It's amusing to see how we can twist physical data in all directions to conclude that a system is ultimately not of great scientific interest ...
And yet ... when we see all the systems made, from the start-up aid of the mower quoted by Macro, to the inertial wheel of some sports cars or public transport, we imagine that the preliminary scientific studies for these projects, made by specialists, had given promising results to try the experiment!
Afterwards, it is a question of means available and risk taking (means and economic risks mainly).
That said, there are many mediocre products that are very successful economically, like very ingenious products that do not find their market!
izentrop wrote:Hello,
Grelinette wrote:This system with spring reminds me of the little children's cars that rub on the ground to tighten the internal spring and let go: the car starts suddenly at full speed but stops 1 or 2 m further!
Friction cars? A flywheel but no spring. On a normal scale, they would make a huge weight.
I'm talking about a toy with an internal spring: the car is rubbed in reverse to tension the spring, which is moreover a "click click click", then the spring relaxes and propels the car fully over a few meters.
By the way, looking for the small spring car on the net, I found that approaching the spring hybrid bike:
http://french1.peopledaily.com.cn/Sci-Edu/8073710.html
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