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Showing posts from August, 2020
Transparent Cars
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Shell Helix car with transparent petrol engine https://www.youtube.com/watch?v=W3HM1bQzubw https://www.youtube.com/watch?v=-yObL6U7URM Projection Transparent Car https://www.youtube.com/watch?v=gDk5HdGfuVI&t=43s https://www.dailymail.co.uk/sciencetech/article-2417772/Transparent-car-acrylic-showcases-generation-automotive-safety-technology.html
Vibration Analysis and Floating Car
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Interesting comments about vibration analysis and floating Cybertruck. The vibration analysis is to detect failures in bearings and shock absorbers which are vital towards driving comfort. For healthy people, it is less of a problem but for the women and elderly they are severely affected. My wife even got sick out of driving a car with old shock absorbers that appear to work. I just replace all of them after 5 years. The replacement worked so well for my Proton Exora. We can use air bags in front and back for floatation devices as well as a method to protect the passengers and reduce aerodynamic drag. However it makes it more difficult to exploit the propulsive power of air compressors and heat generated by batteries and motors in the cooling process, by exploiting the principle of zero aerodynamic drag. https://www.youtube.com/watch?v=GUiwKL7fV_I&t=1890s
Relative Cost and Strengths of Materials
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The idea for a transparent car does not come from this article but this is the most complete analysis that I can find in the internet for free. http://www2.gvsu.edu/peirsonb/spec_prop.pdf The cost analysis could be faulty. The cost is per unit volume so is wrong. So divide the values by densities in order to give comparable performances. Plastics may not be strong by volume but by weight they are equivalent or even superior for the same cost. The prevalance of plastic toys is a good example of that. It is suprising that we cannot find plastic cars. What is needed is just thicker materials and the weight will be even lower for the same strength. Cold rolled steel, C1018 may be slightly cheaper, 160 vs 213 for polycarbonate, but steel will rust and difficult to work with. Acrylic is not mentioned, but it is even cheaper but stronger than polycarbonate. It even has high transparency. Acrylic has a problem in that it breaks easily, although up to 17 times more impact resistant than gl...