Search found 226 matches

by mrfoo
Tue May 10, 2022 5:45 am
Forum: Pneumatic Cannons
Topic: I need of dire help (Air Solenoids valves)
Replies: 2
Views: 182

Re: I need of dire help (Air Solenoids valves)

Can't help you with solenoids except to say that they're probably orders of magnitude too slow for what you want. I can't even necessarily help with the latter part, but I can give some gut feel. Would like to find out about some new stuff if I can, maybe something along the lines of how much PSI sh...
by mrfoo
Wed Apr 27, 2022 6:52 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Convert a Gas refill cylinder to an air cylinder?
Replies: 7
Views: 310

Re: Convert a Gas refill cylinder to an air cylinder?

What I meant was I'd drill a hole at the end of the gas canister and then epoxy on the Schrader valve in the end for it to accept air instead of gas. But your saying that it's impossible? Nothing's impossible. But at a guess, the walls of that canister are no thicker than 0.5 mm or so. That's super...
by mrfoo
Tue Apr 26, 2022 11:25 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Convert a Gas refill cylinder to an air cylinder?
Replies: 7
Views: 310

Re: Convert a Gas refill cylinder to an air cylinder?

At a guess, that can's gonna be super thin, which would make modding it pretty difficult. I'd be more tempted to look at a discarded 60l oxygen canister or maybe a fire extinguisher CO2 recharge canister. Rather than modifying a canister, try talking to a local machinist, see if they can make up a t...
by mrfoo
Sun Nov 28, 2021 8:33 am
Forum: Off-Topic Hobbies
Topic: OK, it's not a spud launcher
Replies: 1
Views: 866

OK, it's not a spud launcher

But it's pretty damn next level.

by mrfoo
Fri Oct 01, 2021 9:55 am
Forum: BB, Airsoft, and Pellet Guns
Topic: What is 0000 buckshot used for?
Replies: 2
Views: 754

Re: What is 0000 buckshot used for?

It's used for shooting big mother buckers.
by mrfoo
Sun Aug 29, 2021 5:05 am
Forum: Hybrid Cannons
Topic: Thoughts on my piston valve design
Replies: 41
Views: 13667

Re: Thoughts on my piston valve design

> Obviously the downside is the spring isn't variable so a different spring would be needed for a given mix.

A threaded boss at the rear can increase or reduce preload on the spring within a certain range, although this will also reduce spring travel.
by mrfoo
Mon Aug 16, 2021 5:45 am
Forum: Off-Topic Hobbies
Topic: I CAN HAZ MILING MACHIEN?
Replies: 4
Views: 1953

Re: I CAN HAZ MILING MACHIEN?

So, spent some time stripping down a bit. Managed to unblock the tooling and the Z axis, (hooray for hand winches), loking at the scraping marks on the slideways and gibs I thought to myself "that's been rescraped", but given the way the gibs fit, I'd be surprised if it's done many hours from new. D...
by mrfoo
Sat Aug 14, 2021 1:06 am
Forum: Off-Topic Hobbies
Topic: I CAN HAZ MILING MACHIEN?
Replies: 4
Views: 1953

I CAN HAZ MILING MACHIEN?

It's been a while that I've been looking for a smallish milling machine to go with my smallish lathe(s). Yes, I am aware that the chinese make some fairly capable small milling machines. But I simply don't like them. Horrible yucky plastic tat. Id far rather something made of great big chunks of cas...
by mrfoo
Thu Jun 17, 2021 5:40 am
Forum: Combustion Cannons
Topic: Trouble with oxy/acetylene mix
Replies: 6
Views: 2140

Re: Trouble with oxy/acetylene mix

No idea how to resolve the problem. Just posting to say "Whoah what the fuck you're clearly my kind of absolute fucking maniac" 🤘
by mrfoo
Tue May 25, 2021 12:06 am
Forum: Off-Topic Hobbies
Topic: Two Italian WW2 helmets found
Replies: 5
Views: 2456

Re: Two Italian WW2 helmets found

That's pretty cool.
by mrfoo
Thu Apr 22, 2021 2:15 pm
Forum: Hybrid Cannons
Topic: Xtreme-patator
Replies: 11
Views: 3970

Re: Xtreme-patator

Nice. Comme dit hector, le cuivre ne risque pas d'aimer cette utilisation. Tube acier sans soudure Ø20, ep2 te donnera Øint de 16mm, ce n'est pas trop cher - https://lamtechno.com/tube-acier-de-precision-e235n-rond-sans-soudure-cintrable/90-381-tube-acier-sans-soudure-cintrable-diametre-20.html#/23-...
by mrfoo
Thu Apr 01, 2021 12:26 am
Forum: Pneumatic Cannons
Topic: Pressure rating for Coaxial cannons
Replies: 12
Views: 4330

Re: Pressure rating for Coaxial cannons

Good question. The force being applied to the barrel will be compression, rather than tensile, and PVC (like many materials) is stronger in that respect. Tensile strength of rigid PVC, 34 … 62 MPa, Compressive strength 55 … 89. So in that respect, you're probably OK. However. These figures are signi...
by mrfoo
Sun Mar 28, 2021 6:23 am
Forum: Hybrid Cannons
Topic: Large hybrid
Replies: 10
Views: 4423

Re: Large hybrid

Norguns wrote:
Sat Mar 27, 2021 11:56 am
I get what you are saying, I might not get any real velocity gain from it. That being said, the entry fee for evacuating the air from the barrel is low on my setup and i might play with it at a later time.
You owe it to yourself to try :)
by mrfoo
Tue Mar 16, 2021 1:12 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: Spring powered Nerf blaster
Replies: 9
Views: 3452

Re: Spring powered Nerf blaster

Outstanding!
by mrfoo
Tue Mar 02, 2021 12:30 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: Spring powered Nerf pistol
Replies: 7
Views: 2792

Re: Spring powered Nerf pistol

Back in the day, we used to do that to bike parts. "Drillium", it was called.