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TAC 6 How to video

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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TAC 6 How to video

Unread postAuthor: chenslee » Mon Jan 24, 2011 11:35 am

Haven't posted in a while. This is the instruction video for the what evolved from the 'ol contest cannon (which can barely be seen in the upper right corner).

[youtube]http://www.youtube.com/watch?v=6afbVWyuT1I[/youtube]
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Unread postAuthor: jackssmirkingrevenge » Mon Jan 24, 2011 12:03 pm

kicking table away win!

Is this the video you supply to customers :D
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Unread postAuthor: chenslee » Mon Jan 24, 2011 12:59 pm

I totally meant to scoot the table and instead wrecked the whole thing.

Customers get provided with a detailed instruction sheet taped to the barrel. The marketing department suggested that some people can't, or can't be bothered to read so I made a short video.

The beanie is to cover my bald spot and make me look hipper and cooler than I really am.
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Unread postAuthor: Gun Freak » Mon Jan 24, 2011 5:56 pm

You can also shoot upside down.

However, you cannot aim upside down, only dent the garage door :D
The beanie is to cover my bald spot and make me look hipper and cooler than I really am.

Don't worry, we all think you're awsome! :)
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Unread postAuthor: ramses » Mon Jan 24, 2011 6:12 pm

That's quite awesome. I take it you're using a venturi for fueling? I don't think you posted that in your contest thread.
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Unread postAuthor: chenslee » Tue Jan 25, 2011 11:05 am

Ramses, yeah it's venturi. It's simple and always works.
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Unread postAuthor: Gaderelguitarist » Tue Jan 25, 2011 12:01 pm

kicking table away win!


Who needs tables anyways.

Since timing is rather key to the functioning of this launcher, wouldn't it be beneficial to install some sort of timing mechanism that beeps or lights up once the optimal fuel ratio has been achieved? One could even go so far as to make fueling a one touch motion, leaving fuel addition to a circuit of some sort. I'm not saying I could do it (electronics might as well be braile), but it would be the next step I think.
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Unread postAuthor: POLAND_SPUD » Tue Jan 25, 2011 12:35 pm

Ramses, yeah it's venturi. It's simple and always works
Is it possible to shorten filling/venting time by increasing the flow ?

uhmm ok 4 seconds is OK for most ppl, but don't you think that if you shorten that to 0.5 second you could call it a semiauto ?
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Unread postAuthor: chenslee » Tue Jan 25, 2011 12:49 pm

I've thought about doing this, but not only would it add what I feel is an unnecessary amount of additional complexity, it would substantially increase the price.

The nature of the venturi is that it is impossible to over fuel once the regulator is dialed in.

If anything, I would add an electric lockout to prevent unauthorized use or accidental discharge. I can't tell you how many times I've shocked the piss out of my hands and once I fire-balled my face.
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Unread postAuthor: chenslee » Tue Jan 25, 2011 12:54 pm

It ended up that the most cost effective solution to fueling was to just scavenge the venturi off a Bernzomatic blowtorch. It unfortunately limits the fuel and air flow. Adding more venturii or making a larger one would enable faster fueling, but cost more.

I've got a design in the works that does this, but I haven't pulled the trigger on prototyping it yet.
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Unread postAuthor: Technician1002 » Tue Jan 25, 2011 1:13 pm

I have been looking at the design and looking to see if it would be possible to modify it so the pump action pumps in a volume of air (air pump) and at the same time operate a fuel meter like is on the ShureShot launchers. It would enable fast pump action and would meter the air and fuel together in a fuel and air purge stroke.

Maybe with your resources, you will beat me to building one.
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Unread postAuthor: POLAND_SPUD » Tue Jan 25, 2011 1:27 pm

If anything, I would add an electric lockout to prevent unauthorized use or accidental discharge. I can't tell you how many times I've shocked the piss out of my hands and once I fire-balled my face.
A simple limit switch is probably the simplest solution
Image
Though you'd have to make sure that it won't arc

ohh and there are key lock switches tooImage
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Unread postAuthor: chenslee » Tue Jan 25, 2011 2:19 pm

@Technician1002

That was actually my first prototype. It didn't work very well.
http://propanetennisballcannon.blogspot.com/2009/04/flames-shoot-out_08.html

There are a couple of reciprocating fueling designs out there, but you grossly overestimate my resources.

I've kicked around something along these lines:
Image

And then there is this beast:

Image

@ POLAND_SPUD

That key switch is EXACTLY what I had in mind.
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Unread postAuthor: POLAND_SPUD » Tue Jan 25, 2011 4:10 pm

http://propanetennisballcannon.blogspot.com/2009/04/flames-shoot-out_0 8.html
LOL
nice diagrams I almost jizzed myself

it looks a lot like the design I want to use for the semiauto hybrid

Nice... you could use one 3 way valve to replace the two 2 way valves
Image
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Unread postAuthor: chenslee » Tue Jan 25, 2011 4:27 pm

@ Poland - I needed a way to actuate a valve using air pressure. Most valves are air piloted, not actuated. The Clippard components allowed me to do this.

All this got dumped for the insanely simple current setup:

Image

Hell, I don't even have a gauge on it anymore.
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