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 47 users online :: 4 registered, 0 hidden and 43 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

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

Interesting 'delayed combustion' in a tin can

All non-spudgun related discussion goes here such as projects, theories, serious questions, etc. All "off-topic" posts (aka useless posting, determined by moderators) will be removed.
Sponsored 
  • Author
    Message

Interesting 'delayed combustion' in a tin can

Unread postAuthor: Insomniac » Fri Sep 05, 2008 3:58 am

I was fooling around with a tin can and deoderant when I discovered that by making a hole in the top, and another in the side near the bottom of a can, you can make it so that it will gently burn for a little while before going WHOOSH. The more deoderant sprayed in, the longer the delay. A smaller 'flame' hole also makes it go longer. Pretty useless really, but interesting. When I get my hands on an old milo tin I might see if I can make it blow off the lid with a bang instead of just going whooosh.

[youtube]http://www.youtube.com/watch?v=hbggOyesUoA[/youtube]
  • 0

I wonder how much deeper the ocean would be without sponges.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.

Add me on msn!!! insomniac-55@hotmail.com
User avatar
Insomniac
Major General
Major General
 
Posts: 1297
Joined: Mon Dec 18, 2006 3:47 pm
Location: Australia
Country: Australia (au)
Reputation: 0

Unread postAuthor: Hotwired » Fri Sep 05, 2008 6:34 am

Yeah it's a common science class demonstration. Usually a coffee can filled with gas from a bench tap.

Except then there's enough gas/air to make a loud bang and blow the lid off the can.

I don't think when I last saw it it was a demonstration of anything much but just to amuse the class for a bit :lol:
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Unread postAuthor: iemand » Fri Sep 05, 2008 8:58 am

Hotwired wrote:Yeah it's a common science class demonstration. Usually a coffee can filled with gas from a bench tap.

Except then there's enough gas/air to make a loud bang and blow the lid off the can.

I don't think when I last saw it it was a demonstration of anything much but just to amuse the class for a bit :lol:


A balloon filled with hydrogen and lighted was also funny :roll:
(strangely the balloon was only 4 ft away from a window, but the window didn't break)
  • 0

Proud member of the Dutch Spud Clan.
User avatar
iemand
Corporal
Corporal
 
Posts: 61
Joined: Sun May 11, 2008 5:49 am
Reputation: 0

Unread postAuthor: Hotwired » Fri Sep 05, 2008 9:22 am

Oh yes, I did bring up the idea of a delayed action airsoft mine for this, there'd be enough force to hurl a lid of bb's about if using a coffee or milo can.

More risky what with the flame and not really too useful but hey, it's a use :)
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Unread postAuthor: Insomniac » Fri Sep 05, 2008 6:48 pm

Just had an idea.... what if I put some methylated spirits in the bottom? The can is fairly cool, so the meths shouldn't evaporate too quick... hopefully it will fire, the resulting explosion stirring up the meths a bit, making more fumes until it goes off again... Like a really, REALLY slow pulsejet.
  • 0

I wonder how much deeper the ocean would be without sponges.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.

Add me on msn!!! insomniac-55@hotmail.com
User avatar
Insomniac
Major General
Major General
 
Posts: 1297
Joined: Mon Dec 18, 2006 3:47 pm
Location: Australia
Country: Australia (au)
Reputation: 0

Unread postAuthor: jimmy101 » Sat Sep 06, 2008 2:21 pm

Insomniac wrote:Just had an idea.... what if I put some methylated spirits in the bottom? The can is fairly cool, so the meths shouldn't evaporate too quick... hopefully it will fire, the resulting explosion stirring up the meths a bit, making more fumes until it goes off again... Like a really, REALLY slow pulsejet.

That's basically what the "jam jar" + liquid fuel pulse jet is. And it isn't all that slow, they still pulse at something like a hundred hertz.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3129
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 7

Unread postAuthor: Insomniac » Sat Sep 06, 2008 8:19 pm

Yeah I've made a few pulsejets like that (look at my youtube channel). I was thinking more of a WHOOSH.... long delay... WHOOSH...long delay etc. I tried it, and it ALMOST worked. It would go whoosh, and stay lit, but it would also have a small flame inside the can, at the small intake hole. This stopped it getting air back in and going off again. If I used the blowtorch to blow out the flame (ironic huh?) it would do the 'delay... whoosh' cycle again, but it would light the flame in the intake again. If I could find a way to stop that happening, it would make a pretty interesting little device.
  • 0

I wonder how much deeper the ocean would be without sponges.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.

Add me on msn!!! insomniac-55@hotmail.com
User avatar
Insomniac
Major General
Major General
 
Posts: 1297
Joined: Mon Dec 18, 2006 3:47 pm
Location: Australia
Country: Australia (au)
Reputation: 0

Sponsored

Sponsor
 


Return to Non-Spudgun Related Discussion

Who is online

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

Reputation System ©'