Re: Electronic artificial horizons
I'm very interested in these for an entirely different reason.
Just how accurate are they? I ask, because a solid-state rate gyro that I was looking at for another application had quoted short-term accuracy of one degree per second, which wouldn't be much help in an AI. It also had "output noise" equivalent to +/- 3 degrees or so.
Some of that could be taken of by using integrators and averaging, but I'm still apprehensive.
To get the sort of accuracy needed for IFR flight, the inference was that you need either electric (mechanical) gyros, or ring laser ones. The latter are excellent, but scarily expensive.
So how do these devices do it, or are they also scarily expensive?