Search found 181 matches

by mrfoo
Mon Oct 26, 2020 6:52 am
Forum: General How-To & Discussion
Topic: JSR's workshop chronicles
Replies: 37
Views: 8395

Re: JSR's workshop chronicles

Nice, a much cleaner setup than my workshop. Hell, even your rustic stock stand is cleaner than my workshop :) I like your mill vice. Watch out with the LEDs, depending on the type they have a strobe effect that can make spinning things appear to be still, or jut simply give you a headache if you're...
by mrfoo
Thu Oct 22, 2020 6:25 am
Forum: Pneumatic Cannons
Topic: Concerning video of a Piston Valve Cannon bursting
Replies: 10
Views: 218

Re: Concerning video of a Piston Valve Cannon bursting

Do you think his can suffer the same fate as theres ? Don't make me bring out Bob the Angry Flower. It's a 2" cannon, as opposed to the original's 3". For the same piston construction, the piston will have a mass that is at least 4/9 (2^2 / 3^2) less than that of the larger cannon. The force applie...
by mrfoo
Thu Oct 22, 2020 12:24 am
Forum: Pneumatic Cannons
Topic: Concerning video of a Piston Valve Cannon bursting
Replies: 10
Views: 218

Re: Concerning video of a Piston Valve Cannon bursting

Do you think it would of been better to put a funneled reducer from the chamber to the barrel instead of an abrupt one? No, I think it would have been better to not use PVC. My guess as to what's happening is that the piston shoots backwards as intended, the pressure behind it perhaps blows off the...
by mrfoo
Wed Oct 21, 2020 12:26 am
Forum: Pneumatic Cannons
Topic: Concerning video of a Piston Valve Cannon bursting
Replies: 10
Views: 218

Re: Concerning video of a Piston Valve Cannon bursting

There's a lot of mass in a 3" piston, and PVC is fragile. The break at the barrel end was clean and exactly at the stress riser where the reducer meets the valve body, looks like shock fracture rather than pressure rupture. Lesson to learn - don't do that. At 2:00 or so, he says "That's not funny. I...
by mrfoo
Sun Sep 20, 2020 3:05 pm
Forum: SpudFiles Discussion
Topic: pages won't open
Replies: 18
Views: 1141

Re: pages won't open

Thanks for all your work, man.
by mrfoo
Fri Sep 11, 2020 5:40 am
Forum: SpudFiles Discussion
Topic: pages won't open
Replies: 18
Views: 1141

Re: pages won't open

All appears to be working again for me, many thanks to @PCGUY
by mrfoo
Mon Sep 07, 2020 1:44 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Let's talk nerf blasters
Replies: 4
Views: 316

Re: Let's talk nerf blasters

I could always make my own, but it would be too powerful and might kill someone, so that idea is out.
I thought that was the idea?

Seriously, though, 150 bucks for a (high performance, admittedly) plastic toy gun? Tha fukk? I'd be far more inclined to try the nexus pro.
by mrfoo
Sun Aug 30, 2020 3:36 am
Forum: SpudFiles Discussion
Topic: pages won't open
Replies: 18
Views: 1141

Re: pages won't open

It certainly seems that any access to viewtopic.php with the 'p' parameter set causes a 500. https://www.spudfiles.com/viewtopic.php?f=6&t=27162 gets me to this thread mostly OK, but https://www.spudfiles.com/viewtopic.php?p=388828#p388828, which should take me to the first post of the thread hard 5...
by mrfoo
Sun Aug 30, 2020 3:34 am
Forum: SpudFiles Discussion
Topic: pages won't open
Replies: 18
Views: 1141

Re: pages won't open

could be a link thing, I had to try different links until I got here this time I thought so, and it seemed to be that for a while specifically with some more complex links (trying to access a particular post in a thread, for example), but I'm getting random 500s even on direct access to this thread...
by mrfoo
Sat Aug 29, 2020 3:50 pm
Forum: SpudFiles Discussion
Topic: pages won't open
Replies: 18
Views: 1141

Re: pages won't open

Not just you. There's something very b0rked.
by mrfoo
Fri Aug 28, 2020 11:28 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Full auto airsoft pistol
Replies: 3
Views: 565

Re: Full auto airsoft pistol

Video or it didn't happen :)
by mrfoo
Sun Aug 23, 2020 4:17 am
Forum: Hybrid Cannons
Topic: Autonomous pistol .22
Replies: 13
Views: 823

Re: Autonomous pistol .22

Ooooh, I like that. I assume the part that eventually needs replacing is the o-ring?
by mrfoo
Sat Aug 08, 2020 1:07 am
Forum: Hybrid Cannons
Topic: Cooking up a little something...
Replies: 79
Views: 14619

Re: Cooking up a little something...

Wow, missed that update, came back here from the link you posted elsewhere. 100% success indeed. 1067fps for a golf ball means you're basically being maxed out by the shock wave, i.e you're hitting the sound barrier. This makes me wonder what could be done with a streamlined projectile of the same c...
by mrfoo
Sun Jul 19, 2020 1:59 pm
Forum: General How-To & Discussion
Topic: JSR's workshop chronicles
Replies: 37
Views: 8395

Re: JSR's workshop chronicles

that is my understanding, yes.
by mrfoo
Tue Jul 14, 2020 12:44 am
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1488
Views: 106232

Re: Short question topic

His explanation of how it works is dead wrong, the pressure in the two chambers will always equalise. The principle at work is exactly the same as that of a QEV, the force exerted on the piston at the "bulb" end is gas pressure * piston cross sectional area, and at the strut end it's gas pressure * ...