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(...) Airflow is what causes this. The two pumps both hook up to the same size hoses with the same size nipples, but an identical length of stroke on the larger pump is pushing quite a bit more air than the small pump. There's a limit to how fast (...) (20 years ago, 17-May-04, to lugnet.technic)
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(...) That is absolutely right. Nice one David. It makes me think we could have high preformance pistons by playing with the variables at both ends. In practice, a boring out of the nipple hole diameter is like what boosted the horse power in my (...) (20 years ago, 20-May-04, to lugnet.technic)
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(...) I think Kevin has the right idea with racking up a whole bunch of pumps on the same motor. If everything pumps into one air tank anyways, you're going to be restricted to what can go through a single nipple, but there's no reason why you can't (...) (20 years ago, 20-May-04, to lugnet.technic)
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(...) One thing I noticed is that the example pump someone showed earlier has both output lines joined into one T connector, to make a single output line. If airflow is a problem, then wouldn't it be better to keep them separate, with two or more (...) (20 years ago, 21-May-04, to lugnet.technic)
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(...) I was assuming that the model would use whatever air pressure it was given, unless the state machine was shut off. Given the volume of air that it will take to make the circuit progress, an air tank won't hold enough air to help. Based on this (...) (20 years ago, 21-May-04, to lugnet.technic)
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(...) Yeah, air tanks on a compressor are really only useful when you're using short bursts of more air than the compressor can keep up with (so you need a reservoir to draw from to keep pressure up through each burst) or you're using way less than (...) (20 years ago, 21-May-04, to lugnet.technic)
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(...) Here's an important question. What will be the limiting factor in how fast this beast can move? Is it: A) Travel time for the pneumatic cylinders or B) Volume of air available? I'm under the impression it will be limited by the volume of air (...) (20 years ago, 21-May-04, to lugnet.technic)
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(...) Steve, A very interesting set of questions and logic. I don't know the answer, but can add insights that are related. As the available volume/pressure increases, the pistons expand and contract faster. I don't know if there is a linear (...) (20 years ago, 21-May-04, to lugnet.technic)
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(...) The limiting factor with the speed of the model is composed of two things: 1. The total volume of air between the valve that is switched and the cylinders that were previously supplied before the valve was switched. 2. The rate of supply of (...) (20 years ago, 22-May-04, to lugnet.technic)
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(...) Neither. It's C) The sexy lady SSClagorpion walking the other direction that catches his eye. (20 years ago, 22-May-04, to lugnet.technic)
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(...) Lessee, 5m tube vs. 5cm (or .05m) tube...I'd guess something approaching 100x as long? :) I'm guessing you meant to type something a little different there... Anyways, by my eye, the flex-system tube OD is roughly the same as the OD of the (...) (20 years ago, 22-May-04, to lugnet.technic)
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(...) This type of valve will be used to turn the power on/off (via polarity switch) for the compressor. Instead of needing an overpressure valve, the compressor will be turned off, saving batteries. I think we all agree, sometimes you really need (...) (20 years ago, 23-May-04, to lugnet.technic)
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(...) Yes, the 100x length difference will give a significant balloon effect. I suppose realistically 40cm to 5cm would be a fairer comparison. Set 8868 came with a 5m bundle of pneumatic tube. The use of flex tubing in sets began with sets 8837 (...) (20 years ago, 23-May-04, to lugnet.technic)
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(...) I have another idea for an interesting test using air tanks. Set up a pneumatic engine and add an extra piston to ONE side. (so there are three total pistons, and two move at the same time) See show the speed compairs with vs without airtanks. (...) (20 years ago, 24-May-04, to lugnet.technic)
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| | Re: SSClagorpion - The Schedule
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(...) You know what? I was looking at the numbers, and this is not going to happen before Brickfest DC '04. Maybe if we all lived in the same town, but considering shipping and extra problem solving time in the schedule, it's just not going to (...) (20 years ago, 24-May-04, to lugnet.technic)
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(...) That may be, but on Maslow's hierarchy of need, food, clothing and shelter come before LEGO. (...) When I started this little project with Eric, we had no schedule. I know it is frustracting, but thatnks for the understanding. First and (...) (20 years ago, 25-May-04, to lugnet.technic)
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(...) Boy, I thought Maslow was only used in those US Navy leadership training school that bore people to death. I remember doing an oral presentation on Maslow. -Orion (20 years ago, 25-May-04, to lugnet.technic)
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Goodness, I hate to bring up an old thread. In fact I think this one is over a year old! No matter, curiousity is burning a hole in my cranium, and that's not something you want happening! So, has this project halted and/or died, or are we just not (...) (19 years ago, 27-Jun-05, to lugnet.technic, FTX)
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(...) I am the one holding up sclagorpion.... My life has finally settled down where I can have focused LEGO time again. I have been focusing on LPub and LSynth over in CAD. I have stareted to get a few more models ready for Brickfest, none of which (...) (19 years ago, 27-Jun-05, to lugnet.technic, FTX)
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"Kevin L. Clague" <kevin_clague@yahoo.com> wrote in message news:IIr3G0.1J4H@lugnet.com... (...) Slacker... :P (19 years ago, 27-Jun-05, to lugnet.technic)
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(...) Well Rob, I took your oft repeated advice and did some building..... I recreated Robo-hominid, and prototyped a new AT-ST. THe legs on AT-ST are my best yet. I tried to eliminate having to toss the RCX side to side, but it didn't work. Time to (...) (19 years ago, 27-Jun-05, to lugnet.technic)
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(...) In the immortal words of ++lar, "That's a good start." ;) Actually, AT-ST's are one of my personal favorites. Can't wait to see your version. too bad about the RCX shifting, though... Rob (19 years ago, 27-Jun-05, to lugnet.technic)
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On Mon, June 27, 2005 11:07 am, Kevin L. Clague said: (...) Currently, I have a list of about 20 things to bring to BrickFest. None of which are SSClagorpion... But I'm glad to hear that you're bringing a (some) GBC module(s). Steve (19 years ago, 27-Jun-05, to lugnet.technic)
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(...) Your acheivements already speak volumes for you. Take your time. ;-D (19 years ago, 27-Jun-05, to lugnet.technic, FTX)
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(...) Thanks Devin. I appreciate that very much. Kevin (19 years ago, 27-Jun-05, to lugnet.technic, FTX)
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