Replication Station → S.H.O. Drive Mark I
S.H.O. Drive Mark I will be the world's first S.H.O. drive (unless proven otherwise of course) ;).
- 1 Comment Record
- 2 Presentation Outline (for S.H.O. Drive Alpha)
- 3 Build Gallery
- 4 Dimensions
- 5 April 2016 Presentation
- 6 Site map
S.H.O. Drive Mark Alpha refers to the original plan for world's first S.H.O. Drive (April 18, 2016). The actual build will incorporate clear acrylic tubes to elevate the wooden panels inside the crate for maximum transparency and minimization of the ways to hide batteries. A build and demonstration was planned for the 4th of July, but I decided that more planning was need in terms of the logistics of the demonstration as well as the final shape of the S.H.O. Coils. The build time to make the S.H.O. Drive is, and I estimate, to be around 5 hours. Since the video showing the build must be done in one take, I have to make sure that I have my ideas lined up, so this way they come out smoothly in the presentation.
Also, cost information is not listed for S.H.O. Drive Alpha because it is preliminary work, but when the world's first S.H.O. drive is built, the cost information for that build will be made available. Sincerely, S.H.O. talk 20:06, 4 July 2016 (PDT)
Wood of any kind has been completely eliminated from the planned S.H.O. Drive build. The acrylic rods have been cut (August 14, 2016), and the coils and magnets have been assembled (August 26, 2016). However, the magnets were not built according to the new plan due to assembly mishaps. So the bending of the rectangular copper windings need to be rethought, but definitely into a different S-shape. The "S-arms" will have about the same length but over fewer degrees of arc due to a larger radius. The "S-arms" will likely have "hands" bent away, radially, from the shaft to reduce drag. Also newly accounted for is the increase of the phase angle between the voltage and current as rpm increases, and so the "S-arms" will be planned to have around 90 to 135 degrees of arc. S.H.O. talk 11:48, 28 August 2016 (PDT)
Initial Test Results
The magnets were not assembled according to the most recent planned design at (https://www.youtube.com/watch?v=huy53KdwAE4) due to difficulties encountered during the assembly procedure. The magnets that were purchased "insisted" that they form a rod-shaped magnet. As a result, it resembled an earlier design (based on a magnet stack of dimensions of 6" x 1.5" x 1.5"). The most recent planned design (https://www.youtube.com/watch?v=huy53KdwAE4) is very different than prior plans of the S.H.O. Drive because it was uncertain that earlier designs would work at all.
The key issue with earlier designs was that the original thinking was that the influence of the side fluxes were minimal and so that the magnet would operate by interacting with the magnetic field that was inverted in the center. As it turns out, in the original geometry, the side fluxes account for about half of the magnetic flux linkage in the system. Subsequently upon realizing this mistake, it was originally thought that the variation of the intensity of the magnetic fields at the outer radius of the "S" coils would cause attraction that would cause rotation in the desired direction when the magnet was angularly displaced through horizontal angles (-/+ 45 degrees). However, it was also known that if the arms were too short that there would be a "sticky spot" where the magnet would slow down, although whether it was to a stop was at the time yet to be determined.
Since the coils were made before I had botched the magnet assembly, I was unable to adapt the coils according to the new plan because they were made shorter (21" along the "S" path instead of 24") in anticipation of a smaller magnet assembly. Building the coils before the magnets was actually intentional because the thinking was that the coils were the most risky part and the goal was to build both the coils and the magnet in the same video. Instead, the magnet stack was built too large and the "S" coils have shortened arms with a "sticky spot", and so the rotor stops after only a few rotations after being pushed vigorously by hand.
I also observed no acceleration effect at all when the magnet was moving through the horizontal angles (-/+ 45 degrees). The acceleration effect would have been due to the variation of intensity of the radially-directed part of the magnetic field at the outer radius of the "S". I have just remembered now that the reason for this variation was that the arms were to supposed to have reached all way to at least the "center plane" of the coils as one can observe in the S.H.O. Drive logo, which would cause a weakened intensity in the radial-directed part of the magnetic field at the "center plane" relative to its strength at the upper and lower parts of the "S". Also, it was known that the side-fluxes cutting through the central portion of the "S" would generate fields at the central plane opposing the rotation of the magnet, and in the actual build, it was these central fields that dominated due to the larger radius of the "S" in addition to the absence of flux cutting through the "S" hands when the magnet is in the horizontal position, flux cutting that would have helped the acceleration of the magnet through the horizontal angles if the "S" hands were formed at the central plane. But alas, the build was wrong!
The great advantage with the new design at (https://www.youtube.com/watch?v=huy53KdwAE4) is that it lacks any sort of sticky spots. In this newer design, the coil magnetic fields that dominate are the ones located at the outer radius. This is due to the tighter packing of the S-shape as compared to the older design. However, the magnets I had originally purchased were intended to make the magnet stack of 6" x 1.5" x 1.5", and they are unstable when set side-by-side horizontally, which is why I had bought brackets in anticipation of this problem. When I attempted to fit this "square peg into a round hole", the magnets decided to form the rod-shaped magnet that I chose not to build. So the next step is to buy magnets capable of easily forming the desired magnet arrangement as per (https://www.youtube.com/watch?v=huy53KdwAE4), and then fold the existing coils into the new design. The magnet pieces will be longer (up to 4" long), but thinner, magnetized through a thickness as small as 1/4". This will aid in the build process, which should be finished before the end of this fall. Sincerely, S.H.O. talk 17:40, 2 September 2016 (PDT)
Over 99% of the expenditures into S.H.O. Drive Mark I have been completed. New permanent magnets have arrived, and additional parts will be purchased for the new shaft.
After the build and several tests are conducted, the full expense report will revealed. Not all expenses turned out to be necessary to build S.H.O. Drive Mark I, so in the full expense report those expenses will be separated from per unit expenses that are embodied in the actual build of the S.H.O. Drive Mark I as well as the fixed costs related to tools and equipment which may be used to build additional units of the same. Sincerely, S.H.O. talk 13:03, 18 September 2016 (PDT)
Additional expenses are now anticipated, these being additional acrylic rods, clear elastic bands, acrylic scratch fill, shelter canopy for outdoor testing, and some clear nylon fishing wire rigs for suspending the device clear off the ground. S.H.O. talk 17:12, 30 October 2016 (PDT)
Additional acrylic rods, clear elastic bands, acrylic scratch fill, cantilevered umbrella, clear nylon fishing wire rigs, and a clip on camera have been purchased. The S.H.O. Drive build will resume in late November or early December. Sincerely, S.H.O. talk 11:10, 4 November 2016 (PDT)
Uploads, Housing/Weather situation, and Future S.H.O. Drives
The past month and a half have been focused on uploading all videos to date and producing time-lapse versions for reference. No new videos for the S.H.O. drive were recorded in the month of September 2016, and the same will likely be true for October 2016. The plan to go with the most recent design at (https://www.youtube.com/watch?v=huy53KdwAE4) remains, as is the goal to finish the build before the end of fall (Wednesday, December 21, 2016 per Winter Solstice).
I have acquired a second job which will provide extra income, so it is safe to say I will move back out to my own place either in the month of December or January. When I have my own place, I will be able to record videos again indoors for indefinite periods. In contrast, my current living arrangement has no space at all for experiments for it is not my house, and so I cannot simply put experiments wherever, let alone for indefinite periods. I have however entertained the idea of performing the assembly and experiments completely outside, which I am allowed to do. However, rainy season appears to have begun in Seattle, and so on a "good day" there will be overcast with no rain. While modifying the coil and assembling the magnets should only take a few hours, the test run will be much longer, and it is important to me that these are on the same day without interruption, so there is a challenge with timing for good weather on days when I am not at work if I choose to do it outside. The video will be up to 12 hours long if the S.H.O. Drive becomes operational, so it can be weeks before a good opportunity shows up.
While I am waiting for the housing/weather situation to get better, in preparation for the possible success of S.H.O. Drive Mark I, I have already designed a half-scale S.H.O. drive which should be more accessible for replicators. If S.H.O. Drive Mark I pans out, then some time next year I will be making "S.H.O. Drive Minis" and distributing them to popular YouTube channel owners with personalized instruction material. S.H.O. talk 12:49, 20 October 2016 (PDT)
Due to the scheduling issues with my second job, I have decided to let go of it. I have now decided to finish the S.H.O. Drive outside in a yard, which is now my only "financially responsible" option that I now foresee in building the S.H.O. Drive on schedule without hiccups. If the S.H.O. Drive works, then I may have reason to further renegotiate the terms of my current living arrangement, which is due to expire the end of this year. S.H.O. talk 12:02, 30 October 2016 (PDT)
After visiting over 15 different apartment complexes from Mid-September 2016 to Late-November 2016, I have relocated to a very spacious unit with direct outdoor access. I now have all the space I need in order finish the building of the S.H.O. Drive. The next build day for S.H.O. Drive Mark I will be sometime before Christmas. The build should be finished before New Year's Eve. Pictures and videos should be forthcoming in weeks thereafter. After several full-duration videos of S.H.O. Drive Mark I, dozens of S.H.O. Drive Minis will be built and distributed for free to high-visibility YouTubers, to be commenced and completed in the year 2017. One or more S.H.O. Drive Minis will be allocated for destructive testing, such as an unloaded shaft test and/or water submersion test. Sincerely, S.H.O. talk 16:33, 11 December 2016 (PST)
Presentation Outline (for S.H.O. Drive Alpha)
August 14, 2016
See also: YouTube/2016-08-14
August 26, 2016
See also: YouTube/2016-08-26
August 30-31, 2016
See also: YouTube/2016-08-30
August 31, 2016
Distance along shaft length (Depth)
For design plan as of August 14, 2016 inches 1 7/8 back end assembly behind panel 5/8 square acrylic support rod 1/4 square acrylic support rod 1/2 acrylic panel 7/8 vinyl cup hooks 3/8 air gap 1 1/2 neo magnets 3/8 air gap 7/8 vinyl cup hooks 1/2 acrylic panel 1/4 square acrylic support rod 5/8 square acrylic support rod 3 3/8 front end assembly in front of panel 12 total length of shaft
April 2016 Presentation
Summary of measuring devices, back up and safety equipment, and camcorder (+accessories)
Holes, brass hinges, square nuts
Neodymium magnets and bearings
Spool, coils, and ceiling hooks
No hidden batteries, increase rigidity, hex nuts, terminal rings, toggle switch, fan blades, and extended test run
Heavy duty basket, S.H.O. Drive insertion, secure meters, and portable extended test run
Square tote, plastic spools, protective edge trim, and enclosed extended test run
Prepare elevated test platform, outdoor test setup, camcorder hookup to portable power, and outdoor extended test run