> the main issue on the Max is airodynamic lift generated by the nacelles at high AoA. This simplifies the physics so much that it's wrong. It is true that the

> the main issue on the Max is airodynamic lift generated by the nacelles at high AoA. This simplifies the physics so much that it's wrong. It is true that there are texts attributing everything just to the "nacelles", but the engineering doesn't work the way you argue: First, you can't put the engines on the plane without some casing for them (you have to have nacelles). Second, if you'd try to modify the casing of the engines (the said nacelles) to have other aerodynamic properties, you'd interfere with other design goals (e.g. you can increase the fuel consumption which was the most important design goal for the MAX). Third, the position of the engines definitely does matter for the behavior like "nose up" as long as the rest of the plane has some already determined form, which in this case is what has to be kept to have the plane being 737 and not something completely different. In short: the 737 MAX is Boeing's equivalent of VW's diesel cars. Its behavior was determined by the prescribed design goals (by those who sold the plane): Boeing simply directly lied, selling something that can't be achieved given the "sold" design characteristics. Just like the diesel cars can reduce nitrogen oxides production, but then they are less "efficient" than as they were sold (they need more refills, or use more fuel, i.e. cost more than advertised). Likewise, the 737 MAX-like plane could have been safer, but then Boeing could have not sold it as a plane for which there's "no need for pilot's re-certification and retraining." At the end, Feynman conclusion of his Shuttle investigation report holds: "For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled." Note also: https://www.theguardian.com/business/2019/apr/15/former-head-of-volkswagen-could-face-10-years-in-prison https://www.theguardian.com/business/2019/apr/15/former-head... ("Former head of Volkswagen could face 10 years in prison -- Martin Winterkorn and other executives charged with fraud over emissions test cheating") I'm quite sure Boeing's "heads" won't even be charged. And no, the "nacelles" aren't the main issue. It's the fraudulent selling of the planes which can't deliver what they were sold for. Fraud. (P.S. It's "aerodynamic")