|
|
|
|
|
|
by sokoloff
1652 days ago
|
|
|
It is risky without a drop-in fuel. There is a significant, recent milestone on the journey here: https://www.avweb.com/aviation-news/faa-approves-600-engines... That accounts for around 25% of the gallons sold per year, but the underlying engineering is in better shape than that first step regulatory approval indicates. (The fuel has been running in the test cell and flying in the higher-powered, tighter-margin engines for years already with the airplanes in the experimental-R&D category.) |
|
|