Originally Posted by
RetiredBA/BY
You must have been flying the Jaguar !
In the V force we did an acceleration time check to 100 knots.
Much later I suggested a system which I named TOPIS, Take Off Performance Indicating System and the concept was published in the Internationl Journal Of Air Safety many years ago. Basically the display, driven by the FMC was to drive a bug on the ASI giving the required speed. Any significant shortfall required a stop.
I thought Emirates was pursuing such a system, which modern electronics should make easy, after their take off incident at Melbourne, due I believe, to the wrong weights being entered in the FMC
The fog of time has dulled my memory but I recall we did something similar on the Jag along with a distance remaining or used check.
Far more critical however was having a place to aim the jet at should one of the afforementioned fuel to noise convertors decided to go into quiet mode.
On the B777 at EK in my time there we used a Boeing provided onboard performance tool or OPT which worked very very well, but as ever it required careful data input and cross-checking.