George, you are not even a proper weenie. The flux capacitor is from 'back to the future' If you persist on trying to be a weenie, you have some research to do. And get a pocket protector, aisle 3, on the left.
Leo, while trying to research if a round slide rule even exists, I discovered that there's an entire subculture on the internet dedicated to slide rules. Go figure.
Not to mention that better calculators than the one that went to the moon were being given away by banks by about '80.
The round slide rules were issued to navigators on aircraft. Took up less room, gave the required accuracy even on the inner scales and could be used with one hand. Other versions exist.
The Saturn 5 at about 500,000 gallons / mile for the first couple hundred yards gets worse mileage than even Nuck's Excursion. Once out in the passing lane, nothing would catch it. I was at a pre-moon landing launch in about '67. You could FEEL the vibration thru the ground miles away. The air could not transmit the full loudness and it came to you as a series of pops. The flame out he back was easily 3x the length of the launch vehicle itself. The Saturn as it launched the moon stuff was over 350 feet long so you can imagine the spectacle of a night launch.
No, David, when the lights go out, I call an electrician, like everyone else. Go Figure, indeed. When the lights go out (global, it's coming) nothing will help.