Just about everyone has used on in the form of drill bits. Perhaps they didn't realise. Thanks very much for another educational and informative video. I look forward to seeing the generator.
Excellent video. It's amazing how many ancient inventions are being implemented into modern day methods. Great and easy way to repurpose old CD's. Thanks Rob, looking forward to seeing the journey this series takes us on.
very nice solution! a simple way to refine the overlap issue but retain the benefit of having a good gluing surface, while also making the construction that much more robust, could be to double up the CDs and offset the two layers by that overlap angle. should give you the cleanest transition surface, even better than a weld or glue seam i'd imagine.
@@ThinkingandTinkering awesome, glad you like the idea, i respect your creativity and knowledge highly! lol, i don't need credit, you're the one who inspires us daily! but thanks :-) looking forward to seeing the uses you come up with. i'll have to check tomorrow; i wonder if a CD will fit into a standard rain gutter without additional trimming?
ARchimedes Screw for Light, Sir John Pendry: This mechanism is possible only over a range of velocities dictated by the amplitude of the grating. We contend that this grabbing hold of the light to raise its energy level is analogous to the function of an Archimedes screw in raising the level of water. It is worth remarking that, although the problem is mathematically more amenable in the impedance-matched case, this amplification effect is not contingent on both ε and μ being modulated. In Supplementary Figure 1 we demonstrate this, showing the case where only ε is modulated, as most easily accomplished in pump-probe experiments.
Instead of an overlap and glue, or even cutting a wedge, I am pondering a Heat Splicer for the overlap that consists of nothing more than a Hot Jaw Press to squish'em together.
There is a very nice example of an Archimedes Screw generator in a cafe in Hebden Bridge near Halifax in West Yorkshire. You can watch it working while having a cup of tea at the back of the cafe. They also have a nice example of an undershot wheel inside the cafe, working but not as a generator.
Thanks Dr Rob, nicely explained and great use of scrap. Even cheaper CD's are available from car-boot sites, just go along at the end of the day for some real, cheap deals, you might even find a film you may never have seen before.
I've made some costumes out of cut CD's. I warmed up a toaster oven, turned it off threw the CD in for about 10 seconds, and could then cut it with a scissors until it cooled too much. Try to cut a cooled CD and it cracks. Also, the aluminum layer can peel off if it is supporting too much weight or another force is applied to it. Waiting patiently to see what you're going to do with that screw. Maybe you could find a wedge of the correct angle to separate the cut as you heat the CD's?
Thank you for the idea. One remark superglue and water are not good friends, so coupling the disc screws with cyanoacrylate doesn’t seem being a good idea to me. You may correct me if I’m wrong.
And the way you're going about it makes it really lightweight compared to metal version or other material and doesn't require a lot of Machining to do it
If it had variable pitch and taper and also mounted in a funnel with matching dimensions it might work in some hydroelectric generator,suppose the Lilly impeller is already with its extra dimension
they are already using them in hydro generation mate - fixed pitch and taper - but I like the idea of variable pitch I can see where you are going with that for sure
Hi, Robert. Nice video. What happens if you throw any of those discs like a frisbee? Will it fly up or down depending on the direction of the rotation? Please, try it and post a new video showing it.
Out of curiosity, do you think you could use a small series of belts or wheels to connect a screw to a water wheel? Pump water from a stream to a higher pond?
Got me wondering how you fix the exterior periphery of that to the inside of a pipe to form a water lift. 🤔 I suppose i could run some liquid sealant or glue down the spiral but it'd be a bit hit and miss.
@@ThinkingandTinkeringthanks, tolerances wil be precise then. Guess it's a case of build from scratch wth metal. I'm thinking aluminium and those aluminium welding rods you did a, video about about, roll a tube to fit and weld that same way. For the small frog pond in the garden, feed a header pool for a slow waterfall to aerate, either using a squirrel cage wind turbine driving a motor and gear system or by gears/belt. Still on mental drawing board so far.
@@GofuKyersen it depends what you want it for mate - if you want it for a pump the easiest thing is just to wrap a bit of garden hose around a pipe - the hose makes a helix and that will act as an Archimedes screw and pump
You said that an Archimedes screw can only be used for generation if it uses a helix. I thought by definition they used helices. How would you make one that didn't use a helix?
Speaking of hot glue, my dad once worked at a shoe factory, he offer worked night watchman, and I'd go with him, they had really good hot glue guns, it was much better than anything I seen since, it was hot enough it would melt into some plastics, I guess it had to be since they were glueing leather, until it could be stitched or what ever, they made dress shoes, but when the basket ball shoes came out with the pump in them, I found a pair that they were reverse engineering, evry stitch was taken out! Very interesting, if they were my size, I'd probably tried to put them back together, ha-ha!! I was wearing a 11-12 by I was 10-11 years, off subject a bit maybe, but there was a glue gun in the video! Ha...
a good excuse - did you know bad shoes go to hell - after all shoes have soles lol - we think of hot glue being one thing but there are a ton of formulations - I learnt that when I did a bit of bookbinding years ago - it is pretty interesting stuff tbh
I absolutely LOVE your videos and ideas!! 😎👍 I just watched the one: "How to use an induction motor as a generator" And I have a question.. I am wanting to motorize a couple bicycles for my kids. I have access to a lot of salvage, and I was wondering if it would be possible to maybe mount a couple of small wind turbines (maybe even a smaller version of the one you built) on the handle bars or the back of the seat. In order to charge a battery that would in turn run the bicycle? (Please forgive me if this sounds stupid, but I don't know where to start, and I just can't afford to buy them electric bikes 😞) Thanks again for the videos 👍
@Desmond Bagley absolutely! That is a great place to start😀 and I'll just work up from there. Right on, thanks 👍 I was thinking too "bare bones" I didn't even consider using things like that. Awesome. (What do you think of maybe a weed Wacker or electric lawnmower? (Maybe an electric trolling motor) Thanks again 👍.
Desmond is spot on mate - there are just a ton of ways of doing that and that in itself makes it difficult to know what to say - I am afraid you need to make some decisions in line with Desmond's suggestions - once you have made some choices you will have a clearer start point
@@ThinkingandTinkering ok, I will give it another chance and try some more brands. Felt in love with 2k epoxy, but it smells and is not environment friendly.
Made a pump using a couple of aluminum beer cans and some alum-weld. I never thought about trying to power something with a screw but it makes sense.
I like that pump idea - you should do a vid on it
Just about everyone has used on in the form of drill bits. Perhaps they didn't realise. Thanks very much for another educational and informative video. I look forward to seeing the generator.
cheers mate
Excellent video. It's amazing how many ancient inventions are being implemented into modern day methods. Great and easy way to repurpose old CD's. Thanks Rob, looking forward to seeing the journey this series takes us on.
cheers mate - I am remaking it with polycarbonate cement as we speak - generator here we come lol
@@ThinkingandTinkering looking forward to seeing the next episode of modern twists on ancient tech
I'm here to figure out an improved water pump for a fish tank filter, but this was so well done, I've subbed!
Thank you! Great explanation and design!
very nice solution! a simple way to refine the overlap issue but retain the benefit of having a good gluing surface, while also making the construction that much more robust, could be to double up the CDs and offset the two layers by that overlap angle. should give you the cleanest transition surface, even better than a weld or glue seam i'd imagine.
that's clever thinking mate - I like that - I shall use it if that's ok - credit to you of course
@@ThinkingandTinkering awesome, glad you like the idea, i respect your creativity and knowledge highly! lol, i don't need credit, you're the one who inspires us daily! but thanks :-)
looking forward to seeing the uses you come up with.
i'll have to check tomorrow; i wonder if a CD will fit into a standard rain gutter without additional trimming?
ARchimedes Screw for Light, Sir John Pendry: This mechanism is possible only over a range of velocities dictated by the amplitude of the grating. We contend that this grabbing hold of the light to raise its energy level is analogous to the function of an Archimedes screw in raising the level of water. It is worth remarking that, although the problem is mathematically more amenable in the impedance-matched case, this amplification effect is not contingent on both ε and μ being modulated. In Supplementary Figure 1 we demonstrate this, showing the case where only ε is modulated, as most easily accomplished in pump-probe experiments.
Instead of an overlap and glue, or even cutting a wedge, I am pondering a Heat Splicer for the overlap that consists of nothing more than a Hot Jaw Press to squish'em together.
There is a very nice example of an Archimedes Screw generator in a cafe in Hebden Bridge near Halifax in West Yorkshire. You can watch it working while having a cup of tea at the back of the cafe. They also have a nice example of an undershot wheel inside the cafe, working but not as a generator.
Thanks Dr Rob, nicely explained and great use of scrap. Even cheaper CD's are available from car-boot sites, just go along at the end of the day for some real, cheap deals, you might even find a film you may never have seen before.
I love car boot sales mate
Ice cream machines! Archie's screw are in them too!
a very good use for them lol
Slurpie machines too.
I really enjoy these videos! You’re answering questions that I didn’t even know I had!
Thank you. I always wondered how these were made from flat forms.
cheers mate
Always inspirational, Thank You!
cheers mate
I've made some costumes out of cut CD's. I warmed up a toaster oven, turned it off threw the CD in for about 10 seconds, and could then cut it with a scissors until it cooled too much. Try to cut a cooled CD and it cracks. Also, the aluminum layer can peel off if it is supporting too much weight or another force is applied to it.
Waiting patiently to see what you're going to do with that screw. Maybe you could find a wedge of the correct angle to separate the cut as you heat the CD's?
A wedge is a good idea but really a little practice and this can be done adequately by eye - I plan to make a hydro generator from it
Novel idea. Trying to figure out a way to spot weld the overlap.
I think DmonZ1988 made a good suggestion mate
Excellent, looking forward to part 2 :)
cheers mate
Thank you for the idea. One remark superglue and water are not good friends, so coupling the disc screws with cyanoacrylate doesn’t seem being a good idea to me. You may correct me if I’m wrong.
it's ok to practice mate - these do take a little making - but in a final version I would use a polycarbonate glue with a polycarbonate centre
And the way you're going about it makes it really lightweight compared to metal version or other material and doesn't require a lot of Machining to do it
with the right glue this should be pretty strong
learning from you is a real joy!
thank you mate - v cool of you to say so - cheers
You're my open source hero!
you always come up with fascinating subjects to learn from
cheers. mate
If it had variable pitch and taper and also mounted in a funnel with matching dimensions it might work in some hydroelectric generator,suppose the Lilly impeller is already with its extra dimension
they are already using them in hydro generation mate - fixed pitch and taper - but I like the idea of variable pitch I can see where you are going with that for sure
Thank you for sharing this video 🙂
yay another thing I can do with all those old CD's I have left over.
beats a wind chime for sure lol
Hi, Robert. Nice video. What happens if you throw any of those discs like a frisbee? Will it fly up or down depending on the direction of the rotation? Please, try it and post a new video showing it.
Very good idea to use old cds and you did a good job as well.
cheers mate
Old DVDs of ‘The Spiral Staircase’ are recommended for this project.
Now we've got a windmill, a gearbox, and an Archimedes screw. We can now pump water with the wind.
yep - or use the screw as a hydro generator
Out of curiosity, do you think you could use a small series of belts or wheels to connect a screw to a water wheel? Pump water from a stream to a higher pond?
Great idea, thanks!
Ah ha!!! Good to see you doing a video about the Archimedes screw Rob! Hope you're all well down there.
cheers mate and keeping well - hope the same for yourself
Got me wondering how you fix the exterior periphery of that to the inside of a pipe to form a water lift. 🤔 I suppose i could run some liquid sealant or glue down the spiral but it'd be a bit hit and miss.
it's just close fit mate
@@ThinkingandTinkeringthanks, tolerances wil be precise then. Guess it's a case of build from scratch wth metal. I'm thinking aluminium and those aluminium welding rods you did a, video about about, roll a tube to fit and weld that same way. For the small frog pond in the garden, feed a header pool for a slow waterfall to aerate, either using a squirrel cage wind turbine driving a motor and gear system or by gears/belt. Still on mental drawing board so far.
@@GofuKyersen it depends what you want it for mate - if you want it for a pump the easiest thing is just to wrap a bit of garden hose around a pipe - the hose makes a helix and that will act as an Archimedes screw and pump
Saw your latest video Robert. Half pipe. Makes perfect sense, just sit it in a gutter.
is it possible to spin a screw by pushing a magnet through the central pipe?
making the inner thread magnetic first ofc.
dunno mate - worth a try let me know how you get on
You said that an Archimedes screw can only be used for generation if it uses a helix. I thought by definition they used helices. How would you make one that didn't use a helix?
oh yeah lol - I meant a pipe helix - my bad
Speaking of hot glue, my dad once worked at a shoe factory, he offer worked night watchman, and I'd go with him, they had really good hot glue guns, it was much better than anything I seen since, it was hot enough it would melt into some plastics, I guess it had to be since they were glueing leather, until it could be stitched or what ever, they made dress shoes, but when the basket ball shoes came out with the pump in them, I found a pair that they were reverse engineering, evry stitch was taken out! Very interesting, if they were my size, I'd probably tried to put them back together, ha-ha!! I was wearing a 11-12 by I was 10-11 years, off subject a bit maybe, but there was a glue gun in the video! Ha...
a good excuse - did you know bad shoes go to hell - after all shoes have soles lol - we think of hot glue being one thing but there are a ton of formulations - I learnt that when I did a bit of bookbinding years ago - it is pretty interesting stuff tbh
Every time I see Rob's hands covered in graphene, I wonder what he was up to just before the video....Lol
in time mate you will find out - there are just some things I can't speak about right now
@drop stix I am sure I will mate - cheers
now I can make my own water pumps and sell it to my fellow villagers!
Thanks.
I absolutely LOVE your videos and ideas!! 😎👍
I just watched the one:
"How to use an induction motor as a generator"
And I have a question..
I am wanting to motorize a couple bicycles for my kids.
I have access to a lot of salvage, and I was wondering if it would be possible to maybe mount a couple of small wind turbines (maybe even a smaller version of the one you built) on the handle bars or the back of the seat. In order to charge a battery that would in turn run the bicycle?
(Please forgive me if this sounds stupid, but I don't know where to start, and I just can't afford to buy them electric bikes 😞)
Thanks again for the videos 👍
@Desmond Bagley absolutely! That is a great place to start😀 and I'll just work up from there.
Right on, thanks 👍
I was thinking too "bare bones" I didn't even consider using things like that. Awesome.
(What do you think of maybe a weed Wacker or electric lawnmower?
(Maybe an electric trolling motor)
Thanks again 👍.
Desmond is spot on mate - there are just a ton of ways of doing that and that in itself makes it difficult to know what to say - I am afraid you need to make some decisions in line with Desmond's suggestions - once you have made some choices you will have a clearer start point
@@ThinkingandTinkering right on!😀 Thanks guys 👍
Eureka!
lol
I hate hot glue, always seems to hold until it doesn't 😃😂
there's lots of different kinds mate - some is awesome - some - well not so much lol
@@ThinkingandTinkering ok, I will give it another chance and try some more brands. Felt in love with 2k epoxy, but it smells and is not environment friendly.
If only this idea had come out in the day of the constant barrage of AOL cd’s...
lol - I remember that - how true lol
I know how to make an archimedes screw in a much simpler way than the method you describe.
who says Archimedes was right handed?
These people always talk you to sleep telling you what NOT to do..shorten it up and tell us what TO do!
Bla bla bla five minutes.