While talking about "the good old days" (
), i remembered seeing what i would call a "helicopter weight&balance calculator" mechanical computer, similar to the whizz-wheel/E6B…
It was for the UH1 aircraft, and looked like two sliding rulers with a disc connecting the two.
One side was for fuel, the other side for the payload…and it showed you where your CoG was…
Has anyone seen this thing, or can remember what it was called?