Christophe wrote:It's still not very clear:
a) 126W during 2s that makes 252J ... it's a lot less than 1wh (3600J)
b) 140w during 8s that makes 1120 J ... it's always less ... but much more than 252J
c) Average power: 12 * 43 / 4 = 130W (which implies, if a), a continuous passage of the vehicle)
The devil is hiding in the details
A scientific publication is not a paper where one spreads random numbers not having clear relations between them, it is built with method, detailed formulas so that the demonstration is reproducible.
You are generous with the 3600 j by vehicle, just to recover this energy, the donkey no longer fulfills its function.
It is necessary to count down the energy that must be spent to bring the plate back to its original position. It will take a spring as a result that can eat half of your primary energy to work quickly and sustainably.