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 50 users online :: 4 registered, 0 hidden and 46 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Pop-sci has been on here...

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

Pop-sci has been on here...

Unread postAuthor: john bunsenburner » Sun Jan 24, 2010 3:49 am

The last Popular Science magazine i've been reading had not one but TWO spudgun related reports!

One was of a hydrogen powered launcher, along the lines of a light gas gun, just that natural gas heats the hydrogen to crazy temperatures(instead of black powder compressing it). The hydrogen then accelerates a projectile down a 3,300foot barrel before the half ton projectile leaves the muzzle at predicited 13 000mph. The projectile is said to experience 5000Gs during the ride. The entire gun will be submersed under the ocean. Its use? To fling supplies into space for 250$ instead of 5000$ per pound. The project would cost 500$ million, and could be done in seven years from now.

The other, project was built by two mates. It consists of two huge propane tanks(1000gallons each) welded to a 100 foot metal barrel via a 'T shaped fitting', the valve is a butterfly valve. It is said to operate at 100psi and shoot anything that fits into the barrel. To access the breach they use a door at the start of the barrel. The construction in mounted onto a trailer mounted elevation platform. The babe weighs 8tons IIRC and runs on 100psi, it will participate in THE pumpkin chuckin competition in Delaware.
  • 0

Last edited by john bunsenburner on Sun Jan 24, 2010 4:08 am, edited 1 time in total.
"Did you ever stop to think that out of the seven deadly sins envy is the only one which doesn't give the sinner even momentary pleasure"-George Will
User avatar
john bunsenburner
Major General
Major General
 
Posts: 1446
Joined: Sun Oct 19, 2008 5:13 am
Reputation: 0

Unread postAuthor: Insomniac » Sun Jan 24, 2010 4:03 am

Holy mother of... 3,300 mile long barrel? Impressive, to say the least (Or a typo :lol: )
  • 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: john bunsenburner » Sun Jan 24, 2010 4:08 am

Yup typo, thats supposed to be feet :oops: .
  • 0

"Did you ever stop to think that out of the seven deadly sins envy is the only one which doesn't give the sinner even momentary pleasure"-George Will
User avatar
john bunsenburner
Major General
Major General
 
Posts: 1446
Joined: Sun Oct 19, 2008 5:13 am
Reputation: 0

Unread postAuthor: jrrdw » Sun Jan 24, 2010 7:09 am

You better re-read that artical or find it online and link it to us. 3,300 "feet" is over a half mile long. :P
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6538
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: john bunsenburner » Sun Jan 24, 2010 10:27 am

Here Mr. I-don't-trust-anything-i-did-not-see-with-my-very-own-eyes...
  • 0

"Did you ever stop to think that out of the seven deadly sins envy is the only one which doesn't give the sinner even momentary pleasure"-George Will
User avatar
john bunsenburner
Major General
Major General
 
Posts: 1446
Joined: Sun Oct 19, 2008 5:13 am
Reputation: 0

Unread postAuthor: psycix » Sun Jan 24, 2010 11:11 am

Sweet.
Kinda weird, heating the hydrogen and THEN opening a valve.
That will need to be timed precisely. Would it be a "valveless" valve?
  • 0

Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

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

Unread postAuthor: john bunsenburner » Sun Jan 24, 2010 11:17 am

I don't see why they don't put a vacume in the barrel to aid acceleration. I like the fact they reuse the hydrogen instead of letting it go to waste, though the whole idea sounds a tad too scifi to ever be made real, but pretty cool nonetheless.
  • 0

"Did you ever stop to think that out of the seven deadly sins envy is the only one which doesn't give the sinner even momentary pleasure"-George Will
User avatar
john bunsenburner
Major General
Major General
 
Posts: 1446
Joined: Sun Oct 19, 2008 5:13 am
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: D_Hall » Sun Jan 24, 2010 2:19 pm

The problem with gun-launch of objects intended for orbit is that you have to have a rocket as part of your payload. Without the rocket, you put yourself into an elliptical orbit that unfortunately brings you to perogee below the surface of the Earth (that's bad, mmmkay?). To avoid this, you must modify your orbit once clear of the Earth's atmosphere. This requires a rocket motor.

Suddenly, your "simple" system just got a whole lot more complicated....especially when you factor in the requirement to survive 5000 Gs.

Gun-launch to orbit has been a pie in the sky dream for a lot of years. I predict it will continue to be at the time of my death.
  • 0

Last edited by D_Hall on Sun Jan 24, 2010 2:28 pm, edited 1 time in total.
Simulation geek (GGDT / HGDT) and designer of Vera.
User avatar
D_Hall
Donating Member
Donating Member
 
Posts: 1759
Joined: Thu Feb 07, 2008 7:37 pm
Location: SoCal
Reputation: 6

Unread postAuthor: jackssmirkingrevenge » Sun Jan 24, 2010 2:26 pm

  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: D_Hall » Sun Jan 24, 2010 2:30 pm

LOL... Looks like we've had this conversation before. :lol:
  • 0

Simulation geek (GGDT / HGDT) and designer of Vera.
User avatar
D_Hall
Donating Member
Donating Member
 
Posts: 1759
Joined: Thu Feb 07, 2008 7:37 pm
Location: SoCal
Reputation: 6

Unread postAuthor: rp181 » Sun Jan 24, 2010 2:34 pm

I agree. Popular science is vry bad at this kind of stuff.
For example, every single issue (excluding one or two) has something about the "new personal jet is finally here".

while where at that, Im going to bet thats not going to happen for a long time, thats a total infrastructure change.
  • 0

User avatar
rp181
Brigadier General
Brigadier General
 
Posts: 1090
Joined: Thu Dec 13, 2007 8:47 pm
Reputation: 0

Unread postAuthor: john bunsenburner » Sun Jan 24, 2010 3:01 pm

I enjoy reading it, mainly because it is the only english bit of writing i get my hands on beyond school books, makes me feel...international. Also here and there they have things that are intresting, or so damn absurd that it is entertaining. I am a big fan of T.Grey's reports which are chemistry focused, and the mythbuster type of nerdyness which is captured very well within the the words of pop sci.
  • 0

"Did you ever stop to think that out of the seven deadly sins envy is the only one which doesn't give the sinner even momentary pleasure"-George Will
User avatar
john bunsenburner
Major General
Major General
 
Posts: 1446
Joined: Sun Oct 19, 2008 5:13 am
Reputation: 0

Unread postAuthor: ramses » Sun Jan 24, 2010 7:58 pm

Apparently you didn't read the table of contents. They gave a link to "A Pneumatic Hot-Dog Cannon"

It uses a tiny solenoid valve to actuate an air cylinder, which opens a 1" butterfly valve... And they claim that this is better than a sprinkler valve...
  • 0

POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name :D
User avatar
ramses
Major General
Major General
 
Posts: 1679
Joined: Thu May 29, 2008 6:50 pm
Reputation: 3

Return to General Spud Cannon Related

Who is online

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

Reputation System ©'