original question: Who designed [Vantage XP-360]?
answer: superior air parts
answer type: Engine designer.
auxiliary information: Designed and manufactured by Superior Air Parts of Coppell, TX, the XP-360 engine was the original experimental test-bed for the development of the Vantage engine series or family.  From a technical and performance standpoint, the Vantage engine series and XP-360 prototype are basically identical.  The biggest difference is that the Vantage engine series are FAA certified and the prototype XP-360 operates purely under the experimental category.  The XP-360 engine was introduced to aircraft homebuilders in the sport aviation market with an installed base as of 2010 of over 400.  The XP-360 prototype engine serves as a test-bed for the other Vantage engine series with continued planned product improvements and new technologies.  The XP-360 and Vantage engine series are not clones or even a copy of the Lycoming engine, but instead a next-generation piston engine series with technological improvements that can be certified on aircraft models where Lycoming 180 HP engines are also certified.  This process does require an FAA Supplemental Type Certificate (STC).
[Vantage XP-360] was designed by what designer?