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#41
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Let the Laughing Begin
On Thu, 07 Sep 2017 00:30:20 -0700, Jeff Liebermann
wrote: 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. Seriously, that is true in some situations. I worked with a guy that had a flourishing trucking business going in California and mush of his work was hauling fill to some large earth filled dam they were building, I think as a backup for the L.A. water supply system. In any event he sold up and came overseas to work. I asked him why and he said, "do you know how long it takes a truck driver to have a cup of coffee and a slice of pie? He explained that the last part of the haul was up a mountain so after dumping the load the truckers would roll down the hill and stop at a strategically located coffee shop. Truck #1 would drop his load and stop for coffee and about the time he was finishing the coffee truck #2 would arrive, and before they finished their coffee truck #3 would arrive and before you know it an hour and a half had gone by :-) -- Cheers, John B. |
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#42
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Let the Laughing Begin
On Thu, 07 Sep 2017 15:36:30 +0700, John B.
wrote: 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. Yep, a big effect. Mine currently doesn't have any pressure regulation, but does have an overpressure relief valve. The problem is that I want to run as much pressure as the antenna tower will handle. The maximum load is the area of the vertical tower section (something like a vertical cylinder), times the inflation pressure. The area is limited by practically and a desire to keep the weight and size reasonable. That leaves air pressure as the important parameter. If I ever decide to build an inflatable bicycle frame, the experience with the antenna tower should be useful. https://www.alibaba.com/product-detail/Yellow-giant-inflatable-bicycle-inflatable-bike_60246071497.html -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#43
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Let the Laughing Begin
On Thu, 07 Sep 2017 02:13:03 -0700, Jeff Liebermann
wrote: On Thu, 07 Sep 2017 15:36:30 +0700, John B. wrote: 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. Yep, a big effect. Mine currently doesn't have any pressure regulation, but does have an overpressure relief valve. The problem is that I want to run as much pressure as the antenna tower will handle. The maximum load is the area of the vertical tower section (something like a vertical cylinder), times the inflation pressure. The area is limited by practically and a desire to keep the weight and size reasonable. That leaves air pressure as the important parameter. Well, in a sense a constant running compressor and some sort of pressure relief valve is a pressure control system. Isn't it :-? If I ever decide to build an inflatable bicycle frame, the experience with the antenna tower should be useful. https://www.alibaba.com/product-detail/Yellow-giant-inflatable-bicycle-inflatable-bike_60246071497.html Given all the pros and cons to BB flex and stiff versus flexible frames, etc., I suggest that the "frame pressure" is probably going to be greater then you can get with your hand pump. If I remember your pressure gauge only up went to 100 psi, or there about :-) -- Cheers, John B. |
#45
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Let the Laughing Begin
On Wednesday, September 6, 2017 at 9:04:25 PM UTC-7, 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." This is the social media and most especially where it pertains to "man-made global warming". I perused the "climate change forums" yesterday and they weren't in even the wildest imagination a forum. They were ALL repetitions of falsified theories treated as if they were from intellectually gifted individuals. Most of these sites would not even allow any contradictory evidence. Turn on the TV - we now have "the worst hurricane EVER on record in the Carribean" - the "record" is only about 60 years long. But they're very careful not to say that. |
#46
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Let the Laughing Begin
On Thu, 7 Sep 2017 07:52:33 -0700 (PDT), wrote:
Jeff - tire mechanics don't use any sort of locking head. With a high capacity compressor and tank a tire fills in seconds. A few months ago, I watched the local tire dealer prepare and install a new set of tires on my Subaru: http://www.lloydstire.com As I recall, it went something like this: The mechanic would first mount one tire on the rim and place it next to each wheel next to the car. He would then connect a hose with a locking head to the tire, open a valve, and go away to do something else, as the tire fills on the ground. There was no pressure check at this point. When fully inflated, he begins to fill another tire, while the first tire is being mounted on the car. When all the tires are inflated and mounted on the car, he would go around to all 4 tires and measure the tire pressure, bleeding off any excess. It was quite efficient. I don't recall how long it took to fill an individual tire, but it didn't matter because the mechanic was busy working on one of the other tires as it filled (as facilitated by the locking head). When it stops drizzling, I might ride over there to double check my observations and fill in any details. Probably Mon or Tues. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#47
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Let the Laughing Begin
On Thu, 07 Sep 2017 09:47:15 -0700, Jeff Liebermann
wrote: On Thu, 7 Sep 2017 07:52:33 -0700 (PDT), wrote: Jeff - tire mechanics don't use any sort of locking head. With a high capacity compressor and tank a tire fills in seconds. A few months ago, I watched the local tire dealer prepare and install a new set of tires on my Subaru: http://www.lloydstire.com As I recall, it went something like this: The mechanic would first mount one tire on the rim and place it next to each wheel next to the car. He would then connect a hose with a locking head to the tire, open a valve, and go away to do something else, as the tire fills on the ground. There was no pressure check at this point. When fully inflated, he begins to fill another tire, while the first tire is being mounted on the car. When all the tires are inflated and mounted on the car, he would go around to all 4 tires and measure the tire pressure, bleeding off any excess. It was quite efficient. I don't recall how long it took to fill an individual tire, but it didn't matter because the mechanic was busy working on one of the other tires as it filled (as facilitated by the locking head). When it stops drizzling, I might ride over there to double check my observations and fill in any details. Probably Mon or Tues. Over here nearly all the Service Stations have these new automated gizmos where you dial up the required pressure and plug the hose onto the tire and stand around picking lint off your shirt until the gizmo announces that the tire is inflated. Unfortunately nearly all of them, that have been installed for any time at all, have an inoperative locking head. Apparently the locking heads, or at least the locking heads used, do not stand up well to 24 hour a day, 7 day a week usage. -- Cheers, John B. |
#48
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Let the Laughing Begin
On Thursday, September 7, 2017 at 9:47:21 AM UTC-7, Jeff Liebermann wrote:
On Thu, 7 Sep 2017 07:52:33 -0700 (PDT), wrote: Jeff - tire mechanics don't use any sort of locking head. With a high capacity compressor and tank a tire fills in seconds. A few months ago, I watched the local tire dealer prepare and install a new set of tires on my Subaru: http://www.lloydstire.com As I recall, it went something like this: The mechanic would first mount one tire on the rim and place it next to each wheel next to the car. He would then connect a hose with a locking head to the tire, open a valve, and go away to do something else, as the tire fills on the ground. There was no pressure check at this point. When fully inflated, he begins to fill another tire, while the first tire is being mounted on the car. When all the tires are inflated and mounted on the car, he would go around to all 4 tires and measure the tire pressure, bleeding off any excess. It was quite efficient. I don't recall how long it took to fill an individual tire, but it didn't matter because the mechanic was busy working on one of the other tires as it filled (as facilitated by the locking head). When it stops drizzling, I might ride over there to double check my observations and fill in any details. Probably Mon or Tues. Your mechanic is an outlier then. I have 5 tire dealers within two miles of my house. One I have 1/4 mile away that I use for all of my tire work. They remove all four tires and take them over to the mountain machine. They use the mounting machine, use the strap to pull the bead in enough and then fill the tire on the machine and then take it off. The car is on a lift. They do this to all four tires in succession and then mount them on the car and you're finished. They don't pull any hoses around and they don't need to lock a head to the valve. As I said - they have large pumps and pressure storage tanks and the tire fills in seconds. |
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