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In need of opinions

A place to ask general spud cannon related questions.
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In need of opinions

Unread postAuthor: Spedy » Sat Jun 30, 2007 8:43 pm

I have seen numerous "starter" launcher plans just about everywhere, but I don't know if I should build a pneumatic or a combustion as my first cannon.

What do you recommend?
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Unread postAuthor: 666lucky693 » Sat Jun 30, 2007 8:49 pm

pneumatic they are a little bit harder but they have so much more power than combustion so they are alot funner than a combustion i just made a new
one today here is the link to it http://www.spudfiles.com/forums/my-new- ... t9167.html pm me and ill make u designs to make one like mine and u will probally have all the stuff u need for it at ur house so yea talk to me if u want the plans for one like mine it is a paintball cannon and it can shoot marbles
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Unread postAuthor: Flying_Salt » Sat Jun 30, 2007 8:57 pm

A combustion is more fun for a first cannon, and it's safer to start with a combustion because you're just learning how to work with pvc and the like. A pneumatic can be more powerful and will work 100% of the time, but a combustion is safer for a first one, plus you don't have to worry about finding a spot to put the schrader in and you won't have to pump it up.
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Unread postAuthor: Modderxtrordanare » Sat Jun 30, 2007 9:05 pm

I started out with a pneumatic. It was super fun shooting raquet balls as far as I could see.


It really isn't hard to make a pneumatic over a combustion, as long as you do some research. :wink:


Good luck. :)
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Unread postAuthor: MrCrowley » Sat Jun 30, 2007 9:06 pm

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Unread postAuthor: 666lucky693 » Sat Jun 30, 2007 9:11 pm

every one loves pneumatics because they go far and fire 100% of the time unlike combustions u have alot of variables to get right to get it to fire
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Unread postAuthor: Fnord » Sat Jun 30, 2007 9:26 pm

If you are looking for something mobile - something you can just throw in the car and shoot anywhere, go with a combustion.
If you want more power, and don't mind using a bike pump a lot or lugging a compressor around, go with a pnuematic.

Both types of basic guns can be made easily, but a pneumatic can be a bit harder as you can't have any[major] leaks.
Combustions are also good if you like lots of noise.
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Unread postAuthor: goathunter » Sat Jun 30, 2007 9:29 pm

Basic combustion for starters.That will get you the spud flingin' bug.And is just fine for starting off.They provide lots of entertainment without the equipment to lug around.
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Unread postAuthor: 666lucky693 » Sat Jun 30, 2007 9:40 pm

make a mini if u want to mess around and only have a few minuets
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Unread postAuthor: Spedy » Sat Jun 30, 2007 9:43 pm

Okay then, I think I'm just gonna find out for myself. I'll build both the basic designs I have, do some tests, and post the results. Range, ease of operation, ect, but I have none of the dohickeys nessicary to measure speed. ($6.50 a week is a long time to save up for a chrono...)

Incase you are wondering what the models I'm going to build are: they are here:

http://www.advancedspuds.com/blseries.htm
http://members.aol.com/sph911/spud/basic.html
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Unread postAuthor: potatoflinger » Sat Jun 30, 2007 9:45 pm

I think that you should start with a hybrid. Just kidding, start with a pneumatic, they work 100% of the time, they have a lot more power than combustions, and they really aren't that hard to build.
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Unread postAuthor: 666lucky693 » Sat Jun 30, 2007 9:56 pm

nice choices on the designs i like the idea of breach loading cannons 8)
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Unread postAuthor: Pete Zaria » Sun Jul 01, 2007 4:23 am

Most of us started with a simple combustion.

Having worked with both, pneumatics have the opportunity to be more powerful when properly designed, and are more reliable than a "basic" combustion.

However, my over/under combustion with metered propane sees much more use than any other gun I have (except my shotgun and .22 ... lol) because it's portable and easier to use. I don't have to fire up the compressor or use a d@mn bike pump.... just *load, inject propane, turn on fan, fire, vent, turn off fan, repeat*. Everything's on-board (everything required to fire is built-into the cannon, except for ammo :) ).

I prefer combustions, because even if they lack the power of a pneumatic, a properly built combustion is very portable, reliable, easy to use... and the BOOM is so satisfying :) .
I'd also say combustions are easier to build because you don't need expensive pressure rated pipe - SCH40 ABS is cheap and works fine (this is a topic of much debate but I feel very comfortable recommending SCH40 ABS for a combustion. If properly assembled, it should never fail under normal circumstances).
By the way, with a 10' barrel, you can get golf balls a good 300 yards with a big combustion.... that's enough power for me :)

Peace,
Pete Zaria.
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Unread postAuthor: jimmy101 » Sun Jul 01, 2007 3:33 pm

Spedy, if you have access to a laptop, or to an old desktop PC, you can make your own chrony for a couple bucks like this.

BTW, combustion vs. pneumatic is a long standing debate. For the two guns you linked to I wouldn't be surprised if the combustion out-performed the pneumatic.
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Unread postAuthor: SpudBlaster15 » Sun Jul 01, 2007 4:40 pm

Pete Zaria wrote:I'd also say combustions are easier to build because you don't need expensive pressure rated pipe - SCH40 ABS is cheap and works fine (this is a topic of much debate but I feel very comfortable recommending SCH40 ABS for a combustion. If properly assembled, it should never fail under normal circumstances).


Unrated ABS is fine for basic combustion guns, but for a propane gun, NOOOOO. :shock: I have had a properly constructed propane powered ABS launcher explode due to a defect in the pipe. I suffered minor burns on my arm, and lost about $30 worth of parts. Unrated pipe of any kind should not be used to build advanced combustions.
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