This is something a little different, but I think quite interesting. I have been learning recently about the work of Serbian inventor Veljko Milkovic who for years has been working on machines that uses a combination of pendulums and lever transfer to improve the efficiency of energy transfer – the term he uses is ‘mechanical amplifier’
Here is an older video (2008) demonstrating the use of this principle in a hand-powered water pump.
In a more recent video (October 2021) shows an adaptation of this system in which Milkovic uses a flexible pendulum and flexible lever which he claims is far more efficient than previous systems.
In this video he demonstrates his pendulum-lever system and compares it with various rotating wheels.
He states: “Oscillations are far, far, more efficient than rotations . . . so what is happening? The rotations are slowly coming to a standstill, and the pendulum keeps oscillating. So, here we have an elastic (flexible) pendulum and an elastic (flexible) lever, that is, the lever on an elastic (flexible) support. A prototype has been made and it is evident that unexpected problems have not occurred. So there are no unwanted horizontal oscillations.
“So, this is a good path towards a big oscillator, for a much larger machine which will use an extremely small amount of input energy. So, the gravitation is a wind at the back here. The elasticity matches well in this oscillating system. A disadvantage of the previous oscillations was low speed, but here we show that high speeds are possible. Also, a lot of energy was lost on bearings. So, previous devices had bearings, consequently the friction was much higher but in the case of the elastic (flexible) pendulum, and elastic (flexible) lever, this does not occur, that is, the friction is considerably lower.”
More information is available at his websites:
He claims that in some of his systems a COP of 12 has been achieved:
“During the last few years, Veljko Milković did several measurings, which showed the energetic excess, 12 times larger than the input. That means that two-stage oscillations provide around 12 times more than the input.”