Going for an industrial sci-fi look. The hard angles give these letters the appearance of being made by some kind of tape or roller.
This font was originally designed to be uppercase only. So, the lowercase might be considered as an alternate set.
Original size: 24pt (24pt, 48pt, etc. look most crisp when not using antialiasing)
An experiment with propellers. It seems to me like something four would make. Suggestions are welcome. Thanks.
02/08/17: Thanks to the new Kerning feature, a separate "r" is no longer required. Also made the rings a little rounder and fixed the rings on U and u.