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 36 users online :: 4 registered, 0 hidden and 32 guests


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

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

My launcher

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

My launcher

Unread postAuthor: ralphd » Tue Dec 18, 2007 10:28 pm

This is my first and it went through many changes. I have a 3" chamber that's about 115.5 cubic inches and my barrel is about 34.5" @ 1 1/2 dia. It started out using hair spray but I couldn't stand the mess. After trying every aerosol I could find the best was my wife's Suave deodorant. I then switched to propane with a meter pipe that was not mounted on the gun. It utilized a tire fill valve and the gun had a Schrader valve that was for boilers in the end cap. After a few shots I mounted the meter pipe on the gun.

Being tired of misfires I installed a combustion fan which dramatically improved performance and reliability but increased the noise. The batteries and switch are in the horizontal handle on the left side. This is my next mod; to quiet my cannon and to improve performance. I will change my cb ratio from about 1.5:1 to aprox .7:1 but will do this with either a 2", 2.5" barrel or both. Good thing I used a threaded adapter. I plan on 1 more gun but it will be with a 4" chamber and electronic spark and a fan.

Here are more pics....if you look at "SideView Left" & SideView Left 2" I used an extra doorbell button I had for my fan switch. The wire exits @ the bottom then wired to the fan through the combustion chamber. The batteries are stored in the "T" adapter which I had sealed with a cap. I took a few practice shots to make sure it stayed in place.

RearView Fan shows the fan which I had to mount there. I wanted it further in but this fan was free so beggars can't be choosey. It also explains the (3) 9volt batteries which I wired in series. It's a 24vdc fan so 27volts was close enough.

The "Igniter" pic shows the BBQ igniter which I had to "Gorilla Glue" in place because I couldn't find any that had a nut. I had a lot of problems with wires arcing and not producing a good spark. That’s why I want to try the electronic on the next one.

Thanks for the interest. No one I know appreciates the time and effort I put in this thing. I was beginning to think I came into this too late judging by the dates of posts on some of the other forums. I'm glad to see that this isn't a diminishing hobby and I'm glad that SPUDFILES was brought to my attention. Thanks.......
  • 0

Attachments
SG-11.jpg
SG-22.jpg
SG-33.jpg
SideView Left.JPG
SideView Left2.JPG
RearView Fan.JPG
Ignitor.JPG
Last edited by ralphd on Wed Dec 19, 2007 9:18 pm, edited 2 times in total.

ralphd
Sergeant Major
Sergeant Major
 
Posts: 192
Joined: Mon Dec 17, 2007 8:07 pm
Location: Niles Ohio
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Tue Dec 18, 2007 11:16 pm

very impressive for a first launcher, nice and clean - damage pics?
  • 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: LikimysCrotchus5 » Wed Dec 19, 2007 1:03 am

Yes it quite is, and alot of improvements. Lets see some action with it. :)
  • 0

4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
User avatar
LikimysCrotchus5
Brigadier General
Brigadier General
 
Posts: 1100
Joined: Tue Sep 04, 2007 10:16 pm
Reputation: 0

Unread postAuthor: BigGrib » Wed Dec 19, 2007 2:35 am

Good Job, can we see some pics from the other side (ie horizontal handle)
  • 0

Yea, that's definitely going to get you at least a tazer.

<a href="http://www.youtube.com/watch?v=AkMkGOpAF4s">DONT TAZE ME BRO.. DONT TAZE ME... AHHHH</a>
facebook.com/biggrib
User avatar
BigGrib
Colonel
Colonel
 
Posts: 652
Joined: Mon Oct 01, 2007 11:43 pm
Location: TriCities, WA
Reputation: 0

Unread postAuthor: Maniac » Wed Dec 19, 2007 1:12 pm

WHOO I love it i always have a soft spot for combustions. I think i ill use that side handle in my next combustion if i ever get to it.
  • 0

Coodude26 wrote:
People who laugh really hard at stuff that pisses you off/you getting hurt, who then say "I'm sorry, I can't stop" but you know they easily could.

Mr.C: That's not as easy as you think. It's like me kicking you in the balls and telling you to stop crying.
User avatar
Maniac
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 496
Joined: Tue Oct 23, 2007 5:55 pm
Location: Right behind you
Reputation: 0

Unread postAuthor: Hubb » Wed Dec 19, 2007 1:22 pm

Image
  • 0

User avatar
Hubb
Major General
Major General
 
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Reputation: 2

Unread postAuthor: mark.f » Thu Dec 20, 2007 9:14 am

Looks like a good first launcher to me. I like how you sealed off your electronics and piezo from the chamber, while still making it almost look as if I've got to yell at you. :wink:

If you're still having problems with the piezo, next time, add some rubber molded insulation around the ground lead when you hook the wire to it. Wrap it nice and tight with electrical tape, and you should be good. If it's still arcing, your insulation isn't good enough. You can either upgrade to some kV rated wire, (or spark plug wire), or do what I do. Use solid core copper doorbell wire. The stuff is EXTREMELY low on resistance, so it's less likely to arc, even if you've got two lengths of it right next to each other.
  • 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

Sponsored

Sponsor
 


re - igniter

Unread postAuthor: ralphd » Thu Dec 20, 2007 12:44 pm

Well, it's not separated. When I went out to buy a ignitor I couldn't find one that had a nut to secure it and I didn't think it was necessary after looking at other launchers. Have you heard of any failing? If so I guess I could seal it like I did with the battery compartment - with a cap pushed in and glued. I can probably install 2 brass screws through the cap for a arc point.
  • 0


ralphd
Sergeant Major
Sergeant Major
 
Posts: 192
Joined: Mon Dec 17, 2007 8:07 pm
Location: Niles Ohio
Reputation: 0

Return to Combustion Cannon Database

Who is online

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

Reputation System ©'