177. i like the flater shooting of the .177 at 12fpe but the .22 rebel should shoot at 15fpe that will flatten it out pritty good.

the linkage on the airchanic does not have any inherent weekness. theirs may be week but it does not need to be. i used a similar sized 4link system to push 600lb pallets sideways on a roller conveyor with no strength issues. it located 300 pallets per day for a year with no failures.

mark
p.s.
i hope lots of you do similar builds and post them in the next few months. i know when i get back to my shop in june what my 1st project will be.

rsterne · « **Reply #63 on:** October 28, 2012, 05:19:17 PM »

that link doesn't work.... and I would like to view a diagram of the pump in an FX Indy.... Let's try this....

http://users.snip.net/mogul/Air/FXIndyPumpRebuild/FxIndyPumpRebuild-2.pdf

Bob

john · « **Reply #64 on:** October 28, 2012, 05:22:17 PM »

http://www.network54.com/Forum/79537/message/1209784256/FX+pump+take+down+---+Keyrigger+or+others+may+be+able+to+help---------

rsterne · « **Reply #65 on:** October 28, 2012, 05:34:49 PM »

John.... that second diagram is for an FX Stirrup Pump, not the onboard pump for the FX Independence.... The link in my previous post works....

Bob

john · « **Reply #66 on:** October 28, 2012, 05:38:30 PM »

Sorry, I'm confused...snafu...

rsterne · « **Reply #67 on:** October 28, 2012, 05:53:01 PM »

OK, so here is what I got from that rebuild article on the FX Indy pump.... It appears to be a 3-stage design.... The 1st and 3rd (high pressure) stages look like they work when the lever is returned to it's stored position.... The second stage appears to work in the opposite direction, ie on the "out" stroke.... I haven't figured out all the details, but that's what I see, anyway.... If anyone figures it differently, please let us know....

Bob

rsterne · « **Reply #68 on:** November 07, 2012, 10:34:21 PM »

I had a chance to get outside and sight the rifle in today.... It shoots quite a few pellets well, but prefers JSB Kings and Polymag Predators.... This is the first gun I have that really like the Preds.... Here is a 3-shot group from the bench at 35 yards....

The third shot of the three shot string is consistently the lowest of the three, but when the groups are this small, who cares.... At this range the remaining energy is about 22-25 FPE depending on pellet choice.... which combined with the massive whack from a .25 cal pellet should be just the ticket for hunting....

Bob

bradyman1 · « **Reply #69 on:** November 07, 2012, 11:30:00 PM »

Awesome project, great execution, and what a wonderful group! Awesome job Bob!

Mark Ward · « **Reply #70 on:** August 20, 2014, 07:25:54 PM »

Awsome job Bob i would like one in a .20 or .22 cal

Tommy · « **Reply #71 on:** August 20, 2014, 08:29:02 PM »

WOW!!!!!

Tommy

bbv13 · « **Reply #72 on:** August 20, 2014, 10:54:23 PM »

Fascinating thread and a completely awesome build. I love pumpers and I cant believe I missed this thread until tonight.

Very nice and a great looking rifle.

Bryan

rsterne · « **Reply #73 on:** August 20, 2014, 11:00:41 PM »

This is now old news.... Here is what it turned into.... http://www.gatewaytoairguns.org/GTA/index.php?topic=39328.

Bob

bbv13 · « **Reply #74 on:** August 20, 2014, 11:39:28 PM »

That's just awesome

and a beautiful rifle.

I hadn't joined the GTA when the first thread started so that's why I missed it but I have no excuse for the second thread.

There's no good reason for rifles like the two you designed not to be in production.

Bryan

K.O. · « **Reply #75 on:** August 21, 2014, 01:55:23 PM »

Quote from: rsterne on August 20, 2014, 11:00:41 PM

This is now old news.... Here is what it turned into.... http://www.gatewaytoairguns.org/GTA/index.php?topic=39328.

Bob

Bob it may be old news but is still Inspiring...

And I do not get why they are not building them either, springers sell for about what it would go for, are they afraid of loosing PCP sales?

rsterne · « **Reply #76 on:** August 21, 2014, 02:04:05 PM »

It's interesting that the Carbine can be built with nearly all Crosman/Benji parts, and the Millenium Pumper just needs a beefier linkage and a separate check valve.... I suspect the biggest problem is corporate inertia, plus maybe the fact that as a society we are getting lazier and pumping gets old, fast, for many people....

Bob

Rivers3Plinker · « **Reply #77 on:** August 21, 2014, 03:50:20 PM »

Quote from: rsterne on August 21, 2014, 02:04:05 PM

It's interesting that the Carbine can be built with nearly all Crosman/Benji parts, and the Millenium Pumper just needs a beefier linkage and a separate check valve.... I suspect the biggest problem is corporate inertia, plus maybe the fact that as a society we are getting lazier and pumping gets old, fast, for many people....

Bob

Bob I'm impressed with your engineering and work involved. You must be an engineer someplace. Love the data plots you've posted too.

Crosman marketing is the obstacle to production of a gun like this in my opinion. Plus it might cut into sales of existing guns in ways they don't want.
I think it sits between the 392 and a Disco and they probably don't see a niche for it even if their engineers were to see it and fall in love with the idea. Perhaps a small vendor here would be willing to work with you and produce limited production of these much like the disco double. Might make a nice bit of revenue for you.

Another idea just came to mind when talking about lazy folks, and that's the other folks who like to exercise.
Not trying to thread jack but here's my idea.

Imagine an exercise machine that's also an airgun pump.
I mean the hand pumps for Disco and Mrod are a pretty decent workout from what I hear anyway, but if they could adapt it to a machine like a Bowflex or something, that would be pretty cool, especially with a reservoir tank option.
Hook your tank or your gun to a hose on the workout machine and start your workout. At the end of the session you have a fully charged gun and/or tank and can enjoy some fruits from your labor beyond improved health and muscle tone!

Maybe this could be your next engineering project Bob?

K.O. · « **Reply #78 on:** August 21, 2014, 04:02:17 PM »

" Imagine an exercise machine that's also an airgun pump.
I mean the hand pumps for Disco and Mrod are a pretty decent workout from what I hear anyway, but if they could adapt it to a machine like a Bowflex or something, that would be pretty cool, especially with a reservoir tank option.
Hook your tank or your gun to a hose on the workout machine and start your workout. At the end of the session you have a fully charged gun and/or tank and can enjoy some fruits from your labor beyond improved health and muscle tone!

Maybe this could be your next engineering project Bob? "

I think a stair stepper or stationary bike would be the thing... Call it P-rod X fitness system or Shooting Fit X...

rsterne · « **Reply #79 on:** August 21, 2014, 07:53:40 PM »

If Crosman would build it, I wouldn't expect a dime, just my contribution to airgunning....

No time to build an exercise machine, thanks.... even though I need one !!!

Bob

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.25 cal Disco Pumper Carbine

Author Topic: .25 cal Disco Pumper Carbine (Read 46493 times))

ten.ring