jamesp
Cave Dweller 
Member since October 2012
Posts: 36,602
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Post by jamesp on Aug 20, 2017 12:54:59 GMT -5
Yes that 1dave. Trying to figure out how they get 13,000 RPM out of it by simply rocking it in their hand. I ordered one off Ebay for $12. Got figure that one out. They have bigger gyro exercise devices too. I should PM you when I get it. Tell you about it. When I was a kid the neighbor had a toy gyro about 12 inches diameter. Well made. Must have had a 8 pound steel disc in it. Hand cranked(detachable crank) with super high up geared gear box. You had to be careful with it. Best loosen your grip or it would slowly twist your shoulder out of joint. RPM sounded jet engine. Other gyros being made with little notches on the rotor so you can use a compressed air nozzle to spin them to ridiculous RPM. You probably know that trick. The amount of energy that can be stored in a small 50,000 RPM flywheel is one of the most efficient(not necessarily practical) energy storage methods. |
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Post by pauls on Aug 20, 2017 16:09:50 GMT -5
Thanks for the writeup Scott.
I have been toying with the idea of building a machine for a while, finally collected 3 planetary gearboxes from Hitachi washing machines, that and the motors from the same machines should give me a decent start.
Now just need to get a dozen other projects out of the way first.
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Post by 1dave on Aug 20, 2017 16:38:03 GMT -5
Thanks for the writeup Scott. I have been toying with the idea of building a machine for a while, finally collected 3 planetary gearboxes from Hitachi washing machines, that and the motors from the same machines should give me a decent start. Now just need to get a dozen other projects out of the way first. That is my problem too, but now it takes a week to do what I used to do in an hour. |
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Post by captbob on Aug 20, 2017 17:08:52 GMT -5
That is my problem too, but now it takes a week to do what I used to do in an hour. Slightly different here. I think about ALL the aspects and permutations for a week then spend an hour actually doing it. Always like to -  |
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Post by Rockoonz on Aug 20, 2017 22:35:42 GMT -5
Yeah captbob for me spur of the moment is when I only plan for a week ahead. |
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Post by Rockoonz on Aug 21, 2017 0:23:45 GMT -5
Yes that 1dave. Trying to figure out how they get 13,000 RPM out of it by simply rocking it in their hand. I ordered one off Ebay for $12. Got figure that one out. They have bigger gyro exercise devices too. I should PM you when I get it. Tell you about it. When I was a kid the neighbor had a toy gyro about 12 inches diameter. Well made. Must have had a 8 pound steel disc in it. Hand cranked(detachable crank) with super high up geared gear box. You had to be careful with it. Best loosen your grip or it would slowly twist your shoulder out of joint. RPM sounded jet engine. Other gyros being made with little notches on the rotor so you can use a compressed air nozzle to spin them to ridiculous RPM. You probably know that trick. The amount of energy that can be stored in a small 50,000 RPM flywheel is one of the most efficient(not necessarily practical) energy storage methods. Really like the idea of kinetic energy storage. Let Afghanistan keep their Lithium. www.scientificamerican.com/article/new-flywheel-design/ |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,602
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Post by jamesp on Aug 21, 2017 6:30:39 GMT -5
Yes that 1dave. Trying to figure out how they get 13,000 RPM out of it by simply rocking it in their hand. I ordered one off Ebay for $12. Got figure that one out. They have bigger gyro exercise devices too. I should PM you when I get it. Tell you about it. When I was a kid the neighbor had a toy gyro about 12 inches diameter. Well made. Must have had a 8 pound steel disc in it. Hand cranked(detachable crank) with super high up geared gear box. You had to be careful with it. Best loosen your grip or it would slowly twist your shoulder out of joint. RPM sounded jet engine. Other gyros being made with little notches on the rotor so you can use a compressed air nozzle to spin them to ridiculous RPM. You probably know that trick. The amount of energy that can be stored in a small 50,000 RPM flywheel is one of the most efficient(not necessarily practical) energy storage methods. Really like the idea of kinetic energy storage. Let Afghanistan keep their Lithium. www.scientificamerican.com/article/new-flywheel-design/Back in engineering school we had a class on energy. 1980 High speed low to medium mass flywheel was the star of the show. The challenge was to simply make a mechanical system that would reliably allow super high RPM's. Low power input to spin it up. Huge stored potential. Simple and pollution free. Tap horsepower off it in impulses and spin it back up. Solar powered high speed DC motors could spin them up effortlessly. Not near as passive. But if well contained and sound dampened you had a real power pack. Has a huge potential in auto industry where noise can be controlled/allowed. We will run out of lithium if they attempt mass electric car usage. Energy of fossil fuel reserves dwarfs lithium potential. Lest they discover huge lithium reserves. Alternate energy idiots do not consider reserves. Wake up folks. |
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Post by Rockoonz on Aug 21, 2017 10:40:49 GMT -5
jamesp when I was 7 and my folks moved us to the NW they bought a house with a large garage/shop with a large room above it. In that room was a library of popular science and popular mechanics magazines going back to the mid 40's. A lot of the ideas I remember reading in those mags have been the cutting edge technology of recent years. Most of the 20 and 30 something "engineers" I have sat in meetings with in recent years are clearly people who probably can't change the oil in their own cars, how do they graduate with degrees? A previous co-worker had a lithium button cell spare for his e-cig self ignite in his pocket. People consider highly explosive hydrogen to be a viable fuel, ignoring the dangers and poor efficiency. Municipalities criminalize urban off grid living. Wasn't this a sphere machine thread?
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Post by 1dave on Aug 21, 2017 10:46:44 GMT -5
You may wonder why we wander but @shotgunner will be back from viewing the eclipse to right (write?) all wrongs.
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Post by captbob on Aug 21, 2017 11:06:03 GMT -5
Wasn't this a sphere machine thread? Nothing is sacred, or safe, or whatever you want to call it. |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,602
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Post by jamesp on Aug 21, 2017 14:18:53 GMT -5
Wasn't this a sphere machine thread? Nothing is sacred, or safe, or whatever you want to call it. On subject ? |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,602
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Post by jamesp on Aug 21, 2017 14:42:38 GMT -5
jamesp when I was 7 and my folks moved us to the NW they bought a house with a large garage/shop with a large room above it. In that room was a library of popular science and popular mechanics magazines going back to the mid 40's. A lot of the ideas I remember reading in those mags have been the cutting edge technology of recent years. Most of the 20 and 30 something "engineers" I have sat in meetings with in recent years are clearly people who probably can't change the oil in their own cars, how do they graduate with degrees? A previous co-worker had a lithium button cell spare for his e-cig self ignite in his pocket. People consider highly explosive hydrogen to be a viable fuel, ignoring the dangers and poor efficiency. Municipalities criminalize urban off grid living. Wasn't this a sphere machine thread? Early manufacturing was a hiatus of mechanical technology in many ways. Complicated mathematical applications for instance. On subject, the sphere machine came about quite a long time ago. Along with vibratory tumbler technology. Those are technically complicated devices. Probably the birth child of some of the old school engineers that knew how to apply math well. But also knew how to use a wrench. I assume the Vibrasonic tumbler was carefully designed. It is no trail and error design, and vibration theory applied. Not simple. Not sure what to think of the new generation. Some of their feats are amazing. The hands on aspect must have fallen by the wayside. Most mechanical technology has been around for a long time. |
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Post by Rockoonz on Aug 21, 2017 14:43:04 GMT -5
Wasn't this a sphere machine thread? Nothing is sacred, or safe, or whatever you want to call it. Sacrosanct? |
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Post by 1dave on Aug 21, 2017 14:49:28 GMT -5
Off Topic - "Thinking outside of the box" and sometimes sanity.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,602
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Post by jamesp on Aug 21, 2017 14:50:56 GMT -5
You may wonder why we wander but @shotgunner will be back from viewing the eclipse to right (write?) all wrongs. No telling where that one is or what he is doing. |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,602
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Post by jamesp on Aug 21, 2017 14:52:06 GMT -5
Off Topic - "Thinking outside of the box" and sometimes sanity. Obviously outside of the thread lol. |
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Aug 23, 2017 9:28:58 GMT -5
I once saw a video of a four head machine that was used to produce the truest sphere ever made. Less variation in diameter than the most precise calipers could measure. That means spherical to less than half a ten thousandth of an inch. Nope, there are 2 silicon spheres in existence that, to the degree that we are capable of measuring, are perfect spheres. They were both made on single head machines. Check at 8 minutes in. Looks like that machine is both a single and a double headed machine. Thanks for the link! |
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Post by Rockoonz on Aug 23, 2017 16:50:57 GMT -5
Looked like the upper head acted more like a device to help keep the diameter uniform.
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Post by 1dave on Aug 23, 2017 18:40:21 GMT -5
Two is not one.
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Post by Rockoonz on Aug 23, 2017 23:17:58 GMT -5
One powered head and a hand held cup on a unique support are not two.
My goofy homemade sphere machine is a 2 head machine
The difference is obvious.
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