msbbarratt
I often wonder though; given that all flight dynamics on all aircraft types can (presumably) be expressed by systems of differential equations, are we missing a trick? Implement the equations in analogue but have a digital wrapper around it to provide the modern supervisory functions? If it could be done it would save weight, power, cost; an analogue circuit could be made really, really small these days.
That of course is essentially what was done on the intake control system. The basic analogue "inner loop" was retained to do the actuation but it operated to non-linear laws and limits defined by a digital system.