Author Topic: XS60C PCP Repeater project (Read 456355 times))

Bob K · « **Reply #1260 on:** November 09, 2015, 10:55:00 PM »

That is the one name brand I know of.
Peel and stick.
Quick, easy and reversible.

stalwart · « **Reply #1261 on:** November 09, 2015, 11:39:20 PM »

Quote from: Bob K on November 09, 2015, 10:55:00 PM

That is the one name brand I know of.
Peel and stick.
Quick, easy and reversible.

That's a great idea.

I have to wonder what a small piece inside would do. I bought a stamped SS sink that had a 2" x 2" square on the underside of each bowl, and it sounded like it was a casting... "thunk".

Keep up the good thinking, Bob.... we need all the brains we can get, around here...

stalwart · « **Reply #1262 on:** November 11, 2015, 07:29:17 PM »

Guys... I (we) need to thank some contributors to the cause of destructive hydrotesting of some 60s, to develop a database. They aren't in this for credit... only knowledge, for all of us.

Completely unsolicited, 2 guns (FDPCPs) are coming... and I just got some help procuring the equipment needed (didn't even know it was coming until I checked my PP email, and found it there... marked "For the GTA cause"). A 20K pump is now on it's way.

We're gonna hurt some guns, bad... and learn a lot.

The word "family" is tossed around a lot... Rest assured, guys, this family has your backs.

Bob K · « **Reply #1263 on:** November 11, 2015, 09:53:56 PM »

In job long long ago, I had to make test specimens to be tested to destruction.
The old engineer in charge insisted that dial indicators needed to be used in
conjunction with the strain gauges. Long story short, the strain gauges did not
locate the failure mode, the dial indicators ( which were destroyed) did.
My point, how the test is set up is crucial as the results need to be analyzed
from more that a few view points. Like, is the aluminum receiver swelling
a bit under pressure? Is this "stacking tolerances " in relation to minimum "acceptable" thread depths?
Perhaps a dial indicator on the aluminum receiver during a hydro is possibly
a reasonable idea?
Food for thought.

stalwart · « **Reply #1264 on:** November 12, 2015, 12:04:11 AM »

That is something to think about.

The plan is concentrated more on "when" than "why".... but, there is no reason the pressure couldn't be increased in increments (I planned a slow, steady sadism), and various measurements made. The receiver, at the threads, would be easy to chronicle in the vid. A cheap set of digital calipers could be clamped to it.

Can anyone suggest an easy to learn editing program? The simpler, the better.

stalwart · « **Reply #1265 on:** November 13, 2015, 10:02:51 PM »

I've been asked if I could fit a Hatsan reservoir to a 60.

Anyone know what that would take?

https://www.pyramydair.com/product/hatsan-air-cylinder-fits-hatsan-at44-short-at44pa-hammerli-pneuma?a=4883

rsterne · « **Reply #1266 on:** November 13, 2015, 10:15:15 PM »

The valve is in the reservoir in the Hatsans.... I don't know how you would accomplish that.... If you just wanted to use the reservoir, with no valve, and have it removable (when empty) you could probably machine a sleeve that you pin into the 60 receiver and that has threads to accept the valve threads from the Hatsan (with the guts removed).... I think the OD would hit the barrel, if you didn't lower the C/L, however.... I can measure the OD of the one on an AT-44 if you wish....

Bob

stalwart · « **Reply #1267 on:** November 13, 2015, 10:17:56 PM »

Please do. This guy wants a special 60... and I want to build it.

rsterne · « **Reply #1268 on:** November 13, 2015, 11:03:54 PM »

The AT-44 reservoir is 31mm OD.... The valve threads are 18mm x something (1.5mm?).... With the C/L of the Hatsan reservoir lined up with the C/L of the 60 receiver, it hits the barrel....

Bob

stalwart · « **Reply #1269 on:** November 13, 2015, 11:10:30 PM »

Thank you.

Bob K · « **Reply #1270 on:** December 02, 2015, 12:01:22 AM »

After a visual inspection, I pumped my rifle up to 1500 psi ( my usual)
and shot a consistent 20 shot string at 14 paces ( my usual).
A bit high for the first 5 shot and a bit low for the last 5 shots ( my usual)
I really enjoyed shooting this rifle , as usual.
I believe I will do it again.
As usual.

stalwart · « **Reply #1271 on:** December 22, 2015, 11:29:05 AM »

The last part needed to set up the DT rig is due tomorrow.

Is there any reason I couldn't use water in this, as long as I flush with oil before storing?

rsterne · « **Reply #1272 on:** December 22, 2015, 12:38:49 PM »

You can use water, AFAIK, but thorough cleaning is a given afterwards.... You can use alcohol or acetone to absorb water, but it would probably destroy the O-rings / seals....

Bob

stalwart · « **Reply #1273 on:** December 22, 2015, 01:08:34 PM »

Cool. I don't see this thing seeing much use (I sure hope), so, I'll just dry it all out and replace the fluid for storage.

Steven G is going to do the editing, etc. on the vids, so they shouldn't be painful to watch.

This might actually work!

Gertrude · « **Reply #1274 on:** December 22, 2015, 01:34:59 PM »

Eric, I enjoyed our chat last night

I'm very happy to see this is getting close to testing time.
looking forward to the results, as well as "The Movie", haha.
I May have a couple of short Factory XS60c tubes that I'd be willing to send, if you think it would benefit the testing/pretesting in any way ?

Also, don't sell the testing rig short after the FD testing project is complete.
I'd be VERY interested in some burst testing done on some 22XX tubes, set up in different sealing configurations.

Carry on Captain('s) !
I'm confident this mission will be a success !

Sfttailrdr46 · « **Reply #1275 on:** December 22, 2015, 02:10:04 PM »

I hope that at least one of the burst tests will be on a unit with marginal thread material so we can see at what pressure a poorly made unit can be expected to fail

stalwart · « **Reply #1276 on:** December 22, 2015, 02:10:56 PM »

Likewise, Ron. As always.

Bring 'em ON! We'll blow 'em up.

Knowing I won't be mopping up oil makes it easier to imagine doing plenty of tests... and, given the help I got covering the cost of the rig, it's not like I'd have to charge a ton to break even (thanks, unsolicited benefactor!).

If you want to send the tubes, do so. I have a couple receivers that I can't use (proto/mistakes) that could be used to make failure prone examples, for educational purposes.

Sfttailrdr46 · « **Reply #1277 on:** December 22, 2015, 02:13:27 PM »

That is what we need to see because we can safely assume that those that are well within safety specs will not be hazardous to your health unless severely abused

stalwart · « **Reply #1278 on:** December 22, 2015, 02:34:44 PM »

Don, it will happen.

The pile of test subjects is growing.

Gertrude · « **Reply #1279 on:** December 22, 2015, 02:41:59 PM »

Well as it turns out, after speaking with my buddy Jeff, we have a few of the short factory Xisico XS60c tubes we can spare,...
... as well as an extra receiver too !... (providing this receiver will be suitable the test).

It is one that sometime back, we used as a test unit, we attempted to machine on to do our own repeaters. (I think Jeff went a little too deep on it or something). So, we never tried it on our "good" rifles.

Either way, it didn't work for what we were trying, but the lower threaded reservoir hole is unmolested, and should still be ok for the boom-boom test I think.

I'll get it from him in the next couple of days, and send it along with 3 or 4 short tubes.

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XS60C PCP Repeater project

Author Topic: XS60C PCP Repeater project (Read 456355 times))