https://padlet.com/ThroughEngineersEyes/Week1 Post a picture of your experiments by double clicking on the white space. Click on any post to enlarge it. en-us 2016-07-26 04:05:37 UTC 2023-02-21 18:49:07 UTC hello@padlet.com https://padlet.com/ThroughEngineersEyes/Week1/wish/120996972 In the videos we used chairs we found in the studio. When I developed the experiments I was on my deck, or in my lounge room or my kitchen.]]> 2016-09-01 02:56:06 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/120996972 https://padlet.com/ThroughEngineersEyes/Week1/wish/121669842 I rummaged around in my box of 'useful springs' and found two that looked identical. I loaded them individually to find their stiffnesses, then connected them as in retro tut 1.9. Results: individual stiffnesses 13.6 g/mm and 15 g/mm giving a total of 28.6 g/mm. Stiffness as in 1.9 measured at 27.6 g/mm. Apologies for non-SI units. It is more complicated with non-linear springs but the same principles apply.]]> 2016-09-06 03:24:51 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/121669842 https://padlet.com/ThroughEngineersEyes/Week1/wish/121938615 It was good fun trying the experiment, even though my measurements were not as accurate as I would have liked.

John.]]> 2016-09-06 19:50:17 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/121938615 rlemaire https://padlet.com/ThroughEngineersEyes/Week1/wish/122288905 this is a measurement to compare two springs for extension under 83.6 g load.  In case the spring was stretched 14.18 mm
Raymond]]> 2016-09-07 23:01:40 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/122288905 rlemaire https://padlet.com/ThroughEngineersEyes/Week1/wish/122289071 2016-09-07 23:03:55 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/122289071 rlemaire https://padlet.com/ThroughEngineersEyes/Week1/wish/122289372 The weight is attached to the middle where the two springs are connected.  The distance the hook moved when the weight was attached is 11.38 mm

It appears that I have messed up your photo wall.

Rd Le Raymond]]> 2016-09-07 23:07:23 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/122289372 rlemaire https://padlet.com/ThroughEngineersEyes/Week1/wish/122289724 2016-09-07 23:12:49 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/122289724 https://padlet.com/ThroughEngineersEyes/Week1/wish/122623816 See week 1 Engineers' eyes for more details. The aluminium spring is in the middle of the wing.]]> 2016-09-09 00:53:20 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/122623816 https://padlet.com/ThroughEngineersEyes/Week1/wish/122624236 Here's the spiral spring I made. I didn't detect any creep but it's non-linear. More in week 1 engineers' eyes. ]]> 2016-09-09 00:57:06 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/122624236 https://padlet.com/ThroughEngineersEyes/Week1/wish/122634337 The explanation is in the forumn]]> 2016-09-09 02:36:32 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/122634337 https://padlet.com/ThroughEngineersEyes/Week1/wish/122635078 Explanation in Forum entry.
Tried to erase first attempts to make room no luck.
Raymond]]> 2016-09-09 02:44:59 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/122635078 https://padlet.com/ThroughEngineersEyes/Week1/wish/122989941 Here's a new kind of tension spring that I made from a soft drink can. It is linear and doesn't creep (as far as I could measure it). More details in week 1 'Engineers' Eyes'.]]> 2016-09-11 23:13:54 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/122989941 https://padlet.com/ThroughEngineersEyes/Week1/wish/122991470 Here's a paper model of the new spring, to show how you make it. You cut into a strip from both sides. It's best to mark it out first then make holes at the end of where you'll cut - it reduces 'stress concentrations' so it's less likely to tear. My spring was about 150 overall, 100 between end cuts, 25 wide with 5 margin.]]> 2016-09-11 23:34:30 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/122991470 https://padlet.com/ThroughEngineersEyes/Week1/wish/123241463 2016-09-12 17:53:14 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/123241463 https://padlet.com/ThroughEngineersEyes/Week1/wish/123714160 It was a real insight doing all the experiment myself. I joined the course late, but hope to catch up soon .. Interesting learning period..]]> 2016-09-14 11:15:40 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/123714160 https://padlet.com/ThroughEngineersEyes/Week1/wish/124918344 Here is the experiment using a broom stick, yarn cord, lenses case, and 40 quarters (USD). The initial length of the cord was 12.5 inches, and after 5 minutes, it became 13 inches long.

]]> 2016-09-19 22:29:51 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/124918344 https://padlet.com/ThroughEngineersEyes/Week1/wish/147279942 2017-01-16 03:37:45 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/147279942 erika_triebstein https://padlet.com/ThroughEngineersEyes/Week1/wish/168311220 My toddler helped load my kidney-bean weights. :) (Obviously not an ideal choice.) Only after 25 minutes did I record 3 mm. creep. After having read a classmate's enlightening comment, I wonder if this is because my 5 smaller rubberbands managed the load more efficiently. Huzzah!]]> 2017-04-26 08:53:56 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/168311220 erika_triebstein https://padlet.com/ThroughEngineersEyes/Week1/wish/168491711 2017-04-26 20:00:09 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/168491711 erika_triebstein https://padlet.com/ThroughEngineersEyes/Week1/wish/168562306 "Our" pan, dropped from its unstretched height, contacted the floor 3 out of 4 times. Cool!]]> 2017-04-27 07:42:17 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/168562306 https://padlet.com/ThroughEngineersEyes/Week1/wish/168797108 i utilized small rubber bands for my set up. it worked out just as the one in the illustration video. ]]> 2017-04-28 04:29:46 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/168797108 spitalgate https://padlet.com/ThroughEngineersEyes/Week1/wish/168851348 For my test rig, I used  a camerna copy stand made from an old enlarger column and baseboard. 25mm repair washers gave me a quicker result than the 1/4" washers suggested.]]> 2017-04-28 11:54:23 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/168851348 https://padlet.com/ThroughEngineersEyes/Week1/wish/169111334 Tried the experiment multiple times, with more than one rubber and with a single one aswell, i also tried different size loads. The following clip was while using multiple rubber bands]]> 2017-05-01 04:19:42 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/169111334 https://padlet.com/ThroughEngineersEyes/Week1/wish/169111549  experiment, using one rubber band only.]]> 2017-05-01 04:25:02 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/169111549 https://padlet.com/ThroughEngineersEyes/Week1/wish/169111858  using one rubber band and bigger load. This particular video was interesting to me, the rubber was able to widthstand the load, you can observe how the bounce repetitions were not to many, the rubber found itself easily at its ultimate stress]]> 2017-05-01 04:30:25 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/169111858 https://padlet.com/ThroughEngineersEyes/Week1/wish/169237346 I used disposable plastic drinks cups and the glass beads used for flower arranging. I found it easier to measure the spring lengths using a piece of string, which I then measured against a straight rule. I knew there was a good reason for having 4 bicycles in the dining room! I got similar results to the video and my dynamic bounce test didn't see the pan touching the floor either.

]]> 2017-05-01 17:29:15 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/169237346 https://padlet.com/ThroughEngineersEyes/Week1/wish/169326552 Experiment preparation]]> 2017-05-02 03:26:09 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/169326552 spitalgate https://padlet.com/ThroughEngineersEyes/Week1/wish/169480368 It would have needed hundreds of 1/4" washers to get sufficient weight, so I made do with larger repair washers.]]> 2017-05-02 16:40:19 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/169480368 https://padlet.com/ThroughEngineersEyes/Week1/wish/170270917 I was fun to try. I used Tracker to analyse the experiment.]]> 2017-05-05 20:39:25 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/170270917 https://padlet.com/ThroughEngineersEyes/Week1/wish/170326467 2017-05-06 20:04:07 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/170326467 https://padlet.com/ThroughEngineersEyes/Week1/wish/170644919 2017-05-09 00:24:45 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/170644919 https://padlet.com/ThroughEngineersEyes/Week1/wish/170645830 2017-05-09 00:32:39 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/170645830 https://padlet.com/ThroughEngineersEyes/Week1/wish/288927296 Here's a copy of the page in Brunel's sketchbook on the Great Eastern. See the posting in week 1 for details.]]> 2018-10-04 01:00:32 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/288927296 https://padlet.com/ThroughEngineersEyes/Week1/wish/289537162 Using a paper cup and some marbles.]]> 2018-10-05 10:52:10 UTC https://padlet.com/ThroughEngineersEyes/Week1/wish/289537162