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 77 users online :: 4 registered, 0 hidden and 73 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

Super sonic Potato Gun

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

Unread postAuthor: sgort87 » Sat Aug 12, 2006 8:53 am

SuperSonic wrote:The above poster's points may or may not be valid, but naturally I did some background checks before reading anything:

markfandal's Xanga Site wrote:+ Did you lose someone you really loved?: Yes.
+ How many times have you fallen in love? Never.



Paradoxically dumb? I think so.

Mark, get off the net, go read some books. Come back later.


You know what it means when you nitpick unrelated topics with someone SuperSonic? It means you have run out of ammunition and you will do anything to get back at someone even if they are right, just because they made you look like a complete moron.

Besides, you point is based off of a fallacy. You don't need to be IN love with someone to love them. Tell me, when you lost your mother when she committed suicide because she was sick of you, did you fall IN LOVE with her? Then again, I guess I wouldn't doubt that's all truth.

SuperSonic, get off the net, go hang yourself. Come back never.
  • 0

<a href="http://www.launchpotatoes.com"><img src="http://www.launchpotatoes.com/images/uploads/logo2.PNG"></a>
http://www.LaunchPotatoes.com
User avatar
sgort87
Donating Member
Donating Member
 
Posts: 1038
Joined: Sun Sep 18, 2005 10:32 am
Location: Lockport, Illinois
Country: United States (us)
Reputation: 1

Unread postAuthor: Steve- » Sun Aug 13, 2006 1:42 am

geez, thats pretty harsh.

ANYWAYS i'm not getting involved but i do have a question

since the helium atoms are smaller than the air atoms, won't it leak more??

so my question is: is there anything special that you would have to do to put helium in your pneumatic, like would the helium seep through the teflon taped shrader valve and stuff???

ps. I can never take you seriously with that avatar. I know that was a pretty bad diss (a little harsh tho) but all I can do is laugh.
  • 0

Canada Kicks Ass eh?
User avatar
Steve-
Specialist
Specialist
 
Posts: 55
Joined: Tue Jul 25, 2006 2:30 pm
Location: Vancouver BC. Canada Yeah Woo Hoo eh?
Reputation: 0

Unread postAuthor: mark.f » Sun Aug 13, 2006 6:33 am

You have a good question Steve.

Helium is actually used in the industry checking for leaks. An inflated balloon actually has helium going right through the walls, (albeit slowly).

But, if you made your pneumatic properly, I doubt it could get through a properly teflonned seal. If it does, it will be a VERY slow leak, which won't even be noticeable, (even with soap water).
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3465
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: Nereth » Sun Aug 13, 2006 8:13 am

hey sgort, i would assume judging by supersonics post that he is infact joking around. He admits it himself:

"The above poster's points may or may not be valid, but naturally I did some background checks before reading anything:"

I seriously wouldnt take it personally if he said something like that to me. Its just a laugh.

Also, someone answer the question on why air cant go faster than sound. Its bugging me.

Oh and steve, there are no 'air atoms', air is just a mix of different atoms, chiefly nitrogen, then oxygen, argon,etc. You may have known that and you just said air atoms as a generalisation, but i figured id point it out anyway.
  • 0


Nereth
Private
Private
 
Posts: 18
Joined: Sun Aug 06, 2006 8:08 am
Reputation: 0

Unread postAuthor: carlbelcher » Sun Aug 13, 2006 5:02 pm

You two (Steve- and Nereth) don't understand! SuperSonic wasn't joking in fact he was very serious it you look at his post history all he does is flame! Don't defend him, he has contributed NOTHING to this forum. If you really think that we are being too harsh then maybe you should join him!
  • 0

Is your Google.com Broken?!
User avatar
carlbelcher
Donating Member
Donating Member
 
Posts: 532
Joined: Mon Jun 12, 2006 6:54 pm
Reputation: 1

Unread postAuthor: CpTn_lAw » Sun Aug 13, 2006 5:49 pm

Some people are scared of direct relations with others, that's why they go in the forums, they can say whatever they want, there wont be any "direct" confrontation. To these guys, i wanna say that it isn't a way to gain trust in yourselves. Read some books, observe the others and stop bothering people just for showing that you're here.


Now for the topic, no one has clearly answered the question. you could break the sound barrier with a pneumatic filled with helium, or air.
The reason for Helium is that it is a very light gas, and at the same pressure, there will be a lot more atoms in the chamber causing more hits. the pressure isn't higher because the atoms are smaller.
With air, speed of sound is higher when the pressure is higher, as well as speed of sound is lower when you dicrease the pressure. making this, the projectile will accelerate to a certain speed, pushed by an air quantity that tends to expand faster than the speed of sound. the reason why you have to put a lot of air pressure to raise the speed of sound with a projectile, is that the projectile has a mass. considering that the pressure drops every single mm the projectile get's down the barrel, the expansion speed of the pressurized-air dicreases. that makes the force behind the projectile to dicrease too.
So in order to reach the speed of sound, you need a very high C:B ratio, so that there is a lot more air than needed, so that the pressure dicreases very small when firing.

hope i helped a bit for your question ;)
  • 0

User avatar
CpTn_lAw
Brigadier General
Brigadier General
 
Posts: 987
Joined: Sun Sep 11, 2005 9:10 am
Location: France
Reputation: 0

Previous

Return to General Spud Cannon Related

Who is online

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

Reputation System ©'