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 85 users online :: 5 registered, 0 hidden and 80 guests


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

Registered users: Bing [Bot], Doodmens, 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

Fan Size and Placement

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

Fan Size and Placement

Unread postAuthor: BlackWater18 » Sun Jan 20, 2008 2:57 pm

Hi,

I'm building a new potato cannon and I decided that I wanted to up my cannon a little and put a fan in it. Not really fancy, just to try something new.
Oh, and I do know that you need brushless CPU fans.

So my first question is, how big of a fan should I use? I have a 3in Dia. Chamber that I will be mounting the fan in. And if my dad can't get the fan from his work. Where could I buy it? Would Radio Shack have them?

Second, what is the best way to mount the fan in Chamber?

Thanks for your time.

-BlackWater18
  • 0


BlackWater18
Private
Private
 
Posts: 20
Joined: Sun Jan 20, 2008 2:47 pm
Reputation: 0

Unread postAuthor: LikimysCrotchus5 » Sun Jan 20, 2008 3:31 pm

1) Radio shack has them but are kind of expensive. You can also order fans from bcarms that are way cheaper. you will see an icon that looks like an explosin ontop of the recent posts, thats where you will find the icon.

2) You can epoxy it in place or you can make grooves into the inside of the chamber where the corners of the fan can go.

It also depnds on the size of the fan
  • 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: psycix » Sun Jan 20, 2008 4:05 pm

Most PC fans are brushless, you can get em in almost all PC-components stores and also on the BCarms.

The way I put my fan in is by shaving the corners round, until it just didnt fit in and then squeezed it in with alot of force.
Its very very tight and sits in very stable and nice.
No glueing or stuff needed.
  • 0

Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

Spudfiles steam group, join!
User avatar
psycix
Donating Member
Donating Member
 
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands
Reputation: 0

Unread postAuthor: BlackWater18 » Sun Jan 20, 2008 4:30 pm

Alright, thanks

Also, do I need to cover the wires with something, so they don't get fried?


-BlackWater18
  • 0


BlackWater18
Private
Private
 
Posts: 20
Joined: Sun Jan 20, 2008 2:47 pm
Reputation: 0

Unread postAuthor: SpudMonster » Mon Jan 21, 2008 2:40 am

The wires will fry, just route them so they don't touch each other. In my cannon (332 C.I. Propane fueled) the insulation on the wires has charred, but they aren't shorting out.

I recommend getting the biggest fan you can fit inside of your chamber (within reason)

My fan is a 3" in a 4" chamber. You will likely have to shave the corners of the fan some. Go slowly and carefully so you can get a good press fit. Then, pull it out, sand the areas the fan touches the inside of the chamber, and gorilla glue it in place. Mine hasn't moved at all after over 300 shots.
  • 0

User avatar
SpudMonster
1st Lieutenant
1st Lieutenant
 
Posts: 250
Joined: Mon Aug 08, 2005 5:54 pm
Reputation: 0

Unread postAuthor: psycix » Mon Jan 21, 2008 12:02 pm

BlackWater18 wrote:Alright, thanks

Also, do I need to cover the wires with something, so they don't get fried?


-BlackWater18


I did not cover the wires myself... never had fried wires.
But make sure they dont short-circuit (ofcourse....)

I also want to recommend you to place your fan near the back.
If you would place it to much near the barrel opening, all air dumped from the chamber will have to pass trough the fan, probably pulling off the fan blades. And your fan will have a short lifetime....
  • 0

Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

Spudfiles steam group, join!
User avatar
psycix
Donating Member
Donating Member
 
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands
Reputation: 0

Unread postAuthor: BlackWater18 » Mon Jan 21, 2008 1:52 pm

Alrighty, thanks for the info.
  • 0


BlackWater18
Private
Private
 
Posts: 20
Joined: Sun Jan 20, 2008 2:47 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: ralphd » Mon Jan 21, 2008 6:40 pm

Try Staples for a fan. I found some in their computer department..pretty cheap too but free is also good.
  • 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 Discussion

Who is online

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

Reputation System ©'