MCDi inventor, Andy Allen, has a deep history in high performance 2-stroke engines. Andy worked for Pratt and Whitney in Connecticut and then started a company (AMW Inc.) to manufacture and design 2-stroke racecar engines. AMW, Inc. won 10 national championships with its engine designs. AMW then merged with Cayuna (which produced ultralight engines and a gasoline engine for the military M17 decontamination unit) to form 2SI in Beaufort, SC. 2SI manufactured 2-stroke engines for the military, Andy developed the MCDi technology and eventually split off to form XRDi in Beaufort, SC.
From that point Andy and XRDi dealt almost exclusively with military prime contractors solving drone engine problems and providing a Heavy fuel solution to drone propulsion. Eventually this became know as the multifuel solution even though none of the competing technologies were truly multifuel solutions. They were primarily making a gasoline engine burn heavy Diesel fuel or jet fuels. The MCDi engines however could burn any fuel without any adjustment or retuning. This was not really a requirement; just a great innovation in solving the heavy fuel needs for drone engines.