Search found 1505 matches

by Zeus
Mon Dec 23, 2019 8:58 pm
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2411
Views: 136898

Re: "In the world of spuds today"

Definitely give stick a try. It sounds antiquated and imprecise, but I default to stick and TIG over MIG. Before I got my TIG, I used to weld motorcycle exhausts with 1/16" rods. Stick will teach you to weld, if your welds look solid, they will be solid (in most cases). MIG/FCAW can trick you somewh...
by Zeus
Sun Dec 15, 2019 6:29 pm
Forum: Pneumatic Cannons
Topic: Saftety of PVC Pipe
Replies: 10
Views: 1363

Re: Saftety of PVC Pipe

The failure pressure of PVC is irrelevant, the failure mode is the critical part. The physical forces on a handheld pressure vessel while pressurised can cause more than enough stress in stress risors to promote failure, which is generally fracturing versus tearing. No other commonly used material f...
by Zeus
Sun Dec 15, 2019 3:52 pm
Forum: Pneumatic Cannons
Topic: Syncing of multiple valves.
Replies: 10
Views: 1405

Re: Syncing of multiple valves.

Larger pilot valve, equal fittings from both pilots to the pilot valve, inspect both for any significant defects on the casement/diaphragm and she'll be right mate.
by Zeus
Sun Dec 15, 2019 7:42 am
Forum: Hybrid Cannons
Topic: TBMA-230 V2.0
Replies: 88
Views: 20420

Re: TBMA-230 V2.0

Dear god he's alive. Seemingly brought me back too...
by Zeus
Mon Feb 12, 2018 4:39 am
Forum: Pneumatic Cannons
Topic: Sourcing large volume high(er) pressure pumps?
Replies: 7
Views: 618

Re: Sourcing large volume high(er) pressure pumps?

This. Diesel compressors are a dime a dozen here, usually 250-300psi. Got to use one to blow out sand from a water bore. 8" 300psi water gun with a 100' barrel is awesome.
by Zeus
Mon Feb 05, 2018 6:41 pm
Forum: Hybrid Cannons
Topic: Need help with burst disc
Replies: 4
Views: 594

Re: Need help with burst disc

3 bar with oxygen, or air
by Zeus
Sun Feb 04, 2018 4:59 pm
Forum: Pneumatic Cannons
Topic: Simulated recoil on heavy cannons
Replies: 18
Views: 1606

Re: Simulated recoil on heavy cannons

Rag, that entirely depends on whether you want true recoil, or the appearance of recoil to the less educated viewer. You aren't gonna achieve true recoil without a heavy projectile, but for the rule of cool, I daresay a cylinder would be satisfactory. The alternate option is making your projectile h...
by Zeus
Sun Feb 04, 2018 4:48 pm
Forum: Hybrid Cannons
Topic: Need help with burst disc
Replies: 4
Views: 594

Re: Need help with burst disc

Short of personal experience, not really. Foil thickness varies from manufacturer to manufacturer. However, you're gonna be looking at a lot. Another option is aluminium barbecue trays, or soft drink/beer cans. Can you correctly define what you mean by a 3x mix? Will it be pressurised to 3 bar, or a...
by Zeus
Sun Feb 04, 2018 4:26 pm
Forum: Pneumatic Cannons
Topic: Simulated recoil on heavy cannons
Replies: 18
Views: 1606

Re: Simulated recoil on heavy cannons

I don't think you'd need to bother with a custom cylinder. You could consider tapping air from the barrel, or just using a second solenoid attached to the chamber. Fire both in unison. However, make sure you have a satisfactory buffer.
by Zeus
Sat Feb 03, 2018 4:15 am
Forum: Off-Topic Hobbies
Topic: Fracturing Veil
Replies: 3
Views: 1189

Re: Fracturing Veil

Excellent work Rag. Honestly don't have more to add than props

Question though, have you come across the Craft books by Max Gladstone? I reckon you'll enjoy them if you haven't yet.
by Zeus
Thu Feb 01, 2018 4:26 pm
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2411
Views: 136898

Re: "In the world of spuds today"

I just used a series of 3/4" (20mm) PVC fittings, but to work in my device, I had to make them smaller. Unfortunately the fuel mix was a bit too powerful
by Zeus
Thu Feb 01, 2018 7:38 am
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2411
Views: 136898

Re: "In the world of spuds today"

Yeah, I tried PVC and an atmospheric pressure propane/O2 mix, but between turning the fittings narrower and you know, PVC, I had splitting problems and it wouldn't move my bolt simulator far enough. Stress testing on the fill valve/spark gap tomorrow (I hope). Built it in a threaded fitting so I can...
by Zeus
Thu Feb 01, 2018 4:59 am
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2411
Views: 136898

Re: "In the world of spuds today"

ITWOST, V1 didn't have the giddyup I needed, time to go over to a conventional(ish) hybrid cartridge. Hopefully my welding skills are sufficient. I expect 12ml at 28x should give me the required gas volume. If not, I'll be tapping gas from before the projectile for extraction.
by Zeus
Tue Jan 30, 2018 8:19 pm
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2411
Views: 136898

Re: "In the world of spuds today"

Stealing my contest idea boy! Better not be touching oxygen....

Quite curious about your results with it though
by Zeus
Tue Jan 30, 2018 12:07 am
Forum: Pneumatic Cannons
Topic: Eclipse Defense job openings
Replies: 5
Views: 632

Re: Eclipse Defense job openings

Better call DYI!