We been shooting lead bullets for 700 years and then some, this like a lot of things is based on Junk science. But yep its going to happen. They are going to discontinue 100 LL avgas. The New fuel is going to be 94 UL or something like that, only it will not work well in about 13. 5 billion dollars worth of aircraft. Knocking problems. But the EPA is pushing it, and the aviation industry is will out of time. In my 35 years of flying I have seen 80 90 100 and 130 go, and using motor fuel in place of 80 for awhile till they started mixing ethenol in to the car gas. Well there is a bright spot in all of this, RR is making a version of the 250-20 Allison turbine that will weigh just 300 lbs and be rated 300 hp and its intended to replace the 500 Lycomings and Continetals, so its going to be Jet A. Only thing is that a new IO-540 Lycoming will set you back maybe 40K and burn 15 gallons an hour, the new RR engine will be about ten times that. A whole bunch of airplanes will become hanger queens. if its not figuired out. Its not broke why fix it. Same for lead bullets.
