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 57 users online :: 3 registered, 0 hidden and 54 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Propellants?

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
Sponsored 
  • Author
    Message

Propellants?

Unread postAuthor: prairie warrior » Wed Feb 25, 2009 9:14 pm

what are all of the working propellants for a combustion spud gun. tnx
  • 0


prairie warrior
Private
Private
 
Posts: 6
Joined: Sun Feb 22, 2009 10:21 am
Reputation: 0

Unread postAuthor: jmeyer1022 » Wed Feb 25, 2009 9:27 pm

All of them? Anything combustable lol.
Hairspray
Right Guard
Starter fluid
Butane
Propane
Cologne
MAPP gas

That's a small list. I'd stay away from hair spray because it leaves a gunk on your chamber. Anyways, any plans of building or past builds?
  • 0


jmeyer1022
2nd Lieutenant
2nd Lieutenant
 
Posts: 200
Joined: Sun Nov 09, 2008 4:50 pm
Reputation: 0

Unread postAuthor: LCTChamp » Wed Feb 25, 2009 9:28 pm

This information is everywhere, and here at Spudfiles we don't like to "spoon feed people". If you do a little research you will find your answers. There are too many to list all of them, but here are a few : hairspray, insect repellent, butane, propane, mapp gas, etc. Welcome to Spudfiles!
  • 0

User avatar
LCTChamp
Sergeant Major
Sergeant Major
 
Posts: 187
Joined: Thu Aug 21, 2008 8:01 am
Reputation: 0

Unread postAuthor: Radiation » Thu Feb 26, 2009 12:24 am

I use the one TRUE fuel, steeped in tradition passed down by our spudgunning fore fathers, fermented boar feces. Note I said boar specifically. Pig poop is just too weak to really launch a potato. Also steer clear of hog and other types of swine as most often they prove to be too powerful and can result in serious injury.
  • 0

I void warranties.

The Gauntlet of Clara Ann
User avatar
Radiation
Sergeant Major
Sergeant Major
 
Posts: 183
Joined: Wed Jul 09, 2008 10:57 am
Reputation: 0

Unread postAuthor: pharmboy » Thu Feb 26, 2009 1:16 am

Radiation wrote:I use the one TRUE fuel, steeped in tradition passed down by our spudgunning fore fathers, fermented boar feces. Note I said boar specifically. Pig poop is just too weak to really launch a potato. Also steer clear of hog and other types of swine as most often they prove to be too powerful and can result in serious injury.


Radiation, you wouldn't happen to be familiar with a place called Bartertown, would you? There's a guy there called Master Blaster...well, more of a really smart dwarf strapped to the back of a very large kinda dim guy. I think they pioneered your preferred fuel, they might have some new insights for you... :D
  • 0


pharmboy
Specialist
Specialist
 
Posts: 59
Joined: Fri Feb 20, 2009 6:25 pm
Reputation: 0

Unread postAuthor: starman » Thu Feb 26, 2009 1:25 am

Here is a fairly definitive and humorous look at possible propellants...

http://www.aaroncake.net/spuds/boom.asp

I'm partial to the Hydrogen Fused with initial Uranium-235 Fission and Half Banana, Half Kerosene Solution... :wink:
  • 0

User avatar
starman
Donating Moderator
Donating Moderator
 
Posts: 3041
Joined: Wed Dec 12, 2007 12:45 am
Location: Simpsonville, SC
Reputation: 0

Unread postAuthor: inonickname » Thu Feb 26, 2009 2:41 am

On a slightly more serious note, there is a massive amount of propellants you could use, but some are a little more..practical..

Butane (includes many deoderants/colognes/hairsprays etc..)

Propane

Isobutane (often a secondary ingredient to butane for propellants)

Ether

Naptha (lighter fluid-but not butane)- haven't tried this one

Hydrogen - You need to use electrolysis to get this (or go to a fuel browser if your in the right spot). Electrolysis will also release oxygen in the perfect concentration to ignite with hydrogen, so just purge the chamber with it. Will also burn in large ranges/concentrations. YOU NEED A VERY SHOCK RESISTANT CHAMBER FOR 2H2/O2!

Acetone, shellite, turps, thinners, etc: Need to be atomized (think spray mister), then fired before use to prevent condensation. Be careful, as these may damage your container. (and you!)

Acetylene - Unless you know what you're doing, don't screw with this. Acetylene burns extremely quickly, basically only beaten by hydrogen, releases a massive amount of energy (weak bonds between carbon/hydrogen, strong bonds in CO2), is extremely unstable, forms highly explosive compounds with many metals (especially copper), can ignite if stored above 20 psi, must be dissolved in acetone, is poison and an asphyxiant..the list goes on. Remember if you also use oxygen (as per an oxy-acetylene torch) these effects increase five fold. It also has the largest tolerances of any gas (iirc), even higher than hydrogens 5%-75%.

Oxygen - not a fuel, but will make any deflagration 5 times as violent..

Dichloroflouromethane (or dcfm)- The gas used in air dusters, apparently burns very well. Don't get it on your skin.

Various engine starters, lubricants (eg. RP7, WD40, Freeze n release etc..): Beware of getting freeze and release stuff on your hands or chamber, I'm sure it has the potential to do damage..

Most hydrocarbons will work, but several wont be very energetic (eg methane).

Liquid fuels (petrol, kerosene, rc model fuel) need to be atomised (spray bottle) but will work well and burn cleanly.

Solid fuels aren't supposed to be discussed here, so I'll avoid that. There is also of course aluminum, if you can run enough current through it to turn it into plasma.

Edit: forgot, you can use alcohols (ethanol) if they are misted fine enough..
  • 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

Sponsored

Sponsor
 


Unread postAuthor: prairie warrior » Thu Feb 26, 2009 9:29 am

tnx every body oh ya thanks for the huge list on the link :D
  • 0


prairie warrior
Private
Private
 
Posts: 6
Joined: Sun Feb 22, 2009 10:21 am
Reputation: 0

Unread postAuthor: jimmy101 » Thu Feb 26, 2009 11:55 am

  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3128
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 7

Unread postAuthor: PaulsAirsoftArmory » Sat Feb 28, 2009 9:15 pm

jmeyer1022 wrote:All of them? Anything combustable lol.
Hairspray
Right Guard
Starter fluid
Butane
Propane
Cologne
MAPP gas

That's a small list. I'd stay away from hair spray because it leaves a gunk on your chamber. Anyways, any plans of building or past builds?


Ether isn't too powerful for a SCH-40 potato cannon? I had thought about using it as a combustion source, but was afraid that I would blow myself up by using it :shock:
  • 0


PaulsAirsoftArmory
Specialist
Specialist
 
Posts: 43
Joined: Sat Feb 28, 2009 7:31 pm
Reputation: 0

Unread postAuthor: Radiation » Sat Feb 28, 2009 10:25 pm

Nope, it works best with a larger gun. It tends to flood smaller ones due to it's potency. It will leave a lot of soot in your chamber though.
  • 0

I void warranties.

The Gauntlet of Clara Ann
User avatar
Radiation
Sergeant Major
Sergeant Major
 
Posts: 183
Joined: Wed Jul 09, 2008 10:57 am
Reputation: 0

Return to Combustion Cannon Discussion

Who is online

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

Reputation System ©'