Sketchup Model Library

A place for general potato gun questions and discussions.
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dewey-1
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Sat Apr 04, 2009 4:42 pm

Updated to reflect:

BtB requested a Fill and Fire configuration.

This model has a 3/4" QEV with a tire inflator set up for the "fill & fire"
and is available with or without a gauge installed.

Check here: Pneumatic Component Library
Last edited by dewey-1 on Wed Apr 08, 2009 2:36 pm, edited 1 time in total.
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Moonbogg
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Tue Apr 07, 2009 10:19 am

Any progress in people getting interested with modelling? We have seen several examples of how it can be of benefit when designing a cannon.
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dewey-1
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Wed Apr 08, 2009 2:34 pm

Recent update:

I created for you copper users a range of copper fittings.

Sizes from 3/4" to 2" with the most commonly used fittings.

If there others wanted just let me know.

Check here: Pneumatic Component Library
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jackssmirkingrevenge
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Wed Apr 08, 2009 10:24 pm

Maybe the mods should sticky this? It's a very usedful resource for those who use sketchup and it would be a shame to see this thread lost.
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Moonbogg
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Thu Apr 09, 2009 2:33 am

perhaps most cannons aren't actually designed before they are built, therefore CAD is useless for most people?
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jackssmirkingrevenge
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Thu Apr 09, 2009 4:53 am

Moonbogg wrote:perhaps most cannons aren't actually designed before they are built, therefore CAD is useless for most people?
Personally I don't take existing fittings and see what I can do with them, rather come up with a virtual concept and see how I can adapt/create something using the materials I have to hand. This lets me flesh out more radical designs that would either have been impossible of prohibitively expensive to fabricate.

What would be cool (but involve a lot of work to come up with) is to combine these excellent models with a program like GGDT, so you could not only get an idea of the performance but also the appearance of your launcher.
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Moonbogg
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Thu Apr 09, 2009 4:14 pm

jackssmirkingrevenge wrote:
Moonbogg wrote:perhaps most cannons aren't actually designed before they are built, therefore CAD is useless for most people?
Personally I don't take existing fittings and see what I can do with them, rather come up with a virtual concept and see how I can adapt/create something using the materials I have to hand. This lets me flesh out more radical designs that would either have been impossible of prohibitively expensive to fabricate.

What would be cool (but involve a lot of work to come up with) is to combine these excellent models with a program like GGDT, so you could not only get an idea of the performance but also the appearance of your launcher.
Oh hell yes! I have wished for the same thing myself. I would love to design a cannon in 3D and then be able to add the fuel mixture to it and have the program do a complete physics calculation which tests the structural integrity of the cannon as well as perhaps even giving you a cycle count of shots before the material is likely to crack or give way.
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dewey-1
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Fri Apr 10, 2009 7:55 am

Moonbogg wrote:
jackssmirkingrevenge wrote:
Moonbogg wrote:perhaps most cannons aren't actually designed before they are built, therefore CAD is useless for most people?
Personally I don't take existing fittings and see what I can do with them, rather come up with a virtual concept and see how I can adapt/create something using the materials I have to hand. This lets me flesh out more radical designs that would either have been impossible of prohibitively expensive to fabricate.

What would be cool (but involve a lot of work to come up with) is to combine these excellent models with a program like GGDT, so you could not only get an idea of the performance but also the appearance of your launcher.
Oh hell yes! I have wished for the same thing myself. I would love to design a cannon in 3D and then be able to add the fuel mixture to it and have the program do a complete physics calculation which tests the structural integrity of the cannon as well as perhaps even giving you a cycle count of shots before the material is likely to crack or give way.
Just think! In the very near future SpudSketch 2020 will be released!

It will have 3D modeling capabilities with the legendary GGDT and HGDT interfaces available.
Optional modules availabe are Failure Mode Analysis, Thermal Stress Analysis and Optimal Power to Weight Analysis with output
available in Rendered 3D Holograms, and CNC Data formats.

This could be accomplished, but I am sure by no means that it would be available at low cost.

Let us start simple with Sketchup and get these youngsters to comprehend 3D modeling and it capabilities.

For they are are truly the ones to develop "SpudSketch 2020."

So far I have not seen any comments from any users that had requested these type of things a little over a year ago.

There were a few threads on cannon components library.
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jrrdw
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Sat Apr 11, 2009 7:51 am

Dewey-1, this is the only pic I have right now. I been real busy and haven't had time to dig out The Basterd to get pics while mounted, but I will.

You can see the hinge mounted to the 2X4, it has a bolt welded to it extended down through the pieces of 2X4's witch are the mount. The hinge is the weak point. -> is approximate tilt from center (level). The mount is attached at a angle so that the barrel down poison the hinge is fully closed. Turn radius is 360.

Image
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dewey-1
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Sat Apr 11, 2009 8:24 am

jrrdw;

I do have several ideas already using iron/steel pipe fittings and pipe. They would be used both as a trunnion for elevation and a vertical pipe for horizontal direction. The air would be fed via quick connect plug and the air supply to a receptacle. This would allow comple rotation.

It might be a good idea to find the approximate center of gravity on the cannon so you have a neutral balance point. You want the pivot point to be locate just forward of the center of gravity so the canon has a tendency to default to a position of barrel pointing upward.

If you look at my Asco Nerf Launcher you will see a tee that is welded
on to 90 degree elbow. It is also used for the front handle.

Well this tee was put there for two reasons. The first for an optional handle and the second for either a rotational mount using the vertical axis
and also for a elevation pivot point.

Hoping my explanation kind of gives you an idea.

More pictures showing over all cannon would help.
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POLAND_SPUD
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Sun Apr 12, 2009 9:51 am

hmmm what about iron fittings ?? (plizzzzzz)
Children are the future

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dewey-1
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Sun Apr 12, 2009 11:09 am

POLAND_SPUD wrote:hmmm what about iron fittings ?? (plizzzzzz)
I am working on some before you even requested.

I started on them yesterday.

Watch this thread for updates!
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POLAND_SPUD
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Sun Apr 12, 2009 12:02 pm

thx...

don't give up just becasue there are no replies... I really appreciate your contribution
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Moonbogg
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Sun Apr 12, 2009 12:15 pm

Also, there are real benefits to CAD for all of us...such as printing out full scale outlines of shapes that we can lay over wood or plastic. It has served me well in giving me a stencil to follow with a dremel or other tools.
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dewey-1
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Sun Apr 19, 2009 11:12 am

POLAND_SPUD wrote:hmmm what about iron fittings ?? (plizzzzzz)
Your wish has been answered! The Genie says you have two left! :D

Right now I have completed:

1/2 inch and 3/4 inch Sch 40 Malleable Iron NPT fittings.
1/2 inch and 3/4 inch Sch 40 Steel NPT nipple fittings.

Check here: Pneumatic Component Library

More will be added over the next few days. I will keep updating this posting as needed.
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