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It's not that simple. I don't believe the unassisted aircraft meets the stick force/stability requirements of FAR 25. Even if it were a completely new type, i
by cameldrv 8y ago
It's not that simple. I don't believe the unassisted aircraft meets the stick force/stability requirements of FAR 25. Even if it were a completely new type, it would need some sort of stability augmentation to be certifiable.
- bilbo0s 8y agoMeeting FAR 25 is generally done by adding something like hydraulics, or electric engines to assist in moving control surfaces. Both solutions capable of working even in thte case of full engine and power shutdowns. To put an automated system on top of your force assists just seems like asking for trouble. In layman's terms, the more you pile on, the more that can go wrong. All that said, as a matter of full disclosure, I only know how to fly planes, not really an aeronautical engineer.
- cameldrv 8y agoThere are lots of ways to meet the handling and stability requirements for certification. You could just design the airframe to have the right stick force profile, you could have old school mechanical/hydraulic augmentation systems, you could have an electronic augmentation system like MCAS, or you could do what Airbus does and simulate the forces and responses of a virtual airplane, and then have the computer actually do the flying. These all can be done in reasonable and safe ways. Boeing just didn't do it.