Reproduction smoke grenade control box - Blank Version COMPLETE!

[HDN]

Acetone vapor post-processing is complete. This box blank is done!



EDIT: Please pardon the dust on the image. Apparently I have plenty of it around here

 

[Crapgame]

That looks gosh-darned good! What does the back side of the main housing look like? Did you print in bosses for drilling/tapping to screw on the base plate?

 

[Crapgame]

Love the t-shirt launcher idea! How far from Hattiesburg is your friend? Would love to talk to them maybe visit and look at it if able.

Dataplates.net is out of Missoula Montana, I've never met the man in person.

The T-Shirt launcher idea was to be for a Mardi Gras Parade, local, that did not happen due to the Chinese-lab created with training by USA scientists Covid 19 virus. Concept is sound. Use a heat shrink tube to keep your T-shirts pre-rolled, might need a cardboard disc like reloading full lead wadcutters you have to use a gas-check to ensure the most efficient transfer of the overpressure PSI energy to push the T shirt out the short aluminum barrel.

The real LVOSS tubes are sealed with a larger OD O ring between the milled aluminum barrel and the main housing, as well as a teflon washer around the ignition electrode. Most or many of the LVOSS have been demilled by removing the capacitor and the electrodes. Leaves plenty of room for valving inside. I know the 24V Thomas 1/3hp air compressor does a good job generating cubic feet per minute as well as PSI. You'd have to experiment whether your plumbing is capable of moving XX CFM per burst to push all 4 shirts out the barrels or if only enough PSI is available at a time to push only 1 or 2 at a time.

 

[Crapgame]

I can't believe I never posted internal photos.


The side wall thickness is 0.1715"
Corner bosses are 0.654" radius from the exterior corner radii.
Hardware 4each 1/4"-28 x 3/4" overall countersink machine screws.

In order to use your CAD to make burnable string patterns for lost wax/investment cast aluminum housings (maybe you'll bid on an FBO.GOV contract to mfg them?) that internal core that forms the cavity has to have the same 5 degree taper as the outside so the wall thickness remains uniform and the 5 degree draft allows the core to be removed from the casting mold.

The core itself gets destroyed when you remove the casting from the green sand, not reusable.
Black rubber/neoprene gasket 0.046" thick.

 

[HDN]

That looks gosh-darned good! What does the back side of the main housing look like? Did you print in bosses for drilling/tapping to screw on the base plate?

Thanks! Your info was very helpful in making this happen The only holes I engineered to print are small pilot holes for attaching the box cover to the base. Everything else I left solid for drilling holes of the desired size and location for any hardware. The print was made with zero infill.

I can't believe I never posted internal photos.
View attachment 937566

The side wall thickness is 0.1715"
Corner bosses are 0.654" radius from the exterior corner radii.
Hardware 4each 1/4"-28 x 3/4" overall countersink machine screws.

In order to use your CAD to make burnable string patterns for lost wax/investment cast aluminum housings (maybe you'll bid on an FBO.GOV contract to mfg them?) that internal core that forms the cavity has to have the same 5 degree taper as the outside so the wall thickness remains uniform and the 5 degree draft allows the core to be removed from the casting mold.

The core itself gets destroyed when you remove the casting from the green sand, not reusable.
Black rubber/neoprene gasket 0.046" thick.

Ooooo the FedBizOffice... You're giving me ideas!

3D printing of stuff has been really helpful for our armed services in replacing OOP parts that would otherwise require a special, pricey production run. For example, the USAF has been using 3D printers to keep their C-5s, B-52s, and B-2s flying. The Army reverse-engineered or 3D-scanned parts a UH-60 so they can print any part needed for it. We're not just talking about printing plastic stuff - metals are fair game too!