POP2026 - XEMON's strapon

[XEMON]

Hello y'all,

This my little entry into the pop26


Package received, sorted and kinda cleanend 😅



Budget tracker:
- stock ion barrel from Ben's trailer: $10 ish?
- 3D printed filament: i wont use much, so lets say 1/2 a spool to be overly generous $15

The goal?
strap 2 of them together for a nice over/under double!

Next step: drilling 1 body through

[XEMON]

its at this moment i realized Clearance didnt show up 😒


The solution?
chop the end of the body off till it fit!



Clearance is clearance ...


Drilling the body through:



First layout:

[Calvin]

Sooooo love this. My tool jealousy is intense.

[StaticShocked]

Nice! Over-Under Enmey. Can't wait to see how you pack it all together. Going to be neat.

Clarence seems to miss quite a few days of work. So inconvenient. I have found that no matter what size of a machine you buy, the next job will be to big and wont fit. lol.

[XEMON]

yep 😒
i started on a smaller lathe and im looking at the next one 🤣

I was gonna do it on the mill, but i haven't moved it to the new shop yet ... so lathe only for this one.

[XEMON]

Started to dig around the pile'o'fittings and found this little tee, still need to figure something out for the main air ... Might have to make a custom one ...



And went through the box'o'clamp and found 2 used stainless beefy clamp, so it's due for another mandatory layout

[OpusX]

Two markers at the same time...

[XEMON]

Good news!
I found a tool fairly obscure and forgotten by everyone other than old machinists and hobby makers: the tailstock center drilling fixture!
I knew I had one ... somewhere ... and I found it 🥳

So now I can finish this build without the mill 😅

[StaticShocked]

"the tailstock center drilling fixture", I am trying to picture what this is but i am failing. I keep picturing a drill chuck in the tail stock but i have a feeling it's not that. Drill spindle for the tool post for drilling holes off-center?

[XEMON]

A lathe have a thing that spin, and a thing that's fixed, traditionally, the part is stuck to the thing that spin ... but it doesn't have to be that way 😁
Lathe are the most versatile tools in teh machine shop, you can do anything with a lathe!

ill post picture when i have it in there 👍

[Rainmaker]

Yesss! this is gonna be so slick! looking good, ma dude!

[XEMON]

Got the ports drilles yesterday.

StaticShocked here is a good picture of the tailstock center drilling fixture, its a vee block aligned with the axis of the lathe. you can clamp the part in it, ensuring the drilling is done on center.
For this, i need the outlet port exactly over the inlet, so i put a bolt in the inlet, hold the bolt in teh chuck and do a hand over and drill through:









The fitting are too large to fit in between, so the front port need to be relocated.
Made a plug and used teh same technique as before to drill and to teh new port





Left to do:
- custom fitting to connect the 2 bodies
- assembly
- test
- use it in game 😁

[StaticShocked]

Thats a very handy piece of tooling! I have never seen one before and will have to keep my eye out at used tool sales. I have probably seen one but didnt know what it was. Thanks for showing it!

[XEMON]

they're a bit old school nowadays and a relic of the olden days where mills, specially smaller ones, were not available and the only tool in the home shop was a lathe.
Its amazing how much one can do with a lathe and a bit of ingenuity

[XEMON]

Connector fitting done.


Next is to put it all together and chase the missing hardware 😅

[XEMON]

Made this tray, but not sure it will work for this build ...

[XEMON]

Will definitely not use the tray 😅

Got everything ready to air up so hopefully I'll have a cycle this week.

For the feedneck, I think I'll steal gnarlynick idea of using a sconi one 😁

[gnarlynick]

Just make sure you don't drill out the rearward hole all the way through; breaks the seal on the bolt.

[XEMON]

Will definitely not use the tray 😅

Got everything ready to air up so hopefully I'll have a cycle this week.

For the feedneck, I think I'll steal gnarlynick idea of using a sconi one or make a press fit 😁

[XEMON]

Aired up and leaks from everywhere, but it shoot and cycles 🥳

[XEMON]

Im "proud" to present you my fabocobled over/under: The Strap-On



It does shoot, with some interesting side effect ... because it fills the lower chamber first, then from the top of the lower chamber start filling the upper one, there is a slight delay between the 2 spools. And because i spaced the 2 breached with exactly the space for 1 ball, i dont get chop (as long as i do not pull the trigger back to fast 😅)
I am chasing a leak down tho ... that macroline tubing is just a tad to small to fit tightly in the quick connect tee ...

[StaticShocked]

That is awesome! Is it like pop, 50 milliseconds, pop? I kinda want to hear it firing. How many trigger pulls is it capable of per second? You will get twice as many balls downrange while snap shooting!

[The Hobbit]

How do you intend to feed the lower body?

[XEMON]

RPP got it, the top tube is drilled through for the ball to drop through.
To avoid chop, the spacers assure that there is a whole ball as a "spacer" between the tubes so the rounds are sitting properly in the breaches.