For at least one week in 1918, the slide-rule jockeys lounging about in the faculty watering holes at the aeronautical engineering brain-trusts believed that the propeller illustrated herein was pretty slick, and bound to bring greater speed to the aircraft of the day. But the bright lads at OldMagazineArticles.com couldn't help but notice that this propeller design was never seen any time after this issue of POPULAR MECHANICS was on the stand, so we have our doubts concerning the "increased efficiency" that the propeller was credited in creating...
(The propeller illustrated in the article is far more queer than the one pictured on the right)
What do you think?
