![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwtCmQruufLiewdXfqmLeZgbuY4MSXokHD8xEq0szXvc4qtAnyOycVaGjauq3AoMt_NHGnj0qMp9TzIG-mK11HEn7SEPOdjlpKfIySvnUpRcHV4OmBvqEHIEkBEsMdSu1o94quNEPekLlw/s320/IMG_6471.JPG) |
Fan from last time.
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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjDQA3uI_ff8gXmzTy2rNNP2tJ5oSKSw1hna1oKmYY7EgKpr3Dkvw79NcYFnWN5r8qj4A-bRCkY8hCxLIyE62FmiYZYBKXYMAk3hzh1QhtG0iuv7R3YiptCOCnZywk7fbza_4oLSGzCa-o4/s320/IMG_6562.JPG) |
New fan, mounted on a bicycle front wheel hub. 4 cd's as blades, 15 degree pitch. On our front gate.
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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1NWAc3QWCHitISMdnIcRgQdqoYwOvF8BGraymolsLGxYGQyrjRMSIzlho8AWflDOnjHffHjAM91cO-QzVaxwkWC0j8Kcz_hxkpk8HmYe3f2NO4ZdaH-V9VrOGY16zibA3qk8J-s_QooX4/s320/IMG_6547.JPG) |
This was the same fan outside our back door. It fell apart twice in this spot, it was quite windy.
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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXdFjy_SZ6WaoacuksMOkp_R7DJPQiLcVoNSIyDIRS7ws1weHtWfcs3By_2OiifU6meRoU-EKPMRBOF1rR8WBrbwxaZEQdX4zhzPqkOvyGqaKiBlXaRFMjaBfs2-lpEBpjqdMO3DvalexO/s320/P8120079.JPG) |
Cd tessellation. First I made the red parts, which takes a clockwise set of cds, then the brown ones which take a clockwise set. The red and brown parts are the same as the fan hubs but have a 5 degree pitch.
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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiR3Vpi-Xs-3P00lf7oFApUVr5X3ECpP_n9I_vQvmBu9YX-noYARX20BJvVO6lVTFGQeLcnJ8tHzqyHKBIrjD6Xa29d_u18SehOHYGZL57MUKicGdVw_ob5ekncwVUIr2XO16ldbO5KcO9p/s320/P8120077.JPG) |
Obverse |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjJ1SyMfp_bHC6r4JXhPJ-gVCHHfEKakfAC-6gwZTB-nVEi6AmQyGK7qVUm-HxhdSSLo1-s59Au76_8w1JV_Opom1UBqmxg9YfSgEpqo7dMY0GEgAJHQY9y-Li7Jr5zY61H0nN94wGHNTxP/s320/IMG_6554.JPG) |
Sun reflection from a set of cd's in a fan
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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgjaQWmEXiJVgGBMpgAZkF5UYhvoi2SBR2XZiUxTteBg2XY5FMpquBVBeWh3SZEyDq76Kl_qd5-M9vwWIeuSDO8-Lp16yRm15tDP2gG9ZoMmdtwqu68cMVAxvf-pUbbsDOdMoYVSc1qEmT4/s320/IMG_6555.JPG) |
More reflections
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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQm_QgsU-rifczv3F7dg6buyp9jH5ucAFHCpY4cXeLgkcFVVHftNaUSQrmdIocRtPLEw0OiXz7eyZ1hEin87JJUMqM7Ktubjgb3cDaf5cCzOINLA8Y24blW1wd_NcEOCYfmpkNBfFv9eFO/s320/sizes.JPG) |
2d cad drawing showing adaptation of cds to become square patterns. Ist drawing is as above, second is as per the cube clock here
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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiWrXqFbvyrsFbZosM35IAHml7due3wOwrMzMDAsDp1YnshmUVIjNwSLiz8QV9o6K3Hq_xFGpUOjxoc6fsARkbsOZU9vvaDiHsWrlyqxpwhy2jAUROwlCxmocf8R0mRHbrv01LzmlJG_Af8/s320/tess+1+1.JPG) |
More 2d cad, this is the basic unit of the tessellation,
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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEic928Vh1POjTtg-CZLJSIzp84_1YNJpAsJ_UBExjJj_7cpKN1W1QrGKijjO8F435rQA51h3pIm7KKuCGnWrOM0IxW0OMnBvo5vXPl_N9mWBknP3WflQU5v5tlillltAiwUNvyTVZCyrU3X/s320/tess+1+25.JPG) |
and the whole pattern, the mirror side.
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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhlq9PUT7iiD-ysO0AfSZoOasUX0wn4RhvnmhuaUygMSAjRtnDpWHaNg9mvKp0dvStzp7N22wc_8iYMZer079bdqJKkl-XIwQwI_BxOvv5btj8_b3GBCFHLLpcZbG25qZ4aYLScKfa7-dlR/s320/tess+25+obverse.JPG) |
and the whole pattern, the picture side
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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi4TITnzbhfs3LPd9ce4s_QMFv4SH2qW-RPGYPxtckTFjjqBfkqETZbud4hOj09hR6NWKA5XJflZqIsB_sApSF3COR1Jy7cXxjb9_hSKiXT7YsKkcOtkKu9UBWTrpz0jkf6nL1EGrJMgaEj/s320/tess45+1.JPG) |
The same pattern with cds rotated through 45 degrees.
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Hi
This shows some more work I've done making fan hubs, and continues on from this post. After looking at them for a while, I realised the fan hubs could have a different role, as a tessellation hub. I needed to make some mirrored parts and printed them, then managed to make a basic 16x pattern. This sort of tessellation pattern has 4 sets of parallel cds. The cds in the set could act as coplanar mirrors. This blog series is continued here.
Regards Steve Nurse
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