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 71 users online :: 4 registered, 0 hidden and 67 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Problems with stun gun.

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

Unread postAuthor: TechnoMancer » Sun Dec 02, 2007 4:39 pm

has anyone tried a small tesla coil as ignition?
  • 0


TechnoMancer
Corporal
Corporal
 
Posts: 64
Joined: Mon Jul 02, 2007 4:58 am
Location: Christchurch New Zealand
Reputation: 0

Unread postAuthor: Ragnarok » Sun Dec 02, 2007 5:53 pm

TechnoMancer wrote:has anyone tried a small tesla coil as ignition?

Tesla coils are much too complex for what we need. Marx Generators or Flyback transformers would be a much better and simpler choice.
  • 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: TechnoMancer » Mon Dec 03, 2007 1:51 am

a flyback is a tesla coil. or at least you can make it work as one it doesn't have to. but a tesla coild would use a single lead and create quite a large arc which would definately ignite the mix every time
  • 0


TechnoMancer
Corporal
Corporal
 
Posts: 64
Joined: Mon Jul 02, 2007 4:58 am
Location: Christchurch New Zealand
Reputation: 0

Unread postAuthor: Ragnarok » Mon Dec 03, 2007 10:40 am

TechnoMancer wrote:a flyback is a tesla coil. or at least you can make it work as one it doesn't have to.

A "proper" Tesla coil has extra unnecessary additions that would complicate matters and increase expense.

A ZVS flyback driver running the right transformer would be alright on it's own.
Use it to charge a Marx Generator, and you could have lots of fun jumping huge sparks along the entire length of the chamber.
  • 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: TechnoMancer » Mon Dec 03, 2007 5:33 pm

or use a tesla coil and have a nice pretty corona that is constant.
  • 0


TechnoMancer
Corporal
Corporal
 
Posts: 64
Joined: Mon Jul 02, 2007 4:58 am
Location: Christchurch New Zealand
Reputation: 0

Unread postAuthor: sandman » Mon Dec 03, 2007 6:39 pm

i dont think your quite grasping the concept that its too complex for what we need, all we want is power and we want it easily.
  • 0


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

Unread postAuthor: Ragnarok » Mon Dec 03, 2007 8:24 pm

Indeed. We cannot subject PVC chambers to the punishment of sparks for more than the shortest of times, and we also cannot be arsed to create anything more complicated than it needs to be.

Things must be kept simple. The more complex they are, the more often they will fail, and the harder they will be to repair. A Tesla coil is not suitable. Make your next launcher with one if you insist, but don't expect anyone else to copy your act of lunacy.
  • 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

Sponsored

Sponsor
 


Unread postAuthor: sjog » Mon Dec 03, 2007 8:34 pm

Ragnarok is right. A spark is a spark. K.I.S.S.
Oh ya I had to have stun circuit, they are a pain. Ended up using batt.
BBQ igniter. GB's don't fly any further w/ stun
  • 0


sjog
Donating Member
Donating Member
 
Posts: 440
Joined: Sun Oct 15, 2006 9:43 pm
Location: Marthas Vineyard
Reputation: 0

Unread postAuthor: TechnoMancer » Wed Dec 05, 2007 2:36 am

but a corona is better than a spark. oh well i guess my interests are lost on people like you. btw here is a link to a small TC that looks quite cool: http://www.richieburnett.co.uk/hfsstc.html
  • 0


TechnoMancer
Corporal
Corporal
 
Posts: 64
Joined: Mon Jul 02, 2007 4:58 am
Location: Christchurch New Zealand
Reputation: 0

Unread postAuthor: psycix » Wed Dec 05, 2007 9:46 am

sjog wrote:Ragnarok is right. A spark is a spark. K.I.S.S.


That is 100% true

Uhm wait... not 100%, 99%.
If one would make a bigass capacitor array unleashing a dozen of kilojoules in the chamber you would generate so much heat you wouldnt even need fuel.

But for the rest of us, a spark is a spark.
  • 0

User avatar
psycix
Donating Member
Donating Member
 
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands
Reputation: 0

Unread postAuthor: TechnoMancer » Wed Dec 05, 2007 2:07 pm

or if you used a large enough tesla coil with a sharp point at the back of the chamber you could cause enough plasma and electric wind to force a projectile out of the barrel.
  • 0


TechnoMancer
Corporal
Corporal
 
Posts: 64
Joined: Mon Jul 02, 2007 4:58 am
Location: Christchurch New Zealand
Reputation: 0

Unread postAuthor: psycix » Wed Dec 05, 2007 2:13 pm

Yea or you could induce it with so much power that you make the potato travel trhough time. The potato will be splattered through the target before the gun is even fired!
  • 0

User avatar
psycix
Donating Member
Donating Member
 
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands
Reputation: 0

Unread postAuthor: TechnoMancer » Wed Dec 05, 2007 2:42 pm

that would not happen as for the potato to travel that fast it would have enough kinetic energy to have infinite mass causing it to pull the universe into a giant black hole behind it!!!!
  • 0


TechnoMancer
Corporal
Corporal
 
Posts: 64
Joined: Mon Jul 02, 2007 4:58 am
Location: Christchurch New Zealand
Reputation: 0

Unread postAuthor: jimmy101 » Thu Dec 06, 2007 9:28 am

TechnoMancer wrote:but a corona is better than a spark. oh well i guess my interests are lost on people like you. btw here is a link to a small TC that looks quite cool: http://www.richieburnett.co.uk/hfsstc.html

Does anybody know if a corona discharge will ignite propane + air?

IIRC, a corona is a lot different than a spark. Coronas have extremely high voltage at even more extremely low currents (lower curent than even a piezo).

To ignite propane + air you need something in the vicinty of a few tens of millijoules in a very small volume. A corona might not get enough energy into a small enough volume to actually ignite the fuel.
  • 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

Previous

Return to Combustion Cannon Discussion

Who is online

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

Reputation System ©'