This isn't necessarily true in this case. Yes, if the aircraft had only one engine on each side of the roll axis then a corresponding reduction in the opposing engine would be required. However, with 18 engines and either 8 or 9 engines on each side of the axis (depending on orientation of travel), there are multiple opportunities to increase thrust from other engines on the same side to offset the failed one. Of course, this assumes we're not already at max thrust of the system. In an active system such as this it is unlikely that the pilot would be able to command "true" max thrust of the system as there would be some percentage held in reserve for just this sort of attitude control scenario.

On Thursday, December 17, 2015 at 4:03:19 AM UTC-6, Martin Gregorie wrote:


Don't forget that loosing any one thruster requires a thrust reduction
from the rest that's exactly equivalent to stopping the corresponding
diametrically opposite thruster. It is doesn't do this it will go skating
off sideways in the direction of the failed thruster.

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martin@ | Martin Gregorie
gregorie. | Essex, UK
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