A start-up SME hosting a new and revolutionary 'green' energy device. FeTu's novel invention targets carbon reduction by replacing a commonplace conversion device with an ultra-efficient alternative. Since the dawn of the industrial revolution, there has been a fundamental need to convert stored energy to 'work'; pumps, compressors, expanders, engines and turbines broadly use one of two mechanical conversion platforms, 'rotary' or 'reciprocating', both of which are century-old two-dimensional principles. The novel & disruptive FeTu 'roticulating' system is entirely different and utilises a three-dimensional 'spatial' concept; offering a compact, high efficiency, resilient, reliable, platform to convert between all manner of volumetric and rotational energy sources. Rotational to volumetric conversion: a positive displacement, high volume, bi-directional, self-priming, ultra-efficient, low shear, high pressure, pump; or a low-energy, high-volume & high-pressure compressor. Volumetric to rotational conversion: an ultra-efficient, oil free, light weight, power dense, omnidirectional powertrain capable of running most open and closed loop thermodynamic cycles, appropriate to power generation, transport, marine, aerospace. Volumetric to volumetric conversion: FeTu can perform fluid to fluid energy conversion and simultaneously top up or extract power from its additional rotational element. FeTu is the world’s first 'quad-acting' drive system, utilising only two moving parts to create four anti-phased chambers which 100% evacuate with each revolution, offering inherent downsizing, downspeeding & downweighting.