Search found 14 matches

by Jose Arcadio Buendia
Thu Jan 30, 2014 3:38 pm
Forum: Combustion Cannons
Topic: Newport butane refill cans
Replies: 3
Views: 707

Re: Newport butane refill cans

Sounds like it's either propane, or not as pure as they claim it to be. Yes, it is propane. I searched for the MSDS of the Newport butane and it contains propane. http://www.e-hygienesystems.com/coshh/sheets/Butane%20Lighter%20Fuel%20250ml%202.pdf I tried filling the syringe for 3.2% mixture with t...
by Jose Arcadio Buendia
Sat Jan 25, 2014 4:23 pm
Forum: Combustion Cannons
Topic: Newport butane refill cans
Replies: 3
Views: 707

Newport butane refill cans

I bought a 250ml/139g Newport butane refill can. I measured with a syringe 9.5ml of butane for a ~3.2% mixture in my 290ml chamber combustion cannon (I measured the chamber volume using water and a syringe) and it did not fire. The cannon has a chamber fan so an equal mixture within the chamber is n...
by Jose Arcadio Buendia
Fri Jan 24, 2014 6:58 pm
Forum: Pneumatic Cannons
Topic: All Steel and Brass Ball Valve Gun
Replies: 3
Views: 961

Re: All Steel and Brass Ball Valve Gun

Looks nice. In the future, if you want to upgrade the ball valve get a quick exhaust valve. They are inexpensive and have one of the best opening times.
by Jose Arcadio Buendia
Thu Jan 09, 2014 5:42 pm
Forum: Hybrid Cannons
Topic: New hybrid cannon
Replies: 30
Views: 4112

Re: New hybrid cannon

Is that a PVC union in the breech?
by Jose Arcadio Buendia
Sun Jan 05, 2014 9:31 pm
Forum: Miniature Guns
Topic: Piston valve mini cannon
Replies: 2
Views: 1710

Re: Piston valve mini cannon

Thanks for the advise. I changed the spring for this piece of hose to limit the movement.
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by Jose Arcadio Buendia
Tue Dec 31, 2013 8:51 pm
Forum: Miniature Guns
Topic: Piston valve mini cannon
Replies: 2
Views: 1710

Piston valve mini cannon

This is my second piston valve mini. The first I dismantled it because it didn't have enough chamber volume. I use a carbonated drink bottle for this one to have more volume and very light weight. I had a combustion mini, but this cannon even a 40 psi beats it. I was quite surprised about the power ...
by Jose Arcadio Buendia
Fri Dec 27, 2013 8:47 am
Forum: Combustion Cannons
Topic: My second combustion cannon
Replies: 3
Views: 1340

Re: My second combustion cannon

How did you attach the fan to the plug? Looks like tubes wedged into the cap. It is pieces of tube from a windex bottle. I wrapped some tape around them so they would fit snugly on the cap Syringe fuelling FTW! Yes, who needs those fancy propane tanks and reliable metering systems attached to their...
by Jose Arcadio Buendia
Thu Dec 26, 2013 1:20 pm
Forum: Combustion Cannons
Topic: My second combustion cannon
Replies: 3
Views: 1340

My second combustion cannon

This is my second combustion cannon: Update: http://i39.tinypic.com/2v13e4l.jpg I bought some pipe and made barrel extension; I sanded down the division in the coupling so there would be no space between the two pipes. It has now a 3ft barrel and a 0.75 C:B ratio. Here is a damage picture using a PV...
by Jose Arcadio Buendia
Wed Dec 25, 2013 7:24 pm
Forum: Off-Topic Hobbies
Topic: PVC Bow
Replies: 2
Views: 972

PVC Bow

Has anyone here made a PVC bow? I made one and it shoots well enough. I used 1/2" sch 40 pvc. I'll make another from 1" pipe. Its incredible the versatility of PVC pipe.
by Jose Arcadio Buendia
Wed Dec 25, 2013 3:30 pm
Forum: Off-Topic Hobbies
Topic: Combustion Water Bottle Rockets
Replies: 33
Views: 3825

Re: Combustion Water Bottle Rockets

Has anyone tried HHO (gas mixture produced by electrolysis of water) bottle rockets. I've seen some people on YouTube fill with HHO and ignite 2 liter bottles. I've done it with a thick 60mL bottle. Even at that small amount it is very loud.
by Jose Arcadio Buendia
Wed Dec 25, 2013 1:44 pm
Forum: Miniature Guns
Topic: A question about making a mini coaxial
Replies: 6
Views: 2078

Re: A question about making a mini coaxial

Can you tell us a bit about that compressor. Is it cordless? 12v? How much pressure will it deliver? It is cordless. It uses detachable 18v batteries(ryobi one+ system) that are interchangeable with other electric tools. It is supposed to go up to 150 psi, however I don't know how accurate the gaug...
by Jose Arcadio Buendia
Wed Dec 25, 2013 8:28 am
Forum: Ammo & Parts
Topic: How much pressure can this safely hold?
Replies: 2
Views: 974

How much pressure can this safely hold?

How much pressure can this safely hold?
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I heated one side of a 3/4" sch 40 PVC coupling and inserted a soda bottle cap. After it cooled I took out the cap and applied epoxy to the coupling and cap.
by Jose Arcadio Buendia
Tue Dec 24, 2013 3:20 pm
Forum: Miniature Guns
Topic: A question about making a mini coaxial
Replies: 6
Views: 2078

Re: A question about making a mini coaxial

I did some testing and finally got it to work. I couldn't go above 60 psi because above that the connection between the hose and the compressor can unexpectedly disconnect. Heres a video: [youtube]http://youtu.be/Cny1Sk1QivA[/youtube] I had to change the piston for a molded hot glue piston and add a...
by Jose Arcadio Buendia
Sun Dec 22, 2013 8:14 pm
Forum: Miniature Guns
Topic: A question about making a mini coaxial
Replies: 6
Views: 2078

A question about making a mini coaxial

This is my first, but unfinished mini coaxial piston pneumatic: http://i41.tinypic.com/3029hr5.jpg http://i43.tinypic.com/2qbhk0n.jpg http://i41.tinypic.com/kccp3q.jpg The chamber is made from 1/2 in. sch. 40 PVC pipe. The barrel is the body of a bic pen. I used the neck of a soda bottle on the end ...