First post.. my question involves a proposed aircraft, to be made by a truck company, and I am seeking some information to sort out realism vs fantasy. The aircraft in question is the Workhorse "Surefly", which looks like an overgrown "drone" quadcopter. (I can't post links, so you'll need to look it up if interested.) The company promoting it claims a lot of wild things, which I don't mean to address here. But one of the key claims is that it will use "a 200 hp, 6,000 RPM av gas engine". While I don't think much of their design, I'm guessing they at least did some kind of search to claim the existence of such an engine. My questions to all of you are as follows: Is/are there any candidate(s) that fit this description today? Anything that would be out there soon? Are any of them useable on an aircraft that would be certificable as a production (i.e., not Experimental) aircraft? Thanks for any help! Please know that partial knowledge or even outright speculation is still good; links to additional info GREATLY appreciated.