Originally Posted by
Geriaviator
Agreed, but my point was why Sperry made an instrument that displayed the reverse of all other AH. It must have been like an aircraft with crossed controls where up was down and down was up.
Its not Sperry, it’s a design philosophy.
Russian attitude indicators are “reversed”
compared to western also.
Its just a matter of which one becomes the industry standard.
https://en.m.wikipedia.org/wiki/Crossair_Flight_498