| PVI (or D) sense
I understood the idea was to be consistent with the 'natural' view out of the window - if the outside world moves to the left, you need left rudder to bring it back again (similar sense for other axes, but by the time I got to the Trident, only the lateral mode - for take-off and roll-out guidance - remained). So one had to think of the little diamonds as belonging outside.... but whatever worked for the individual was OK.
And how about the old cylindrical Directional Gyros, not exactly intuitive until one got the 'roll the numbers down the slope' mantra off pat. And while we're at it, which way should moving tapes move? High numbers at the top, so the tape slides down as the quantity increases, or vice versa? Good cases can be, and have been, made for both. And finally don't let us forget that the some Russians use horizons that are the wrong way round, the little airplane moves while the horizon remains steady relative to the aircraft, help! |