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(...) Andrew, It is so interesting that you broached the topic of vaacume/pressure pressure at the same time as the hydraulic question. In many ways they are the same problem. Containment. With vaccume/pressure you need a switch with containable (...) (19 years ago, 21-Nov-05, to lugnet.technic, FTX)
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| | Re: Random Pneumatic idea/question
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(...) I would certainly think so. I'm very interested in this LEGO pneumatic for a hydraulic system idea. Billy. (19 years ago, 21-Nov-05, to lugnet.technic)
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| | Re: Random Pneumatic idea/question
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(...) That IS odd! And thank you for the reassurance. I have just completed attaching a load to the pump. Basically I just copied my pump and used it as my load. Using the pupm and alternating the valves and strokes, the load ram moved outward as (...) (19 years ago, 21-Nov-05, to lugnet.technic)
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| | Re: Random Pneumatic idea/question
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(...) That's the whole purpose! Methinks we'll be needing a lugnet.pneumatics and maybe a lugnet.hydraulics or a combined lugnet.fluidics, pretty soon. What say, fellas? CS (19 years ago, 21-Nov-05, to lugnet.technic)
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| | Re: Random Pneumatic idea/question
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(...) What makes you think you are a bother! I'm having fun! I beleive that the four switch/four T solution is what you need to create a hydraulic motor. The pressure+vaccume engine I posted earlier today could just as easily be a hydraulic motor, (...) (19 years ago, 21-Nov-05, to lugnet.technic)
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| | Re: Random Pneumatic idea/question
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(...) An interesting thing has happened. after asking about how one sets up the switches to access the fourth port, I decided to sit down and figure out how to do it myself. Initial progress was slow and I don't have any pictures of it, however, I (...) (19 years ago, 21-Nov-05, to lugnet.technic)
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| | Re: Pneumatic Questions
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(...) Been done here: ((URL) look like it's gonna be easy to modify. (...) Wish they would! BTW, I made a bummer in calling the hidden exhaust port the 'fourth port'. It should actually be port 3. In pneumatics nomenclature, the ports are designated (...) (19 years ago, 21-Nov-05, to lugnet.technic)
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| | Re: Pneumatic Questions
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(...) Great! Let's see how the engine runs. CSSoh (19 years ago, 21-Nov-05, to lugnet.technic, FTX)
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| | Re: Pneumatic Questions
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"Kevin L. Clague" <kevin_clague@yahoo.com> wrote in message news:Iq9H1s.2Ao@lugnet.com... (...) Has anyone tried to open up the pneumatic switch (old and new ones) to see if there is a way this 4th port could be vented into a tube and thus (...) (19 years ago, 21-Nov-05, to lugnet.technic)
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| | Re: Pneumatic Questions
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(...) Hi Andrew, Here is a schematic for an engine that combines pressure and vaccume on both piston faces. (URL) uses the four port switch I described in this thread: (URL) The image shows a compressor and air tanks for having pressure and vaccume (...) (19 years ago, 20-Nov-05, to lugnet.technic, FTX)
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| | Re: Pneumatic Questions
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(...) I found this picture on my brickshelf account. It shows the lego geometry needed to implement the four port switch. The hoses are not right, but the switch positions and lever linkages are correct. (URL) (19 years ago, 20-Nov-05, to lugnet.technic)
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| | Re: Pneumatic Questions
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(...) I'm not at home, so I can't lookup the history on this in my LEGO notebooks. I think Doug Carlson invented this. I rederived it today, because I knew it wasn't too complicated. It involves four switches and four T's. The four switches form two (...) (19 years ago, 20-Nov-05, to lugnet.technic)
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| | Re: Pneumatic Questions
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(...) Hi Billy, A LEGO pneumatic switch has four ports. You are probably familiar with the obvious three: left, center and right. The fourth port is not obvious. When you've got pressure on one port of the piston, and you switch the switch so you (...) (19 years ago, 20-Nov-05, to lugnet.technic, FTX)
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| | Re: Random Pneumatic idea/question
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(...) Is it now? Hmmmmmm. How would one go about hooking these switches to access the fourth port? Is there a website that I can visit that would give a good explanation to this? With thanks, Billy. (19 years ago, 20-Nov-05, to lugnet.technic)
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| | Re: Pneumatic Questions
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(...) I know this sounds a little naive, but what is a release-free switch, and what would it be used for? Billy. (19 years ago, 20-Nov-05, to lugnet.technic, FTX)
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| | Re: Pneumatic Questions
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(...) Ahhh, I would love to see it done :-) CS (19 years ago, 20-Nov-05, to lugnet.technic, FTX)
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| | Re: Random Pneumatic idea/question
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(...) Yes, the fourth port is an issue. It is possible to hook multiple switches to give you access to the fourth port though. (...) Kevin (19 years ago, 20-Nov-05, to lugnet.technic)
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| | Re: Other pneumatic questions.
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(...) That makes sense. I guess that over a long circuit the air in the system would loose its... uh... effectiveness at accurately sending and recieving the information from the RAM device, (I guess thats how you would say it.) and that a purely (...) (19 years ago, 19-Nov-05, to lugnet.technic)
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| | Re: Random Pneumatic idea/question
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(...) Speaking of liquids, Is it possible to replace the air in the pneumatic system to make a hydraulic system. I mean by using something like, oh say, 10 WT silicone oil? (URL) I guess not since you can't complete the circuit because of the (...) (19 years ago, 19-Nov-05, to lugnet.technic)
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| | Re: Random Pneumatic idea/question
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(...) Hi Nathan, It is possible to make a sprayer using pneumatics. Imagine how a super soaker works. You have a water tank, and an air pressure tank. You pump up pressure in the air pressure tank. Once you release that pressure, the water is (...) (19 years ago, 19-Nov-05, to lugnet.technic)
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