I can't get pics in a pm, so this is for you, gippetto....and whoever else

[antithesis]

A rare hipac qc anomaly I guess🙄. ..the light and a few nicks may make it look a tiny bit off in the pic, but sure as shoot it fits better than the side that was meant to

[Gippeto]

One clear picture out of three? lol

Like I said, none of the hipacs I have will thread into a disco tube the way yours apparently will.

Like I also said...be VERY sure of the thread fit up...if it's "good" then happy days...but if it's not "right", this WILL end badly.

Don't take chances if it's not right...it might not be you that gets hurt.

I won't mention it again...just had to get that off my chest.

Al

[antithesis]

One clear picture out of three? lol

Like I said, none of the hipacs I have will thread into a disco tube the way yours apparently will.

Like I also said...be VERY sure of the thread fit up...if it's "good" then happy days...but if it's not "right", this WILL end badly.

Don't take chances if it's not right...it might not be you that gets hurt.

I won't mention it again...just had to get that off my chest.

Al

As good as my phone got....and I do appreciate the concern, a true brother you are.   BELIEVE ME when I say that the fact that this is a manufacturing error makes me approach this with huge caution, I absolutely am hydroing it to at least 4k, asked Lloyd about the best way to home brew a pressure test and following it to the tee when nobody is home.   Bad goes to worse I will send pics of the brake fluid all over my basement lol..

If there is anything else I can do to reinforce it I'm all ears, but again I'm only trying because this tube actually threads together better than my ACTUAL hipac unit

Allow me to make a disclaimer now .  Under NO CIRCUMSTANCES do I recommend anybody take these chances based on a lucky manufacturing error....and do know that I am more brash than most, and hydro testing to boot.  I would never have made this piece public, but I wanted Al to see

[Rob M]

its gonna be interesting to see how fast the hipac goes over the chrony (-;

[antithesis]

its gonna be interesting to see how fast the hipac goes over the chrony (-;

Yes. Actually folks, I am building a dump valve 22xx tube launcher😆😆

[Rob M]

my guess is 120 fpe 

[antithesis]

my guess is 120 fpe 

With which projectile, the tube or my arm from shoulder down?😆

With the ol Caldwell, I might have to try twice to get a good reading

[antithesis]

It doesn't by any means mean it's safe, but these things are spot on...

[Rob M]

just dont forget to wear PPE when you fill it the first time

download by murphyrobert9, on Flickr

[Rob M]

all kidding aside , i dont know waht the current plan is.. I liked the old one we came up with the gauge block acting as the rear plug for the secondard tube below the non load bearing primary tube with the dummy installed.

[antithesis]

all kidding aside , i dont know waht the current plan is.. I liked the old one we came up with the gauge block acting as the rear plug for the secondard tube below the non load bearing primary tube with the dummy installed.

Oh that's still a go, Lloyd said he got me on the bands for it, so I'm basically stalling until he has time to send em...he also may have a spare tube too, so I'm waiting patiently now.  With all the extra parts some of you guys sent me for that project,  I've got projects for the next year...

[Rob M]

sounds good..i actually think the 2240/2250 double tube is a cool idea.

[antithesis]

sounds good..i actually think the 2240/2250 double tube is a cool idea.

Oh me too....I discovered this little surprise and figured I'll use another tube...and not sure how long to make it or which tube to use.   I want to make everything just so ...only definite is a 2250 main so far....I'll get off my Duff and get on it I promise

[rsterne]

I'm tempted to tell you not to bring that into the workshop.... *eyeroll*

Seriously, if you don't know the threads and whether or not they are within proper tolerance, don't use it.... Where do the O-rings go that seal it?.... Please tell me they don't sit in those grooves next to the flange in the center, and that the threads are pressurized?....

One problem with Hydrotesting as you suggest is that it may survive the 4000 psi (once), but be weakened to the point that repeated uses of half that will cause it to fail....

Bob

[antithesis]

I'm tempted to tell you not to bring that into the workshop.... *eyeroll*

Seriously, if you don't know the threads and whether or not they are within proper tolerance, don't use it.... Where do the O-rings go that seal it?.... Please tell me they don't sit in those grooves next to the flange in the center, and that the threads are pressurized?....

One problem with Hydrotesting as you suggest is that it may survive the 4000 psi (once), but be weakened to the point that repeated uses of half that will cause it to fail....

Bob

I had been considering cutting off the excess threads...as well as discussing alternative means of sealing, I know the threads over an o ring ain't cutting it.

Again I don't want anyone to think I take the proposition lightly, and odds are the thing will never see the light of day. Not do I consider hipacs to be a shining example of safety.

All I can say is I'll shelf this one for a little bit until I determine exact threading dimensions,  but all I can say is at face value, if a cheap hipac extension holds up than if i ditched the extra threads I have no reason to think this has any worse of a chance

[rsterne]

Bear in mind, some HiPacs had a deep O-ring groove combined with a large ID.... which led to a thin wall under the O-ring and insufficient safety margin....

Bob

[antithesis]

Bear in mind, some HiPacs had a deep O-ring groove combined with a large ID.... which led to a thin wall under the O-ring and insufficient safety margin....

Bob

Zero surprise considering the dimensions I HAVE taken on the insert in question...and as a result of popular opinion and your learned discourse, I will henceforth shelf this project until I've taken a few further measurements and established a secondary means of reinforcement.

Again for the record I always knew this idea was questionable at best, but if I'm willing to do the legwork I believe I can make it safely functional, that will take a little more research and I suppose a means of precisely measuring the threads.

I had never intended to make this public for the sake of both the backlash and because I don't want any of my brothers in air to get the idea that this is anything to trifle with ..on that note, should it please the court, mods may kindly delete this thread

[rsterne]

Naw, I think we've hassled you enough.... Just be careful, is all....

Bob

[antithesis]

Well folks, turns out to be a moot point...

This is the only tube end I have with enough capacity to be worth using on my little double tube project, which Im still putting some final considerations into so I don't tear apart all these good parts for nothing...

I wanted to cut the usable length off of a 2250 tube that I trashed last year trying to locate holes for pinning....that plan, as it turns out, would leave me with a dismal amount of air to work with, so this is likely going to become a carbine project...and the tube in question is the only donor tube I have.

The hipac insert will live to inspire questionable mods another day.