Google the swift company and have a look at what they're doing, looks like they have
the solution for avgas. l remember 30 years ago the talk that we're running out of fuel and we're still going.
If the company Eestor have what some poeple are saying [why would they bother building assembly factories and spending millions on patents] looks like we could all be flying with electric motors!
we'll be having forums on what sort of speakers we're using for our engine noises!