mcarterbrown.com  

General Chat MCB's Coffee House: Pull up a seat, and grab your favorite caffeinated beverage. Non-paintball related chat within.

Reply
 
Thread Tools
Old 02-11-2013, 10:44 PM   #1 (permalink)
Seasoned Member
 
Join Date: Nov 2006
Location: Cold Lake, Alberta, Canada

Supersonic ping-pong ball gun

The concept of using a nozzle to accelerate gas flow and increase the speed of the ball is interesting.
I don't have the education to figure out if it makes sense or not. Flow through a nozzle should, according to Bernoulli, not change the amount of energy transferred so on the surface it shouldn't make a difference, but...


Supersonic Ping Pong Ball Brain Waves - YouTube&fs=1" width="644" height="390">Supersonic Ping Pong Ball Brain Waves - YouTube&fs=1" />Supersonic Ping Pong Ball Brain Waves - YouTube">http://www.youtube.com/watch?v=Supersonic Ping Pong Ball Brain Waves - YouTube

My browser doesn't want to show the embedded Youtube vid so here's the link if it also doesn't work for you: Supersonic ping-pong ball gun
__________________
"Now is no time to be making new enemies" - Voltaire (When asked on his deathbed by a priest to renounce the devil and turn to God.)
Surestick is offline   Reply With Quote
Old 02-11-2013, 10:56 PM   #2 (permalink)
Lathe Fiend
 
sniper42's Avatar
 
Join Date: Sep 2008
Location: Huntington Beach, CA

Here you go:

http://www.youtube.com/watch?v=I9zBGgpzl0I
__________________
Anonymous Assassins Paintball TeamJust look for the pink shirts

Quote:
Originally Posted by BigOldSkool View Post
CNC's are for nerds...
MCB Feedback


Sheridan Misc FS: Grips, bodies
sniper42 is offline   Reply With Quote
Old 02-11-2013, 11:14 PM   #3 (permalink)
Post Whore
 
Join Date: Feb 2011
Location: PEI, Canada

Interesting. He ends it with doubling his negative on the warning about doing it at home... Dude with all the education told me to try this at home.

As for the nozzle's effect, it has been over a decade since I really did much with rockets, but I believe the idea centres around accelerations and efficiency. A plain nozzle is going to release energy in a less efficient pattern, basically fighting against itself for velocity. The shape of the nozzle compresses the flow, accelerating it, and releasing it at a higher velocity than it would otherwise.

It is a neat idea, and I've always wondered if rocket-jetting could be used to generate more efficient firearms producing higher velocities. Never did get around to that project.
__________________
Quote:
Originally Posted by Lrrpie-CT View Post
I destroy drives for clients all the time. Sometimes, intentionally.
Luckless is offline   Reply With Quote
Old 02-11-2013, 11:18 PM   #4 (permalink)
Banned
 
Join Date: Oct 2006

who wants to mill a custom bolt to try this
heinous is offline   Reply With Quote
Old 02-12-2013, 01:45 AM   #5 (permalink)
I see dead people
 
chopper duke's Avatar
 
Join Date: Jun 2008
Location: Metro ATL

CCM Fan
I've been studying (off and on as I get time) the same principal for a more efficient nelson valve.
__________________
chopper duke is offline   Reply With Quote
Old 02-12-2013, 02:09 AM   #6 (permalink)
Banned
 
alpha434's Avatar
 
Join Date: May 2008

Quote:
Originally Posted by heinous View Post
who wants to mill a custom bolt to try this
Did someone ask for a 3d printer?


Something tells me that the jet nozzle doesn't apply to us. Why? Because it only functions when a high pressure vessel is dumping into a low pressure vessel. In our situation, there's a paintball that seals the low-er pressure side until it's far enough down the barrel that a jet stream isn't influencing it anymore.

The ping pong ball is influenced by the device because it's density is so low, and it's freedom to accelerate is so high. And they're aiming for 750 miles per hour.

Let's work on the vacuum sealed breech, instead.
alpha434 is offline   Reply With Quote
Old 02-12-2013, 02:10 AM   #7 (permalink)
Banned
 
Join Date: Oct 2006

Quote:
Originally Posted by chopper duke View Post
I've been studying (off and on as I get time) the same principal for a more efficient nelson valve.
is it viable? i'd imagine an in-line design would leave the power tube plenty restricted already and leaving not enough room for that kind of design.
heinous is offline   Reply With Quote
Old 02-12-2013, 01:49 PM   #8 (permalink)
Post Whore
 
Join Date: Mar 2010
Location: Bronson, FL

WTH!! He mentions they have high speed footage....but he did not include any of it! complete PHAIL

but a cool one
Brother Jerry is offline   Reply With Quote
Reply

  mcarterbrown.com » General » General Chat

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


All times are GMT -4. The time now is 03:12 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO
© MCB Network LLC