{"id":37,"date":"2018-08-14T16:17:27","date_gmt":"2018-08-14T16:17:27","guid":{"rendered":"http:\/\/commons.princeton.edu\/65-tiger-cub\/?p=37"},"modified":"2018-08-15T13:37:23","modified_gmt":"2018-08-15T13:37:23","slug":"feb-16th-day-5-jamie","status":"publish","type":"post","link":"https:\/\/commons.princeton.edu\/65-tiger-cub\/2018\/08\/14\/feb-16th-day-5-jamie\/","title":{"rendered":"Feb 16th (Day 5) – Jamie"},"content":{"rendered":"

Focus this week: COMBUSTION<\/strong><\/p>\n

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In Lab Last Time<\/strong><\/p>\n

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Forks: Used the parts cleaner to remove the grease from the forks. Unscrewed collars of the fork: tried a strap wrench, then Al used a machine to make the proper tool using the shape of the collar<\/p>\n

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Wheels: took off speedometer, unscrewed bolts, took out the wheel barings with a hammer, tried to press down in the valve to release the air, then removed whole value<\/p>\n

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Clutch: worked to get off the cover off of the timing side in the bottom part of the engine. Used manual impact wrench<\/p>\n

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Fasteners: measuring the engine cover to make a gasket, wasn\u2019t successful<\/p>\n

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Bottom End: removing casing on the timing side with the clutch team, drained oil still inside the engine (there are 3 oil chambers \u2013 oil reserve tank (reservoir), center chamber where the transition is \u2013 lubricates parts, reservoir on the clutch side \u2013 lubricates and cools clutch parts)<\/p>\n

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Top End: separated head of the engine from the bottom, took off top of the piston, took apart rocker assembly, valves removed<\/p>\n

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Electrical: figured out how bullet connection works<\/p>\n

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Frame: took off little parts of frame, tried to use arbor press to push out the swing arm pin, but it was in too tightly. Used hydraulic press to push it out<\/p>\n

\u00a0<\/em><\/p>\n

#1 priority for this time: we want to get the black parts ready to be powder coated.<\/em><\/p>\n

\u00a0<\/em><\/p>\n

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Chapter 2 in Shop Class as Soulcraft<\/strong><\/p>\n

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No motorcycle references<\/p>\n

Ale K: Making what used to be craftsmanship into work that requires less skill. This is what has made manual labor less valued – people don\u2019t think about craftsmanship.<\/p>\n

Ellie: Low labor cost is valued. Takes away from craftsmanship, too.<\/p>\n

Diego: There are jobs that are hard to replace with machinery, but we\u2019re on that trajectory<\/p>\n

Prof. Littman: Governments and corporations attempt to mechanize work: increase volume and decrease cost<\/p>\n

Ale K: More trade-based training in prisons? Standardized testing doesn\u2019t allow for considerations of individual difference<\/p>\n

Diego: Introducing human variables has economic risks<\/p>\n

Izzy: Once you start moving from humans to machines, where do you stop?<\/p>\n

Prof. Littman: Interesting discussions here about expert systems. You clearly don\u2019t want to have people replaced entirely. What happens when computers make all the decisions in our lives?<\/p>\n

Jamie: This is like Zen \u2013 fear of technology and its future.<\/p>\n

Izzy: I agree. It\u2019s not a really realistic view but it\u2019s healthy to have a sense of apprehension.<\/p>\n

Prof. Littman: p. 51 \u2013 creativity is the byproduct of mastery of the basics<\/p>\n

Preston: Do you think we will always need skilled laborers, Prof. Littman?<\/p>\n

Prof. Littman: From a consumer POV, we probably don\u2019t. We just replace things instead of fixing them. But we have to pass down knowledge to the next generation.<\/p>\n

Triumph Tiger Cub Engine Calculations<\/strong><\/p>\n

Prof. Littman demoed the ping-pong rocket!<\/p>\n

– \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Vessel filled with water and a bit of acid<\/p>\n

– \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 If you hook a battery to water, the positive electrode will attract OH–<\/sup>\u00a0and the negative one will attract the protons<\/p>\n

– \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Columns filled with H and O, lit spark (increased pressure), ping-pong ball flew<\/p>\n

\u00a0<\/strong><\/p>\n

Grace: Gasoline reacts with oxygen to produce carbon dioxide and water vapor<\/p>\n

Prof. Littman: CC = cubic centimeters, our engine is 200 cc or 1\/5 liter. This is a square engine- roughly 6 x 6 x 6<\/p>\n

Diego: energy released is based on air-fuel mixture. Proportion of fuel to air can give you different powers<\/p>\n

Parker: Air-fuel ratio is 15<\/p>\n

Prof. Littman: It\u2019s done by weight. A gram of fuel is 44K Joules. That\u2019s a lot! (Boxer\u2019s punch is 4J.) Take that fuel, react it with air, and the horsepower of the engine that is released is 50 J if none is wasted.<\/p>\n

Parker: When you combust the fuel it heats up the engine block and you lose some energy.<\/p>\n

Prof. Littman: Also, hot gas comes out of the engine. 1\/3 of what\u2019s available is what you get. If you run the engine faster, you get more horsepower (more explosions for time). THE most important thing about engines: the amount of oxygen. Engine breathing: take a gulp of air, react all of the air is the best you can do. If you want more energy per explosion, add more air.<\/p>\n

Chris: You could pressurize the air or use a different fuel with higher Joules\/gram.<\/p>\n

Diego: Or a bigger engine.<\/p>\n

Prof. Littman: Nitromethane fuel has oxygen in it.<\/p>\n

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We looked at model of Model T engine.<\/p>\n

\u00a0<\/strong><\/p>\n

For Next Time: Article about combustion chemistry posted on library site, Chapters 5 and 6 of ZAMM<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Focus this week: COMBUSTION \u00a0 In Lab Last Time Forks: Used the parts cleaner to remove the grease from the forks. Unscrewed collars of the fork: tried a strap wrench, then Al used a machine to make the proper tool using the shape of the collar Wheels: took off speedometer, unscrewed bolts, took out the … Continue reading “Feb 16th (Day 5) – Jamie”<\/span><\/a><\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-37","post","type-post","status-publish","format-standard","hentry","category-diary"],"_links":{"self":[{"href":"https:\/\/commons.princeton.edu\/65-tiger-cub\/wp-json\/wp\/v2\/posts\/37","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/commons.princeton.edu\/65-tiger-cub\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/commons.princeton.edu\/65-tiger-cub\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/commons.princeton.edu\/65-tiger-cub\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/commons.princeton.edu\/65-tiger-cub\/wp-json\/wp\/v2\/comments?post=37"}],"version-history":[{"count":1,"href":"https:\/\/commons.princeton.edu\/65-tiger-cub\/wp-json\/wp\/v2\/posts\/37\/revisions"}],"predecessor-version":[{"id":38,"href":"https:\/\/commons.princeton.edu\/65-tiger-cub\/wp-json\/wp\/v2\/posts\/37\/revisions\/38"}],"wp:attachment":[{"href":"https:\/\/commons.princeton.edu\/65-tiger-cub\/wp-json\/wp\/v2\/media?parent=37"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/commons.princeton.edu\/65-tiger-cub\/wp-json\/wp\/v2\/categories?post=37"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/commons.princeton.edu\/65-tiger-cub\/wp-json\/wp\/v2\/tags?post=37"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}