Next time, a sturdier shroud end cap

[lloyd-ss]

I was trying to max out some velocities and ended blowing the end cap out of my shroud.  I remember arguing with myself about whether it really needed a 4th screw.  I guess it did.   







This last pic shows the path the endcap took across the chrony and into the bullet trap 20 feet away.   
The bullet passed cleanly through the cap, the air just blew it out.

[gene_sc]

Wow Lloyd what kind of velocities you shootin bro...  I want to come visit you and your shop... Lots of neat stuff in there..

[lloyd-ss]

Gene,
I'm always ready for airgun visitors!
The shot that did it was  9mm, 145 gn, 951 fps, 2650psi.  That's certainly not the first time I sent something inappropriate across the chrony.
Lloyd

[gamo2hammerli]

Wow....and that was a nice looking shroud too.

[bluzjamer]

You shroud a done it!

I couldn't help it.....hehehehe!

[lloyd-ss]

Wow....and that was a nice looking shroud too.

But ya know, it was awfully long.  I guess i can shorten it this weekend and put that 4th screw in.

[gene_sc]

You got room for a cot in the shop...

Gene,
I'm always ready for airgun visitors!
The shot that did it was  9mm, 145 gn, 951 fps, 2650psi.  That's certainly not the first time I sent something inappropriate across the chrony.
Lloyd

[lloyd-ss]

You got room for a cot in the shop...

Gene,
I'm always ready for airgun visitors!
The shot that did it was  9mm, 145 gn, 951 fps, 2650psi.  That's certainly not the first time I sent something inappropriate across the chrony.
Lloyd

Gene,
Definitely!  Bring knowledge and ideas!
Lloyd

[Rescue35]

In addition to the fourth srew you may want to leave additional material between the screw holes and the bore end of the shroud. Should make it stronger especially if you don't have the option of having thicker material.

[shadow]

Yikes ....sorry about the cat honey wrong place wrong time hehe. Have you thought about threading the cap there to give it more bite. Ed

[dk1677]

Wow yes that sure took it out! 

[lloyd-ss]

In addition to the fourth srew you may want to leave additional material between the screw holes and the bore end of the shroud. Should make it stronger especially if you don't have the option of having thicker material.

The endcap has a little flange on it that bottoms out on the end of the tube.  I'm going to machine the flange off so I can slip the cap up inside the tube a little to give more meat like you suggested.
=============

Yikes ....sorry about the cat honey wrong place wrong time hehe. Have you thought about threading the cap there to give it more bite. Ed

Yes, a serious rock chunker! Taking out squirrels with rocks??

The tube OD on this shroud is 1.25 and won't fit thru the headstock in my lathe to thread the ID.  I've threaded my 1" shrouds like that and it certainly is a whole lot better.  Putting the thin sections of metal in shear like the broken one  is always a little iffy, but this damage surprised me.
Lloyd

[Brushy Bill]

Lloyd, we just cant take you anywhere can we?
Can't leave you at home by yourself either.  
What are we gonna do?

EDIT:

I remember arguing with myself about whether it really needed a 4th screw.

I remember hearing it is alright if a you talk to yourself
as long as you don't get into any arguments. 

[Rescue35]

This is exactly why every man needs a man cave. You never can tell when one of our routine experiments might turn into some interesting destructive testing

[aack73]

This is exactly why every man needs a man cave. You never can tell when one of our routine experiments might turn into some interesting destructive testing

Amen!  

[lloyd-ss]

This is exactly why every man needs a man cave. You never can tell when one of our routine experiments might turn into some interesting destructive testing

Amen!   

I bet we all have some stories to tell !