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 76 users online :: 6 registered, 0 hidden and 70 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Golf Ball Canon, big and LOUD

Built a combustion cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
Sponsored 
  • Author
    Message

Golf Ball Canon, big and LOUD

Unread postAuthor: MortarArmy » Sun Oct 19, 2008 7:02 pm

Not done yet, still waiting on my golfball barrel from BCARMS, but i couldnt resist trying it out.

This is my second gun, basically a redesign/scale up of the first one. salvaged a few components from the old one for this one as well.

4" chamber, measured out to 3600cc
115ml meter pipe with fixed 20psi regulator
80mm Vantec Tornado 83 CFM chamber fan running at 18v on 2 9v bats
2 gap bbq igniter ignition
threaded interchangeable barrel


the gun is WAY loud, about 10g shot gun loud. Most of that im hoping is due to the temp barrel im using which is only 2ft long. Also getting about a 10" long flame shooting out of the barrel....

I have no idea what the range is. My best shots on the old gun would push 225 yards. This one shoots past that point and is still going strong way past where i can see it. Hopefully my golfball barrel comes in this week for some real shots next weekend. Its unreal how fast the golfballs move.

The chamber fan is overkill, but it sure gets the job done. Vents the chamber in about 10seconds.

pics are cruddy, but what can ya do.

Image

Image

Image
  • 0


MortarArmy
Private
Private
 
Posts: 22
Joined: Sun Sep 16, 2007 11:45 pm
Reputation: 0

Unread postAuthor: SEAKING9006 » Sun Oct 19, 2008 7:15 pm

Those bell reducers sure do look weird. Haven't seen any with that shallow of an angle. Are they nsf-pw, by any chance?
  • 0

Completed projects:
CA1 SMSS Basic Inline
CA3 PDAB Airburst Cannon

Current Project: Bolt action rifle (25x140mm + 1in shot)

SEAKING9006
Colonel
Colonel
 
Posts: 734
Joined: Mon Jun 23, 2008 3:20 pm
Location: Texas
Reputation: 0

Unread postAuthor: MortarArmy » Sun Oct 19, 2008 7:21 pm

im sure they're DWV.

they're 4" to 2" reducers.
  • 0


MortarArmy
Private
Private
 
Posts: 22
Joined: Sun Sep 16, 2007 11:45 pm
Reputation: 0

Unread postAuthor: EphOph » Sun Oct 19, 2008 10:09 pm

My guess would be that they are DWV as well. I have some PW 2"x1.5" bell reducers and they are made with smooth curves instead of sharp angles.

I like the double length meter pipe. How do you make sure it's at the right pressure? That looks like a regulator connecting to the tank but I don't see any pressure gauge. Do you just guess/time it, or is it configured to fill at tank pressure?

Also, how long ago did you order from BCARMS? I placed an order for some golf ball pipe over two months ago and I'm still waiting for it, though I've pretty much given up on waiting and am now trying to acquire some through different methods.
  • 0


EphOph
Private First Class
Private First Class
 
Posts: 37
Joined: Wed Sep 17, 2008 5:53 pm
Reputation: 0

Unread postAuthor: MortarArmy » Sun Oct 19, 2008 11:13 pm

Its a fixed 20psi regulator from a camping stove. Its so big because ive got so little PSI, but it was cheap, so im using it.

I spoke with BC a few days ago about the shipping delay, supposedly he had a mix up with his supplier and got behind on his orders because of it. Said its taken care of now and the barrels should be going out shortly, or at least i hope so.
  • 0


MortarArmy
Private
Private
 
Posts: 22
Joined: Sun Sep 16, 2007 11:45 pm
Reputation: 0

Unread postAuthor: starman » Mon Oct 20, 2008 4:06 am

Yep, your shots are loud because of your relatively short barrel. At least a couple more feet will make a big difference in loudness as well as increased projectile performance.

MortarArmy wrote:The chamber fan is overkill, but it sure gets the job done. Vents the chamber in about 10seconds.

Why do you say the chamber fan is overkill?... :roll: It's an integral part of an "advanced combustion".
MortarArmy wrote:pics are cruddy, but what can ya do.

Wellll...you could take some that aren't...and then you don't post the ones that are... :wink: Actually only the first one is a little blurry.

I like the U shaped meter...a little different flavor there. The hose connection to the chamber is a little worrisome. I would suggest a hard piped, much shorter elbow for that.
  • 0

User avatar
starman
Donating Moderator
Donating Moderator
 
Posts: 3041
Joined: Wed Dec 12, 2007 12:45 am
Location: Simpsonville, SC
Reputation: 0

Unread postAuthor: MortarArmy » Mon Oct 20, 2008 5:44 pm

unfortunately, cell phone camera is all ive got at the moment. good camera took a trip to the electronics grave yard a while back.

Chamber fan is over kill because its an 83CFM fan, vs your typical 30cfm computer fan, this thing will literally remove chunks of flesh if you happen to touch a blade while its on....i know, ive done it more than once. its also super loud.

Whats wrong with my hose connection to the chamber? its threaded on one end, hose barb on the other. threaded end is tapped into 2 layers of PVC. I did it that way so i could be 100% sure that the fittings on the meter pipe were as tight as they could be. Also makes installation much easier.
  • 0


MortarArmy
Private
Private
 
Posts: 22
Joined: Sun Sep 16, 2007 11:45 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: VH_man » Mon Oct 20, 2008 7:14 pm

That regulator gives out low pressure, i presume? thats a huge meter volume....
  • 0

User avatar
VH_man
Major General
Major General
 
Posts: 1827
Joined: Sat Dec 09, 2006 6:00 pm
Location: New Hampshire
Reputation: 1

Unread postAuthor: starman » Mon Oct 20, 2008 7:18 pm

MortarArmy wrote:Chamber fan is over kill because its an 83CFM fan, vs your typical 30cfm computer fan, this thing will literally remove chunks of flesh if you happen to touch a blade while its on....i know, ive done it more than once. its also super loud.

Whats wrong with my hose connection to the chamber? its threaded on one end, hose barb on the other. threaded end is tapped into 2 layers of PVC. I did it that way so i could be 100% sure that the fittings on the meter pipe were as tight as they could be. Also makes installation much easier.


Because the hose becomes a part of the chamber and directly subject to the combustion forces...it's a weak point.

Re. the 83 CFM....nothing at all wrong with that. The loudness just makes for impressing the spectators.... :wink:
  • 0

User avatar
starman
Donating Moderator
Donating Moderator
 
Posts: 3041
Joined: Wed Dec 12, 2007 12:45 am
Location: Simpsonville, SC
Reputation: 0

Unread postAuthor: MortarArmy » Mon Oct 20, 2008 10:46 pm

Thats 1/4" reinforced nylon braided hose with a working PSI rating of about 300 PSI and a burst strength around 900 psi. I think im good!

Last gun used the same design, same hose, didnt have any problems.
  • 0


MortarArmy
Private
Private
 
Posts: 22
Joined: Sun Sep 16, 2007 11:45 pm
Reputation: 0

Unread postAuthor: mark.f » Tue Oct 21, 2008 10:19 am

This cannon looks pretty damned good, but I would suggest a different handle...

I like the way you've mounted the propane tank into a piece of 3" pipe, and not just slapped it on there, and I also like the project box. Good job!
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: MortarArmy » Tue Oct 21, 2008 9:40 pm

:( i like my handle. lets me fire it like a shot gun. looks ghetto, but it works.
  • 0


MortarArmy
Private
Private
 
Posts: 22
Joined: Sun Sep 16, 2007 11:45 pm
Reputation: 0

Unread postAuthor: mark.f » Wed Oct 22, 2008 9:54 am

I know, I was just commenting that it looked a little small. If that tee is 2" (which is what it looks like), the bottom of my hand would be hanging off the end of it.
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: starman » Wed Oct 22, 2008 10:59 am

MortarArmy wrote:Thats 1/4" reinforced nylon braided hose with a working PSI rating of about 300 PSI and a burst strength around 900 psi. I think im good!

Last gun used the same design, same hose, didnt have any problems.


I'm familiar with the materials, it's not good practice.

You seem a little defensive regarding other's suggestions. There's no need to be. You've built a decent cannon here and posted it for opinion from other spud gunners. Maybe give em a little space...
  • 0

User avatar
starman
Donating Moderator
Donating Moderator
 
Posts: 3041
Joined: Wed Dec 12, 2007 12:45 am
Location: Simpsonville, SC
Reputation: 0

Unread postAuthor: mark.f » Wed Oct 22, 2008 3:05 pm

starman, others have used hose for connecting a meter pipe to their cannon before. It doesn't do any harm.
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Next

Return to Combustion Cannon Database

Who is online

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

Reputation System ©'