hi rob got a teeny prob with the new shiney shop... i cant download.. thought I'd try it out and went for the dancing diplodorcus, clicked on the model in the shop ,it took me to its own page and from there i can usually download ... the only download on the page was at the bottom of the page cam/dinosaur /download so i clicked that download and was whisked to paper pop... oops. if Im doing it all wrong let me know and am in no hurry for dancing dippies,just trying it out with that one. hope its something easy to sort ... trish .
Thanks for all the links! There is some fascinating reading in that lot. I'll have a think about this and come back to it. In the end I think Williams advice is right.
Dear Rob, I love the idea of your new project and although I would like to help you I limit just to point some links with pictures and informations. I hope this could help you. Good luck!
Oh wow! Science is a wonderous thing! I'd missed out on the double blade thing on my original model, now working on a two bladed screw with 45 degree pitch.
I originally produced models with the instructions included as part of the download. I moved the instructions onto the blog page as I thought that casual viewers would be interested to see how the models are made.
Rather than duplicating my efforts producing the same set of instructions in two formats I've provided a 'print' button at the top of the post which formats each page suitably ready for output to your printer. I hope this helps :-)
I don't really understand all the math, but it seems that the optimal values are a fairly complex function a relationship among the following factors: the pitch of the screw, the number of blades, the pitch of blades, and the inner and outer diameters of the cylinder.
Also, although I can't be sure, it seems that an optimal pitch for the screw would tend to be closer to 30deg.
Of course, none of this has very much to do with Rob's awesomeness for dredging up and posting his model, but it's fun, nevertheless.
So excited! Rob, is there a way you could include your marvelous step by step photo/instructions as a pdf for these model downloads as well. Or alternatively, perhaps give us a way to print them from the site. (Whenever I print from the website, I only get the page that's showing vs. the entire post.)
Unless I am badly mistaken the optimum angle for pumping the maximum amount of fluid (salt) is at 45 degrees with the horizontal. Low angles pump little and angles greater than 45 spill across the center shaft to be recycled and wasting driving power that turns the screw.
With regard to the screw itself I am of the opinion that the pitch will be optimum at 45 degrees.
Welcome to this forum. I just know an automaton of a musical conductor, but I'm not sure you can get it because it isn't available for a long time. It's the Keith Newstead model, called "the conductor". See the link of the model: http://www.walterruffler.de/Galerie/Newstead/orchest2.html Note: if you find anything about this model, please, share with us. Good luck!
Not such a silly question. The archives are basically anything posted in the past. I'm in the process of moving the blog/shop together at which point all should become clear. Check here for progress www.robives.com/blogshop but at the moment you'll need to link to the individual project pages from there to get to the free download links.
Your web page says "You can download all the projects posted after Dec 16, 2007 for free!
Remember, the longer you are a member, the further back you can go into the archives!"
Silly question, where are the archives? I don't see a button anywhere to get to them.
just made wag.... and its working really well I can't tell you how impressedI am with the power of pendulum... and i thought they just grew inside grandfather clocks... i love this little dog. i too am looking forward to the dragonfly... in the meantime I'll just tap wag one more time.
Congratulations for this new toy, the wag dog. It gathers two ingredients for success: simplicity and movement...It reminds me the maximum rule of Einstein: "do the things simplest you can but don't limit yourself doing just simple things". It's superb your model, Rob. I wonder new models and it makes me imagine a lot of things, like those tortoises (or dogs) that wave the heads...I just can't wait the release of next model: the dragonfly!
hi rob got a teeny prob with the new shiney shop... i cant download.. thought I'd try it out and went for the dancing diplodorcus, clicked on the model in the shop ,it took me to its own page and from there i can usually download ... the only download on the page was at the bottom of the page cam/dinosaur /download so i clicked that download and was whisked to paper pop... oops. if Im doing it all wrong let me know and am in no hurry for dancing dippies,just trying it out with that one. hope its something easy to sort ... trish .
I'm sooooo eager to build this! :)
Thanks Hugo! Won't be long now :-)
Wow, Rob! It sounds great and it seems it's gonna be fun! Go ahead! I Badly can't wait the final masterpiece!
@najmanjay: The angle of the blade on the screw.
Very cute -- assembly went without hitch. My son wanted to know why you had to tap the box, then did and was enlightened.
Andy certainly would like to be immortalized by Rob Ives...Match point!
when you say 45deg, do you mean angle of the blades on the screw, or angle of the screw mechanism, as hypotenuse?
Thanks for all the links! There is some fascinating reading in that lot. I'll have a think about this and come back to it. In the end I think Williams advice is right.
Do nothing simply if a way can be found to make it complex and wonderful.
IOW stick to the simple design for a paper model. The game isn't worth the chase.
Dear Rob, I love the idea of your new project and although I would like to help you I limit just to point some links with pictures and informations. I hope this could help you. Good luck!
http://www.dorlingkindersley-uk.co.uk/nf/ClipArt/Image/0,,_1583231,00.html
http://en.wikipedia.org/wiki/File:Archimedes-screw_one-screw-threads_with-ball_3D-view_animated.gif
http://www.arthursclipart.org/engineer/engineer/archimedes%20screw.gif
http://media.tiscali.co.uk/images/feeds/hutchinson/ency/c00125.jpg
http://cache.lexico.com/dictionary/graphics/ahd4/jpg/A4arcsM1.jpg
http://www.cs.drexel.edu/~crorres/Archimedes/Screw/SourcesScrew.html
http://www.irrigationmuseum.org/photos/Archimedes-screw.jpg
http://etc.usf.edu/clipart/36300/36377/screw_archim_36377.htm
http://eandt.theiet.org/magazine/2010/14/archimedes-screw.cfm
http://sporschool.blogspot.com/2010/04/making-archimedes-screw.html
http://www.redstoneprojects.com/trebuchetstore/archimedesscrew.html
http://www.schools.indiawaterportal.org/sites/schools.indiawaterportal.org/files/archemidis%20screw_0.jpg
Oh wow! Science is a wonderous thing! I'd missed out on the double blade thing on my original model, now working on a two bladed screw with 45 degree pitch.
mmmmmmmmmm think I need to stay in the library longer..
OH! Thanks for letting me know. I didn't see that before. It's a great model, Rob! Bravo! Standing Ovation.
I originally produced models with the instructions included as part of the download. I moved the instructions onto the blog page as I thought that casual viewers would be interested to see how the models are made.
I happen to have come across an article that just happens to address this issue of optimal pitch.
http://www.scribd.com/doc/17955689/Screw-Optimal-Design
I don't really understand all the math, but it seems that the optimal values are a fairly complex function a relationship among the following factors: the pitch of the screw, the number of blades, the pitch of blades, and the inner and outer diameters of the cylinder.
Also, although I can't be sure, it seems that an optimal pitch for the screw would tend to be closer to 30deg.
Of course, none of this has very much to do with Rob's awesomeness for dredging up and posting his model, but it's fun, nevertheless.
So excited! Rob, is there a way you could include your marvelous step by step photo/instructions as a pdf for these model downloads as well. Or alternatively, perhaps give us a way to print them from the site. (Whenever I print from the website, I only get the page that's showing vs. the entire post.)
Unless I am badly mistaken the optimum angle for pumping the maximum amount of fluid (salt) is at 45 degrees with the horizontal. Low angles pump little and angles greater than 45 spill across the center shaft to be recycled and wasting driving power that turns the screw.
With regard to the screw itself I am of the opinion that the pitch will be optimum at 45 degrees.
Dear Wreitz,
Welcome to this forum. I just know an automaton of a musical conductor, but I'm not sure you can get it because it isn't available for a long time. It's the Keith Newstead model, called "the conductor". See the link of the model: http://www.walterruffler.de/Galerie/Newstead/orchest2.html Note: if you find anything about this model, please, share with us. Good luck!
Not such a silly question. The archives are basically anything posted in the past. I'm in the process of moving the blog/shop together at which point all should become clear. Check here for progress www.robives.com/blogshop but at the moment you'll need to link to the individual project pages from there to get to the free download links.
Hi Rob,
Your web page says "You can download all the projects posted after Dec 16, 2007 for free!
Remember, the longer you are a member, the further back you can go into the archives!"
Silly question, where are the archives? I don't see a button anywhere to get to them.
That was quick Trish! Thanks both for your comments. I'm going to work on the dragonfly today.
just made wag.... and its working really well I can't tell you how impressed I am with the power of pendulum... and i thought they just grew inside grandfather clocks... i love this little dog. i too am looking forward to the dragonfly... in the meantime I'll just tap wag one more time.
Dear Rob,
Congratulations for this new toy, the wag dog. It gathers two ingredients for success: simplicity and movement...It reminds me the maximum rule of Einstein: "do the things simplest you can but don't limit yourself doing just simple things". It's superb your model, Rob. I wonder new models and it makes me imagine a lot of things, like those tortoises (or dogs) that wave the heads...I just can't wait the release of next model: the dragonfly!
It seems so cute! (: