3 ms·

It just needs to behave like a regular 777 and you can partly do that using software emulation.

by threatripper 7y ago

aritmo 7y ago
Just like the 737MAX?
- unethical_ban 7y ago
  No, wrong. The MAX did not behave like its predecessors.
- akie 7y ago
  Not sure why you're being downvoted because this is exactly what went wrong with the 737MAX.
- Gwypaas 7y ago
  The 777 is Fly-By-Wire so it never felt like anything other than what it was programmed to feel like.
- p_l 7y ago
  Actually the opposite. Had 737MAX gone the way of 777, there would have been no MCAS - but it would involve significant rework of control system, new avionics, and a lot of training. The core difference is that even the original 777 is a Fly-By-Wire system with programmed behaviour, in fact it was a well known case study in building civilian safe FBW systems. Because of that, there's no need to "patch over" differences like it was done with MCAS, as the minute adjustments can be done across the whole flight envelope protection system that is already there since first 777. In fact, 787 controls are derived from that and use software adjustment extensively in order to make control surface generate less drag yet still be usable.
heisenbit 7y ago
It is very easy to make a new thing behave like the old thing for the standard use case. The problems lie all the corner cases. In some cases making the standard case even more perfect can make the corner cases even worse (737 MAX). These airplanes are complex and flying exposes them and their crew to wide variety of stresses. Just the fact that these planes are getting longer and longer will have some side effects on how they handle. Maybe more caution is required when taking off, maybe the body vibrates very differently. While weight may be the same it is also further out which changes the handling dynamics. These make be small matters which may not matter until they do.
- Gwypaas 7y ago
  Not really. The 777 has Fly-By-Wire controls with all the envelope protection and redundancies that comes with that. I.e. failing safely but step by step offering less protections to the pilot the more it fails, until you are down to the few essentially mechanical ways of controlling the aircraft. The only reason a 777 felt like 777 is because it was programmed to be one. Compare this to the 737 MAX which still relies on mechanical linkages and two different flight computers with the pilot supposed to be the safety when they disagree, there any change introduces differences in the feeling and handling at the pilots hands. Question Boeing's recent engineering and similar all you want, but this is completely different.
zweep 7y ago
Imagine rewriting Microsoft Windows in Java and making it behave like old Windows. It just isn’t ever going to happen.

It just needs to behave like a regular 777 and you can partly do that using software emulation.

aritmo 7y ago

Just like the 737MAX?

unethical_ban 7y ago
No, wrong. The MAX did not behave like its predecessors.
akie 7y ago
Not sure why you're being downvoted because this is exactly what went wrong with the 737MAX.
Gwypaas 7y ago
The 777 is Fly-By-Wire so it never felt like anything other than what it was programmed to feel like.
p_l 7y ago
Actually the opposite. Had 737MAX gone the way of 777, there would have been no MCAS - but it would involve significant rework of control system, new avionics, and a lot of training. The core difference is that even the original 777 is a Fly-By-Wire system with programmed behaviour, in fact it was a well known case study in building civilian safe FBW systems. Because of that, there's no need to "patch over" differences like it was done with MCAS, as the minute adjustments can be done across the whole flight envelope protection system that is already there since first 777. In fact, 787 controls are derived from that and use software adjustment extensively in order to make control surface generate less drag yet still be usable.

heisenbit 7y ago

It is very easy to make a new thing behave like the old thing for the standard use case. The problems lie all the corner cases. In some cases making the standard case even more perfect can make the corner cases even worse (737 MAX). These airplanes are complex and flying exposes them and their crew to wide variety of stresses. Just the fact that these planes are getting longer and longer will have some side effects on how they handle. Maybe more caution is required when taking off, maybe the body vibrates very differently. While weight may be the same it is also further out which changes the handling dynamics. These make be small matters which may not matter until they do.

Gwypaas 7y ago
Not really. The 777 has Fly-By-Wire controls with all the envelope protection and redundancies that comes with that. I.e. failing safely but step by step offering less protections to the pilot the more it fails, until you are down to the few essentially mechanical ways of controlling the aircraft. The only reason a 777 felt like 777 is because it was programmed to be one. Compare this to the 737 MAX which still relies on mechanical linkages and two different flight computers with the pilot supposed to be the safety when they disagree, there any change introduces differences in the feeling and handling at the pilots hands. Question Boeing's recent engineering and similar all you want, but this is completely different.

zweep 7y ago

Imagine rewriting Microsoft Windows in Java and making it behave like old Windows. It just isn’t ever going to happen.