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 79 users online :: 4 registered, 0 hidden and 75 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Hydrogen Powered Mini?

Discuss miniature cannons built from things such as pill bottles and pen caps.
Sponsored 
  • Author
    Message

Hydrogen Powered Mini?

Unread postAuthor: KurlyQ » Thu Jul 09, 2009 12:38 am

So, I've been tossing the idea of making a hydrogen powered spud gun around in my head for a while, and I've even made a few prototypes, but they never seem to be reliable.
Making a mini cannon seemed to be my only reasonable way to go about this for three reasons:

1: less hydrogen takes less time to make
2: if a mini cannon explodes, it won't be as dangerous as a large one
3: I don't have much money to buy large parts

I use electrolysis to generate my hydrogen, just because it's easy, safe, cheap, and on demand.
The reason I'm posting here is that I'm looking for some ideas for materials to make a new and awesome cannon out of.
I have a quick picture below that outlines my current idea, but it needs some improvement.
Image

any ideas?
anything is welcome
  • 0

User avatar
KurlyQ
Private
Private
 
Posts: 20
Joined: Sun Mar 30, 2008 7:29 pm
Reputation: 1

Unread postAuthor: inonickname » Thu Jul 09, 2009 12:47 am

Oh god..I swear I've already done something that reminds me of this..

I'm going to say straight up, don't use plastic. Metals are the way to go, I used aluminum, brass and stainless on mine. I'd also recommend to not have the electrolysis system in your gun, as if it explodes it not only cuts you up, but you spill a caustic liquid on your hand. Also, the use of a decent electrolyte will result in corrosion of metal chambers.

Image

If you use metals that are vulnerable to hydrogen embrittlement then varnish your gun.
  • 0

PimpAssasinG wrote:no im strong but you are a fat gay mother sucker that gets raped by black man for fun
User avatar
inonickname
Lieutenant General
Lieutenant General
 
Posts: 2606
Joined: Sun Dec 07, 2008 3:27 am
Reputation: 0

Unread postAuthor: KurlyQ » Thu Jul 09, 2009 11:31 am

that's an awesome cannon. I'll have to look into getting some metal parts soon. thanks for the inspiration :D
  • 0

User avatar
KurlyQ
Private
Private
 
Posts: 20
Joined: Sun Mar 30, 2008 7:29 pm
Reputation: 1

Unread postAuthor: jimmy101 » Thu Jul 09, 2009 2:04 pm

Might take a look at;
1. http://sci-toys.com/scitoys/scitoys/ech ... .html#bomb
2. google "Estes hydrogen rocket"
3. http://www.et.byu.edu/~wheeler/benchtop/pumpkin.php and http://www.et.byu.edu/~wheeler/benchtop/pumpkin2.php

In a gun, there are a couple challenges. Inonickname pointed out several of them. In addition, if the electrolysis is "on board" then you have problems keeping the spark (ignition) electrodes dry enough to operate. You also have to have a way to deal with the pressure build up that occurs as the hydrolysis progresses. Doesn't take much pressure to pop the ammo out'a tha barrel without even igniting the mixture.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3127
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 7

Unread postAuthor: inonickname » Fri Jul 10, 2009 5:52 am

Here's another hint: Fire it right after you fuel it, as hydrogen is happy to find any leak you never thought existed.
  • 0

PimpAssasinG wrote:no im strong but you are a fat gay mother sucker that gets raped by black man for fun
User avatar
inonickname
Lieutenant General
Lieutenant General
 
Posts: 2606
Joined: Sun Dec 07, 2008 3:27 am
Reputation: 0

Return to Miniature Cannon Discussion

Who is online

Registered users: Bing [Bot], D_Hall, Google [Bot], Yahoo [Bot]

Reputation System ©'