Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 82 users online :: 5 registered, 0 hidden and 77 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

What I've been working on

Post questions and info about hybrid (compressed gas with fuel) powered cannons here. This includes discussion about fuels, ratios, ignition systems, build types, safety, and anything else relevant.
Sponsored 
  • Author
    Message

What I've been working on

Unread postAuthor: Fnord » Mon Jun 23, 2008 5:51 pm

Seeing as I haven't posted anything interesting in a while, I guess I'll slip a little.

This is a 2" porting, steel inline piston valve I made in my spare time at my new job. It still needs some grinding and a finished piston, but it seems to be functioning very well even though the piston isn't even sealed/epoxied yet.

I may coat the outside in bondo and sand it down to make a nice smooth surface. I don't like the uneven look of freshly ground welds.

Feel free to spam/speculate away!
  • 0

Attachments
top.jpg
Seat hasn't been smoothed yet, but it seals fine the way it is.
angle.jpg
side1.jpg
The piston uses a floating oring, meaning it will seal perfectly when the pressure in the back is lower than the front, but not the other way around.
User avatar
Fnord
Major General
Major General
 
Posts: 2244
Joined: Tue Feb 13, 2007 9:20 pm
Location: Pripyat
Reputation: 7

why do people read this?

Unread postAuthor: e1337 » Mon Jun 23, 2008 5:59 pm

Damn, thats amazing. What mix do you plan on using? Can't wait to see this thing in action. I look forward to see the bondo finish.

e1337
  • 0

Super Sonic Helium-Powered Coaxial Coming-Up...

e1337
Staff Sergeant
Staff Sergeant
 
Posts: 110
Joined: Mon May 28, 2007 8:00 pm
Location: Florida
Reputation: 0

Unread postAuthor: FishBoy » Mon Jun 23, 2008 6:23 pm

i like it, what are you planning on using it for?
  • 0

User avatar
FishBoy
Colonel
Colonel
 
Posts: 575
Joined: Tue May 27, 2008 5:51 am
Reputation: 0

Unread postAuthor: mark.f » Mon Jun 23, 2008 8:23 pm

So it's similar to a sprinkler valve in operation (with the ports switched around to be "barrel sealing")?

I haven't posted in a while either, but I can't say I've been doing anything meaningful in my absence. :wink:
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: sandman » Mon Jun 23, 2008 8:25 pm

well, 6 more posts and you dont have to do anything meaningful cause ul be 1337 :wink:
  • 0


sandman
Colonel
Colonel
 
Posts: 672
Joined: Thu Mar 15, 2007 6:59 pm
Reputation: 0

Unread postAuthor: THUNDERLORD » Mon Jun 23, 2008 8:52 pm

Hope it's a piston hybrid.
More pics/completed!!! (Please)
I've enjoyed all your builds! :wink: 8)
  • 0

-----SPEED,STRENGTH, AND ACCURACY.-----
"Procrastination" is five syllables for "Sloth".
Theopia 8)
Born To Be Alive!

THUNDERLORD
Major General
Major General
 
Posts: 1264
Joined: Fri Mar 28, 2008 1:42 pm
Reputation: 0

Unread postAuthor: SpudFarm » Tue Jun 24, 2008 2:21 pm

that is freaking HUGE!

what do you plan on using it for? (scale?)
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: POLAND_SPUD » Tue Jun 24, 2008 2:45 pm

LOL that's awesome... please tell me it's not going to be a handheld launcher
  • 0

Last edited by POLAND_SPUD on Tue Jun 24, 2008 3:03 pm, edited 1 time in total.
Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: SpudFarm » Tue Jun 24, 2008 2:54 pm

if it was handheld it would be a plane because of the recoil :P
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Unread postAuthor: Fnord » Tue Jun 24, 2008 6:19 pm

i like it, what are you planning on using it for?


My next big project obviously, which being in the hybrid section would make it my next big hybrid project :)

So it's similar to a sprinkler valve in operation (with the ports switched around to be "barrel sealing")?


To my knowledge, yes. I thought most sprinklers were barrel sealers though (?). I've never seen one in person, actually.

what do you plan on using it for? (scale?)

freaking HUGE!

(I think I gave you a rough idea in a pm once. It's not crazy huge, but easily considered "full-size".)

-----------

LOL that's awesome... please tell me it's not going to be a handheld launcher


OK, I won't tell you.
  • 0

User avatar
Fnord
Major General
Major General
 
Posts: 2244
Joined: Tue Feb 13, 2007 9:20 pm
Location: Pripyat
Reputation: 7

Unread postAuthor: Ragnarok » Tue Jun 24, 2008 6:25 pm

_Fnord wrote:
LOL that's awesome... please tell me it's not going to be a handheld launcher

OK, I won't tell you.

...Umm, you are joking... right?

Or do you like entering orbit every time you fire?
  • 0

Does that thing kinda look like a big cat to you?
User avatar
Ragnarok
Chief of Staff
Chief of Staff
 
Posts: 5339
Joined: Tue Dec 19, 2006 8:23 am
Location: The UK
Reputation: 8

Unread postAuthor: SpudFarm » Tue Jun 24, 2008 6:29 pm

oh.. that hybrid :D
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Unread postAuthor: Fnord » Tue Jun 24, 2008 6:39 pm

...Umm, you are joking... right?

Or do you like entering orbit every time you fire?


Keep in mind the power will be limited by the how heavy it can be (the valve weighs around 10 lbs by itself).
The weight will also help with recoil; I have a combustion launcher of comparable weight and power which still has considerable recoil, but based on my observations so far, it should be survivable* with a heavily padded stock.
It might end up being the most powerful handheld out there though. For a while at least.

Edit: though if I had access to titanium, I'd be using the recoil to jump between rooftops in some bizarre combination of spudding/parkour/quake3.

*Fun
  • 0

User avatar
Fnord
Major General
Major General
 
Posts: 2244
Joined: Tue Feb 13, 2007 9:20 pm
Location: Pripyat
Reputation: 7

Return to Hybrid Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'