Login    Register
User Information
We are a free and open
community, all are welcome.
Click here to Register
Who is online

In total there are 77 users online :: 3 registered, 0 hidden and 74 guests

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

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

The Team
Global Moderators
global_moderators.png CS

bushing vs reduction piece

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
  • Author

bushing vs reduction piece

Unread postAuthor: ste hughes » Tue Nov 02, 2010 6:25 am

hi guys

building my first MAPP cannon

i have 1 cannon thats powered by hairspray which is awesome but the way i went down from 4" to 2" was pieces of plywood screwed and glued together

its not failed once!

but i dont want to go ghetto with this next cannon

problem is though i can't find a reduction piece that will go from 4" to 2" in the uk - the most it will reduce is 4" to 3" and this piece is about £30 ($50) plus the price of a bushing

so would i be ok if i use a 4" to 2.5" bushing and then use another bushing to take me down to 2"? this will cost me about £10 - that £20 i can spend on paint to make it look awesome

is this likely to be a problem - it will be properly glued and screwed just to make sure

thanks :D :D
  • 0

ste hughes
Posts: 3
Joined: Mon Nov 01, 2010 10:30 am
Reputation: 0

Unread postAuthor: Crna Legija » Tue Nov 02, 2010 7:14 am

as long as the parts you use are pressure rated to 120ish psi it would be fine
  • 0

'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Add me on ps3: wannafuk, 8/11/11 cant wait
User avatar
Crna Legija
Major General
Major General
Posts: 2333
Joined: Sun Jul 20, 2008 5:14 am
Location: australia
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Tue Nov 02, 2010 7:28 am

The plywood and glue approach isn't actually what I would consider ghetto, au contraire it's a cheap and neat solution if done properly :)

Pretty much what I did with my last large combustion, though it was mostly epoxy based.
  • 0

User avatar
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: Gaderelguitarist » Tue Nov 02, 2010 10:48 am

My two working combustions actually utilize wooden plugs to seal off the chamber. If done correctly, it can be a completely reliable build. This actually reminds me that I need to post one of those two on here. I'm rambling...

To answer your question though, yes.
  • 0

so many muchness
User avatar
Posts: 580
Joined: Sat Aug 16, 2008 9:56 pm
Location: Columbia, MD
Reputation: 0

Return to Combustion Cannon Discussion

Who is online

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

Reputation System ©'