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#31
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Let the Laughing Begin
On Wed, 6 Sep 2017 15:07:43 -0400, Duane
wrote: Or just buy a decent pump and forget about it. I Googled for "decent pump" and didn't find anything that meets all my requirements. Also, I won't forget this. I smell a profit here. Perhaps I should also weaponize my bicycle pump? "High pressure, multiple-stage air pump with valve body inlet port arrangement" https://www.google.com/patents/US8047818 "One application where high pressure air is required is with high performance air rifles. Such rifles rival performance of light caliber firearms, and may yield muzzle velocities approaching 1200 fps. In order to achieve such velocities, an air reserve tank is coupled to the rifle that provides air pressure in the 2000 psi to 3600 psi range." If some vehicle gets within 3ft of me, I just pull out my weaponized universal bicycle pump, and blow a hole in their 20 gauge sheet metal armor. That would seem far more effective and satisfying than kicking their door as they pass. Yeah, I want one. Ummm.... what caliber would you consider to be "decent"? -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
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#32
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Let the Laughing Begin
On Wednesday, September 6, 2017 at 3:08:09 PM UTC-7, wrote:
On Wednesday, September 6, 2017 at 12:07:47 PM UTC-7, Duane wrote: Or just buy a decent pump and forget about it. As Jeff asked - what is a "decent pump"? A pump that works good on a high pressure racing bike takes forever to inflate an MTB tire. With almost all of the pumps these days using that awful filler valve https://tinyurl.com/y84dcpqn simply isn't right for other applications. I thot we already established that when you put down the $$ for a floor pump that has a good reputation, and is not toward the lower end of the range, still you get a gauge that is 7psi off. IOW there are no decent pumps on the market; they all cheese out on the gauge. |
#34
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Let the Laughing Begin
On Thu, 07 Sep 2017 07:23:07 +0700, John B.
wrote: Sigh. Inflate the desired tire at what temperature, with how much effort, how quickly, to what accuracy, how big a tire, etc? (...) You missed the "desired tire to the desired pressure" ;-? No I didn't. The word "Inflate" assumes that pressure is checked (unless you subscribe to my hard, firm, soft, mush, flat empirical standard for tire inflation without numbers. Here's one application for an air pump with which I'm currently working: https://www.amazon.com/Carburetor-detector-Replaces-Tillotson-243-504/dp/B06Y542R9S Yes, it's an air pump. It's used to apply pressure to the carburetor fuel inlet on a 2 stroke engine (chain saw) to determine if the needle valve is working properly and not leaking. Apply pressure and it should open the needle valve at about 15 psi. Let it bleed down, and it should close again at 5 psi. Pressurized to 10 psi and dunk the carburetor into a bowl of water while looking for leaks (air bubbles). A "good pump" should be able to do this as well. Yup, we used to do that. Blow into the fuel line. While nobody's cheeks were calibrated in psi it did tell you if the needle valve was leaking. One did have to spit a bit to get the gasoline taste out of your mouth though. :-) Ummm... perhaps you shouldn't inhale with the hose in your mouth? I built a fairly simple contrivance to avoid having to pay $40 for a cheap Chinese clone of the real pressure tester. For a pressure pump, I used a plastic baking syringe: https://www.google.com/search?q=plastic+baking+syringe&tbm=isch The rubber seal was the first to fall apart followed by the crumbling of the clear plastic. I used vinyl hose instead of Trygon fuel line, which seems to be softening from ethynol exposure. Maybe I should just give up and spend the $40. (Note to self: Universal air pump design should have a Tygon hose option). -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#35
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Let the Laughing Begin
On Wed, 06 Sep 2017 13:26:51 +0700, John B.
wrote: As someone wrote, "Reality is anything you want it to be. Yep. Reality is in the mind of the beholder. Which is the real me? http://www.learnbydestroying.com/jeffl/pics/jeffl/jeffl-wolf.gif Just close your eyes and let your imagination run wild." Not while I'm riding or typing. Besides, the statement is backwards. I close my eyes BECAUSE my imagination has gone wildly out of control. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#36
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Let the Laughing Begin
On Wed, 6 Sep 2017 19:06:34 -0700 (PDT), Doug Landau
wrote: As someone wrote, "Reality is anything you want it to be. Just close your eyes and let your imagination run wild." -- Cheers, John B. LOL Pat Tillman! :-) But even a casual reading of the "social networks" seems to prove my point :-) Actually I was reacting to what I wanted to react to not exactly what you said. What trips me out is when people say you make your own reality. Certainly it is a lovely thought and a lovely thing to say to someone seeking inspiration, and certainly the Olympic gold medalist subscribes to the theory. But where does that leave the silver medalist? Who believed and believed and believed and busted and busted and busted their ass? Derek Porter was my first rowing hero. He was in an 8 that got a gold in 92, and was world champ in 93, IIRC, and thot 96 was his year. Look at him try to hold back the tears on the podium in 96* and again in 00. https://www.youtube.com/watch?v=wViOIIh7pUU https://www.google.com/search?q=Dere... cw4dTFyxb5M: *It is well worth watching the whole race, for other reasons. Cheers And I was thinking of the Facebook account that "went viral" recently here about the newly constructed, not yet finished "high-rise" that was going to fall over. See http://tinyurl.com/y83kdemv I remember reading somewhere that: "The potential collective intelligence of a human group is exponentially proportional to group size, however in practice the actual collective intelligence that is achieved by a group is inversely proportional to group size. There is a huge delta between potential collective intelligence and actual collective intelligence in practice. In other words, when it comes to collective intelligence, the whole has the potential to be smarter than the sum of its parts, but in practice it is usually dumber." to quote http://tinyurl.com/yd68nx2 -- Cheers, John B. |
#37
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Let the Laughing Begin
On Wed, 06 Sep 2017 20:39:07 -0700, Jeff Liebermann
wrote: On Thu, 07 Sep 2017 07:23:07 +0700, John B. wrote: Sigh. Inflate the desired tire at what temperature, with how much effort, how quickly, to what accuracy, how big a tire, etc? (...) You missed the "desired tire to the desired pressure" ;-? No I didn't. The word "Inflate" assumes that pressure is checked (unless you subscribe to my hard, firm, soft, mush, flat empirical standard for tire inflation without numbers. Ever do much with inflatable mattresses, used by some campers? Or those little inflatable raft thing that kids use in the back yard pool? Or Inflatable boats. No pressure gauges for those.... and having used an inflatable boat for a year or so I can assure you that when you are putt-putting a mile out into the bay to get to your yacht you do have a certain amount of interest in the boat being inflated to "the desired pressure" :-) Here's one application for an air pump with which I'm currently working: https://www.amazon.com/Carburetor-detector-Replaces-Tillotson-243-504/dp/B06Y542R9S Yes, it's an air pump. It's used to apply pressure to the carburetor fuel inlet on a 2 stroke engine (chain saw) to determine if the needle valve is working properly and not leaking. Apply pressure and it should open the needle valve at about 15 psi. Let it bleed down, and it should close again at 5 psi. Pressurized to 10 psi and dunk the carburetor into a bowl of water while looking for leaks (air bubbles). A "good pump" should be able to do this as well. Yup, we used to do that. Blow into the fuel line. While nobody's cheeks were calibrated in psi it did tell you if the needle valve was leaking. One did have to spit a bit to get the gasoline taste out of your mouth though. :-) Ummm... perhaps you shouldn't inhale with the hose in your mouth? Well, most people were bright enough not to do that, some without being told, too. I built a fairly simple contrivance to avoid having to pay $40 for a cheap Chinese clone of the real pressure tester. For a pressure pump, I used a plastic baking syringe: https://www.google.com/search?q=plastic+baking+syringe&tbm=isch The rubber seal was the first to fall apart followed by the crumbling of the clear plastic. I used vinyl hose instead of Trygon fuel line, which seems to be softening from ethynol exposure. Maybe I should just give up and spend the $40. (Note to self: Universal air pump design should have a Tygon hose option). -- Cheers, John B. |
#38
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Let the Laughing Begin
On Thu, 07 Sep 2017 13:22:05 +0700, John B.
wrote: On Wed, 06 Sep 2017 20:39:07 -0700, Jeff Liebermann wrote: On Thu, 07 Sep 2017 07:23:07 +0700, John B. wrote: Sigh. Inflate the desired tire at what temperature, with how much effort, how quickly, to what accuracy, how big a tire, etc? (...) You missed the "desired tire to the desired pressure" ;-? No I didn't. The word "Inflate" assumes that pressure is checked (unless you subscribe to my hard, firm, soft, mush, flat empirical standard for tire inflation without numbers. Ever do much with inflatable mattresses, used by some campers? Or those little inflatable raft thing that kids use in the back yard pool? Or Inflatable boats. No pressure gauges for those.... and having used an inflatable boat for a year or so I can assure you that when you are putt-putting a mile out into the bay to get to your yacht you do have a certain amount of interest in the boat being inflated to "the desired pressure" :-) Sure. When one inflates a vessel with a large volume and semi-rigid structure, there's quite a large difference in air volume between maximum and minimum inflation. Plenty of room to experiment and fairly easy to determine if it's hard, firm, soft, mush, or flat. However, as the vessel volume becomes smaller and the structure become more rigid, that allowable sloppiness becomes small. A small blast of air from the inflator, could mean over-inflation. Blowing some air out the Presta valve to clear out the dirt, might drop the tire to well below operational pressure. Incidentally, I've been working erratically on the design of several inflatable portable antenna structures. Something like these but smaller and lighter: http://www.ltaprojects.com Inflation pressure largely determines the load capacity of the structure. Underinflation can cause buckling. Therefore, it's important to set the pressure accurately. Much of the basic design closely resembles an inflatable air mattress sitting on end. Ummm... perhaps you shouldn't inhale with the hose in your mouth? Well, most people were bright enough not to do that, some without being told, too. I just demonstrated that I'm not one of the bright ones. I've been having problems seeing the computer screen. The characters all seem to look blurry. Various reading glasses didn't help much. I just wasted an hour poking around the monitor trying to determine the cause. After essentially giving up, I decided that maybe I should give the "Auto" button on the monitor a try. That fixed the problem in a few seconds. Moral: When looking for the obscure, be sure to also check the obvious. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#39
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Let the Laughing Begin
On Thu, 07 Sep 2017 11:04:20 +0700, John B.
wrote: "The potential collective intelligence of a human group is exponentially proportional to group size, however in practice the actual collective intelligence that is achieved by a group is inversely proportional to group size. There is a huge delta between potential collective intelligence and actual collective intelligence in practice. In other words, when it comes to collective intelligence, the whole has the potential to be smarter than the sum of its parts, but in practice it is usually dumber." to quote http://tinyurl.com/yd68nx2 Collective intelligence is also linear. If one person can do a specific job in 1 hr, two people will take 2 hrs, three people will take 3 hrs, four people will take 4 hrs, etc. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#40
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Let the Laughing Begin
On Thu, 07 Sep 2017 00:21:24 -0700, Jeff Liebermann
wrote: On Thu, 07 Sep 2017 13:22:05 +0700, John B. wrote: On Wed, 06 Sep 2017 20:39:07 -0700, Jeff Liebermann wrote: On Thu, 07 Sep 2017 07:23:07 +0700, John B. wrote: Sigh. Inflate the desired tire at what temperature, with how much effort, how quickly, to what accuracy, how big a tire, etc? (...) You missed the "desired tire to the desired pressure" ;-? No I didn't. The word "Inflate" assumes that pressure is checked (unless you subscribe to my hard, firm, soft, mush, flat empirical standard for tire inflation without numbers. Ever do much with inflatable mattresses, used by some campers? Or those little inflatable raft thing that kids use in the back yard pool? Or Inflatable boats. No pressure gauges for those.... and having used an inflatable boat for a year or so I can assure you that when you are putt-putting a mile out into the bay to get to your yacht you do have a certain amount of interest in the boat being inflated to "the desired pressure" :-) Sure. When one inflates a vessel with a large volume and semi-rigid structure, there's quite a large difference in air volume between maximum and minimum inflation. Plenty of room to experiment and fairly easy to determine if it's hard, firm, soft, mush, or flat. However, as the vessel volume becomes smaller and the structure become more rigid, that allowable sloppiness becomes small. A small blast of air from the inflator, could mean over-inflation. Blowing some air out the Presta valve to clear out the dirt, might drop the tire to well below operational pressure. Incidentally, I've been working erratically on the design of several inflatable portable antenna structures. Something like these but smaller and lighter: http://www.ltaprojects.com Inflation pressure largely determines the load capacity of the structure. Underinflation can cause buckling. Therefore, it's important to set the pressure accurately. Much of the basic design closely resembles an inflatable air mattress sitting on end. I would think that temperature would have a rather large effect on this sort of thing but I suspect that an automatic air pressure system wouldn't be difficult to arrange. Ummm... perhaps you shouldn't inhale with the hose in your mouth? Well, most people were bright enough not to do that, some without being told, too. I just demonstrated that I'm not one of the bright ones. I've been having problems seeing the computer screen. The characters all seem to look blurry. Various reading glasses didn't help much. I just wasted an hour poking around the monitor trying to determine the cause. After essentially giving up, I decided that maybe I should give the "Auto" button on the monitor a try. That fixed the problem in a few seconds. Moral: When looking for the obscure, be sure to also check the obvious. -- Cheers, John B. |
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