442ndRCT Soldier's Forum

Tim dropped this off a few days ago, I'm not sure who it belongs to, but I'm going to begin work on a pneumatic engine so we can fire stuff at our foes



Engine update 9/13
-My engineer dropped out last week when he has a serious seizure while on the lathe. He's ok, but we're not allowing him to work on heavy machines until he's completely recovered and taking care of himself.

Meanwhile, I took his napkin drawings and fabbed a small prototype of the engine. I'll be testing the principals and capabilities before making a complete engine for the bazooka. I gotta figure out numbers and stuff that I normally don't crunch when making things .

picture coming

11/9 big ass update on page 3

Spiggy wrote:Tim dropped this off a few days ago, I'm not sure who it belongs to, but I'm going to begin work on a pneumatic engine so we can fire stuff at our foes

Silly, why would I ask you to work on it if I didn't own it?

Spiggy, I like your photos, nice set-up and presentation

OOoo
i like it

updated

Spiggy wrote:updated

Meh you shouldn't crunch dude...

All working men know...

"Measure twice, cut once."

Spiggy can you give us some details about your engine, how it will work and function, and what sort of range your hoping for?

current plans are based off of Sal's design, which is pneumatic based.

I don't plan on scanning old documents(napkins, literally, the schems are on napkins)or creating publicly-viewed schematics because I do believe he deserves a lot of credit for designing this engine.

the engine has a two valves, one on/off valve secured to a secondary resevoir and a secondary valve secured to a main resevoir, at positive pressure, the secondary valve shuts down, creating a main resevoir.

when completely filled, the pressure equalizes and everything stops filling.

Opening the on/off valve will cause the secondary resevoir to release the air (backblast) and releases the secondary valve. the secondary valve then empties the main resevoir (payload).

I will be making the trigger mechanism electronic-based like the original bazooka but include a manual "Forward Assist" like a M16 hidden under the cheekpiece, should the mechanism jam.



Originally, this was designed to be completely manual and the first gun to have this engine was a PIAT grenade launcher. we got roughly 150 yards out of this prototype and a 10inch barrel (as well as a loud bang)

The second is an AT4, with a cleaned and remodeled (though still crude) engine with less o-rings and more springs. This one peaked at 180 yards with a 18inch barrel

I plan on meeting the AT4's performance or even break the record by hitting terminal velocity of a NERF pocket vortex football at approximately 300 yards and an 18-20inch barrel. If I cant launch a football out of the parking lot in our warehouse area, then I'm doin' it wrong.

-course, we don't have to run the bazooka at 800psi,

Very awesome... BTW the PIAT was essentially a larger crossbow it worked on a spring and tension technique. Kinda ironic in a way. I think it should ring that tank, that way they KNOW they got hit But woe betide any people in the way

Two things come to mind here. First, although it doesn't sound like it will be ready any time this year, we sure could use this at Roberts in November.

Second. That PIAT could be a good weapon to have out there too!

our PIAT is really hokey, it's literally a bunch of jbwelded PVC joints to look like a mockery of a PIAT

Update 9/21!
main engine body is done!

Next weekend I start on pistons and valves

Cool!

Spiggy wrote:Update 9/21!
main engine body is done!

Next weekend I start on pistons and valves

Talked to... well forgot the guy's name. But he's the guy from 12th SS that manufacturers the scores of grenades, rifle grenades, and projectiles that they use on the field. Dave and me were talking with him and he said he'd love to do Bazooka rounds for us but he's busy enough. But if you are looking for a round that might work he'd gladly educate us on how to build them if we provide the materials... He says he had one with a launcher that would go 50-100 yds...

That would be Dingoboy71 on e-bay. He's the same guy.