If you are as old as I am you might find this interesting…
https://mediafiles.aero.und.edu/aero.und.edu/aviation/trainers/e6b/?q=sliderule
If you are as old as I am you might find this interesting…
https://mediafiles.aero.und.edu/aero.und.edu/aviation/trainers/e6b/?q=sliderule
Looks just like my metal one, minus some coloured text. Really handy. I wonder if it works well on an iPad. It would be handy if you could rotate the outer ring as well, to make it easier to read the bottom.